BRAKE CONTROL SYSTEM SECTION BRC CONTENTS F BRAKES BRC-1 VDC/TCS/ABS BRC

Transcription

1 BRAKE CONTROL SYSTEM F BRAKES SECTION BRC A BRAKE CONTROL SYSTEM B C CONTENTS E VC/TCS/ABS PRECAUTIONS... 3 Precautions for Supplemental Restraint System (SRS) AIR BAG and SEAT BELT PRE-TEN- SIONER... 3 Precautions for Procedures without Cowl Top Cover... 3 Precautions for Brake System... 3 Precautions for Brake Control... 4 PREPARATION... 5 Special Service Tools... 5 Commercial Service Tools... 5 ON-VEHICLE SERVICE... 6 Adjustment of Steering Angle Sensor Neutral Position... 6 SYSTEM ESCRIPTION... 7 System iagram... 7 Function... 7 ABS... 7 EB... 7 TCS... 7 VC... 8 EC... 8 Operation That Is Not "System Error"... 8 ABS... 8 TCS... 8 VC... 8 Fail-Safe Function... 8 ABS, EB SYSTEM... 8 VC / TCS... 9 Hydraulic Circuit iagram... 9 CAN COMMUNICATION System escription TROUBLE IAGNOSIS...11 How to Perform Trouble iagnoses...11 BASIC CONCEPT...11 IAGNOSIS FLOW CHART ASKING COMPLAINTS EXAMPLE OF IAGNOSIS WORKSHEET Component Parts Location Schematic Wiring iagram VC CONSULT-II Functions (ABS) CONSULT-II MAIN FUNCTION CONSULT-II BASIC OPERATION PROCEURE Self-iagnosis OPERATION PROCEURE ERASE MEMORY ISPLAY ITEM LIST ata Monitor OPERATION PROCEURE ISPLAY ITEM LIST Active Test OPERATION PROCEURE TEST ITEMS For Fast and Accurate iagnosis PRECAUTIONS FOR IAGNOSIS Basic Inspection BASIC INSPECTION 1: BRAKE FLUI LEVEL, LEAK INSPECTION AN BRAKE PA BASIC INSPECTION 2: LOOSENESS OF POWER SYSTEM TERMINALS AN BATTERY BASIC INSPECTION 3: ABS WARNING LAMP, BRAKE WARNING LAMP, VC OFF INICATOR LAMP AN SLIP INICATOR LAMP Inspection 1: Wheel Sensor Circuit Inspection 2: Engine System Inspection 3: ABS Actuator and Electric Unit (Control Unit) Inspection 4: ABS Actuator and Electric Unit (Control Unit) Power Supply and Ground Circuit Inspection 5: ABS Motor and Motor Relay Circuit Inspection 6: Solenoid, VC Change-Over Valve and Actuator Relay Circuit Inspection 7: Pressure Sensor Circuit Inspection 8: Steering Angle Sensor Circuit Inspection 9: Park/Neutral Position (PNP) Switch Circuit Inspection 10: Stop Lamp Switch Circuit Inspection 11: Yaw Rate/Side G Sensor Circuit BRC G H I J K L M BRC-1

2 Inspection 12: Brake Fluid Level Switch Circuit Inspection 13: RAS Control Unit Circuit (With RAS) Inspection 14: ICC Sensor Integrated Unit Circuit (With ICC) Inspection 15: AW Control Unit Circuit (AW Model) Inspection 16: CAN Communication Circuit Inspection 17: VC OFF Switch Circuit Inspection 18: Parking Brake Switch Circuit Inspection 19: Warning Lamp and Indicator Lamp Circuit Symptom 1 Excessive ABS Function Operation Frequency Symptom 2 Unexpected Pedal Reaction Symptom 3 The Braking istance Is Long Symptom 4 ABS Function oes Not Operate Symptom 5 Pedal Vibration or ABS Operation Sound Occurs Symptom 6 Vehicle Jerks uring VC/TCS/ABS Control WHEEL SENSOR...57 Removal and Installation...57 COMPONENT...57 REMOVAL...57 INSTALLATION...57 SENSOR ROTOR...59 Removal and Installation...59 REMOVAL...59 INSTALLATION...59 ACTUATOR AN ELECTRIC UNIT (ASSEMBLY)...60 Removal and Installation...60 COMPONENT...60 REMOVAL...60 INSTALLATION...61 G-SENSOR...62 Removal and Installation...62 REMOVAL...62 INSTALLATION...62 STEERING ANGLE SENSOR...63 Removal and Installation...63 REMOVAL...63 INSTALLATION...63 BRC-2

3 PRECAUTIONS PRECAUTIONS PFP:00001 Precautions for Supplemental Restraint System (SRS) AIR BAG and SEAT BELT PRE-TENSIONER NFS000PY The Supplemental Restraint System such as AIR BAG and SEAT BELT PRE-TENSIONER, used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted. Information necessary to service the system safely is included in the SRS and SB section of this Service Manual. WARNING: To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in the event of a collision which would result in air bag inflation, all maintenance must be performed by an authorized NISSAN/INFINITI dealer. Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag Module, see the SRS section. o not use electrical test equipment on any circuit related to the SRS unless instructed to in this Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness connectors. Precautions for Procedures without Cowl Top Cover When performing the procedure after removing cowl top cover, cover the lower end of windshield with urethane, etc. NFS000PZ A B C E BRC G H I J Precautions for Brake System Recommended fluid is brake fluid OT 3. Never reuse drained brake fluid. Be careful not to splash brake fluid on painted surface of body. If brake fluid is splashed on painted surfaces of body immediately wipe off then with cloth and then wash it away with water. Never use mineral oils such as gasoline or kerosene. They will ruin rubber parts of the hydraulic system. Use a flare nut wrench when removing flare nuts, and use a flare nut torque wrench when tighten brake tube flare nuts. When installing brake tubes, be sure to check torque. Brake system is an important safety part. If a brake fluid leak is detected, always disassemble the affected part. If a malfunction is detected, replace part with a new one. Before working, turn ignition switch OFF and disconnect connectors of ABS actuator and electric unit (control unit) or the battery cable from the negative terminal. WARNING: SBR686C Clean brake pads and shoes with a waste cloth, then wipe with a dust collector. PIIB3706J NFS000Q0 K L M BRC-3

4 Precautions for Brake Control PRECAUTIONS Just after starting vehicle after ignition switch ON, brake pedal may vibrate or motor operating noise may be heard from engine compartment. This is normal condition. When an error is indicated by ABS or another warning lamp, collect all necessary information from customer (what symptoms are present under what conditions) and check for simple causes before starting diagnostic servicing. Besides electrical system inspection, check brake booster operation, brake fluid level, and oil leaks. If tire size and type are used in an improper combination, or brake pads are not Genuine NISSAN parts, stopping distance or steering stability may deteriorate. ABS might be out of order or malfunctions by putting a radio (wiring inclusive), an antenna and a lead-in wire near the control unit. If aftermarket parts (car stereo, C player, etc.) have been installed, check for incidents such as harness pinches, open circuits, and improper wiring. VC system may not operate normally or a VC OFF indicator lamp or SLIP indicator lamp may light. When replacing the following parts with parts other than genuine parts or making modifications: Suspension-related parts (shock absorber, spring, bushing, etc.), tires, wheels (other than specified sizes), brakerelated parts (pad, rotor, caliper, etc.), engine-related parts (muffler, ECM, etc.) and body reinforcementrelated parts (roll bar, tower bar, etc.). When driving with worn or deteriorated suspension, tires and brake-related parts. NFS000Q1 BRC-4

5 PREPARATION Special Service Tools PREPARATION The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here. Tool number (Kent-Moore No.) Tool name escription PFP:00002 NFS000Q2 A B C ST (J-25405) rift a: 77 mm (3.03 in) dia. b: 55 mm (2.17 in) dia. ZZA0701 E ST ( ) rift a: 75 mm (2.95 in) dia. b: 62 mm (2.44 in) dia. Installing rear sensor rotor BRC ZZA0832 G kv ( ) a: 76 mm (2.99 in) dia. b: 68.5 mm (2.697 in) dia. H I ZZA0832 Commercial Service Tools Tool name escription NFS000Q3 J K 1. Flare nut crowfoot a: 10 mm (0.39 in) /12mm (0.47 in) 2. Torque wrench Installing brake tube L S-NT360 M BRC-5

6 ON-VEHICLE SERVICE ON-VEHICLE SERVICE Adjustment of Steering Angle Sensor Neutral Position PFP:00000 In case of doing work that applies to the list below, make sure to adjust neutral position of steering angle sensor before running vehicle. Situation Adjustment of Steering Angle Sensor Neutral Position Removing/Installing ABS actuator and electric unit (control unit) Replacing ABS actuator and electric unit (control unit) Removing/Installing steering angle sensor Removing/Installing steering components Removing/Installing suspension components Change tires to new ones Tire rotation Adjusting wheel alignment : Required : Not required CAUTION: To adjust neutral position of steering angle sensor, make sure to use CONSULT-II. (Adjustment cannot be done without CONSULT-II.) 1. Stop vehicle with front wheels in straight-ahead position. 2. Connect CONSULT-II and CONSULT-II CONVERTER to data link connector on vehicle. CAUTION: If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be detected in self-diagnosis depending on control unit which carry out CAN communication. 3. Turn ignition switch ON and touch the CONSULT-II screen in the order of ABS, WORK SUPPORT and ST ANG SEN AJUSTMENT. 4. Touch START. CAUTION: o not touch steering wheel while adjusting steering angle sensor. 5. After approximately 10 seconds, touch EN. (After approximately 60 seconds, it ends automatically.) 6. Turn ignition switch OFF, then turn it ON again. CAUTION: Be sure to perform above operation. 7. Run vehicle with front wheels in straight-ahead position, then SFIA0793E stop. 8. Select ATA MONITOR, ECU INPUT SIGNALS, and STR ANGLE SIG on CONSULT-II screen. Then make sure STR ANGLE SIG is within 0±2.5. If value is more than specification, repeat steps 1 to Erase memory of ABS actuator and electric unit (control unit) and ECM. ABS actuator and electric unit (control unit): Refer to BRC-23, "ERASE MEMORY". ECM: Refer to EC-100, "TROUBLE IAGNOSIS" (VQ35E), EC-811, "TROUBLE IAGNOSIS" (VK45E). 10. Turn ignition switch OFF. NFS000Q4 BRC-6

7 SYSTEM ESCRIPTION System iagram SYSTEM ESCRIPTION PFP:00000 NFS000Q5 A B C E BRC G H I 1. Electric line 2. Brake hydraulic line 3. ECM 4. TCM 5. Steering angle sensor 6. Warning lamp, indicator lamp (combination meter) 7. AW control unit (AW model) Function ABS Anti-Lock Brake System is a function that detects wheel revolution while braking, electronically controls braking force, and prevents wheel locking during sudden braking. It improves handling stability and maneuverability for avoiding obstacles. Electrical system diagnosis by CONSULT-II is available. EB Electronic Brake force istribution is a following function. ABS actuator and electric unit (control unit) detects subtle slippages between the front and rear wheels during braking. Then it electronically controls the rear braking force (brake fluid pressure) to reducing and reduces rear wheel slippage. Accordingly it improves vehicle stability. Electrical system diagnosis by CONSULT-II is available. TCS Traction Control System is a function that electronically controls engine torque, brake fluid pressure and A/T gear position to ensure the optimum slippage ratio at drive wheels by computing wheel speed signals 8. ICC sensor integrated unit (with ICC) BRC-7 9. RAS control unit (with RAS) SFIA2722J 10. Injector operation signal 11. CAN communication 12. Front RH wheel sensor 13. Front LH wheel sensor 14. Master cylinder 15. ABS actuator and electric unit (control unit) 16. VC OFF switch 17. Yaw rate/side G sensor 18. Rear RH wheel sensor 19. Rear LH wheel sensor NFS000Q6 J K L M

8 SYSTEM ESCRIPTION from 4 wheel sensors. When ABS actuator and electric unit (control unit) detects a spin at drive wheels (rear wheels), it compares wheel speed signals from all 4 wheels. At this time, LH and RH rear brake fluid pressure are controlled, while fuel being cut to engine and throttle valve being closed to reduce engine torque by the control unit. Further more, throttle position is continuously controlled to ensure the optimum engine torque at all times. uring TCS operation, it informs driver of system operation by flashing SLIP indicator lamp. Electrical system diagnosis by CONSULT-II is available. VC Vehicle ynamics Control system detects driver's steering operation amount and brake pedal travel from steering angle sensor and pressure sensor. Using information from yaw rate/side G sensor and wheel sensor, VC judges driving condition (conditions of under steer and over steer) to improve vehicle driving stability by controlling brake application to 4 wheels and engine output. uring VC operation, it informs driver of system operation by flashing SLIP indicator lamp. Electrical system diagnosis by CONSULT-II is available. EC Receives deceleration degree commandment value signal from ICC sensor integrated unit, and controls brake fluid pressure with the motor (built-in ABS actuator and electric unit (control unit)). Operation That Is Not "System Error" ABS When starting engine or just after starting vehicle, brake pedal may vibrate or the motor operating sound may be heard from engine room. This is a normal states of the operation check. uring ABS operation, brake pedal lightly vibrates and a mechanical sound may be heard. This is normal. Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough, gravel, or snow-covered (fresh, deep snow) roads. TCS epending on road circumstances, driver may have a sluggish feel. This is normal, because optimum traction has highest priority under TCS operation. When vehicle is passing through a road where surface friction varies, downshifting or depressing accelerator pedal fully may activate TCS temporarily. VC uring VC operation, body and brake pedal lightly vibrate and mechanical sounds may be heard. This is normal. If vehicle is rotated on turn table, or rolled and rocked on ship, ABS warning lamp, VC OFF indicator lamp, and SLIP indicator lamp may turn on. In this case, start engine on normal road again. If ABS warning lamp, VC OFF indicator lamp, and SLIP indicator lamp turn off after restart, it is normal. When starting TCS or VC under rapid acceleration or hard turn, operating sound by brake pedal is generated. However, this is not malfunction. This is because TCS and VC are functioning normally. VC may not operate normally or ABS warning lamp, VC OFF indicator lamp and SLIP indicator lamp may turn on when driving special roads with extremely steep slant (banks on circuit road and so on.) However, it is not malfunction when returning to a normal state after restarting the engine. In that case, be sure to erase the memory of self-diagnosis. Refer to BRC-23, "ERASE MEMORY". Yaw rate /side G sensor malfunction may occur under hard turn like spin turn, rapid acceleration turn, drift run, etc., when VC function is OFF (VC OFF switch is turned on). It is not malfunction if it is possible to return to a normal position after restarting engine. Then erase the memory of self-diagnosis. Refer to BRC-23, "ERASE MEMORY". VC OFF indicator lamp and SLIP indicator lamp may simultaneously turn on when low tire pressure warning lamp turns on. This is not a VC system error but results from characteristic change of tires. Fail-Safe Function ABS, EB SYSTEM In the event there is a malfunction with the electrical system, the ABS warning lamp, VC OFF indicator lamp, and SLIP indicator lamp will turn on when it is the ABS that is malfunctioning, and the brake warning lamp, ABS warning lamp, VC OFF indicator lamp, and SLIP indicator lamp will turn on when it is the EB that is NFS000Q7 NFS000Q8 BRC-8

9 SYSTEM ESCRIPTION malfunctioning. At the same time, the VC/TCS/ABS will be put in one of the following states by the fail-safe function. When the ABS malfunctions, only the EB operates. The condition is the same as that of models without VC/TCS/ABS. NOTE: In step 1 shown above, self-diagnosis is performed when ignition switch is turned ON and when vehicle initially starts. ABS self-diagnosis sound may be heard as usual. When the EB malfunctions, the EB and ABS will not operate. The condition is the same as that of models without VC/TCS/ABS and EB. VC / TCS In case of VC/TCS system malfunction, the VC OFF indicator lamp and SLIP indicator lamp or only VC OFF indicator lamp are turned on, and the condition of the vehicle is the same as the condition of vehicles without VC/TCS equipment. In case of electrical malfunction with the VC/TCS system, the ABS control continues to operate normally even though VC/TCS does not operate. CAUTION: If the Fail-Safe function is activated, then perform self-diagnosis for VC/TCS/ABS control system. Hydraulic Circuit iagram NFS000Q9 A B C E BRC G H I J K L M SFIA3049E BRC-9

10 CAN COMMUNICATION System escription CAN COMMUNICATION PFP:23710 CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only. Refer to LAN-34, "CAN Communication Unit". NFS000QA BRC-10

11 TROUBLE IAGNOSIS How to Perform Trouble iagnoses TROUBLE IAGNOSIS PFP:00004 BASIC CONCEPT The most important point to perform trouble diagnosis is to understand systems (control and mechanism) in vehicle thoroughly. NFS000QB A B It is also important to clarify customer complaints before inspection. First of all, reproduce symptom, and understand it fully. Ask customer about his/her complaints carefully. In some cases, they will be necessary to check symptom by driving vehicle with customer. CAUTION: Customers are not professionals. o not assume maybe customer means... or maybe customer mentioned this symptom. C E It is essential to check symptoms right from beginning in order to repair a malfunction completely. For an intermittent malfunction, it is important to reproduce symptom based on interview with customer and past examples. o not perform inspection on ad hoc basis. Most intermittent malfunctions are caused by poor contacts. In this case, it will be effective to shake suspected harness or connector by hand. When repairs are performed without any symptom check, no one can judge if malfunction has actually been eliminated. After diagnostic, make sure to perform ERASE MEMORY. Refer to BRC-23, "ERASE MEMORY". Always read GI General Information to confirm general precautions. Refer to GI-4, "General Precautions". SEF234G SEF233G BRC G H I J K L M BRC-11

12 IAGNOSIS FLOW CHART TROUBLE IAGNOSIS SFIA3072E BRC-12

13 TROUBLE IAGNOSIS ASKING COMPLAINTS Complaints against malfunction vary depending on each person. It is important to clarify customer complaints. Ask customer about what symptoms are present and under what conditions. Use information to reproduce symptom while driving. It is also important to use diagnostic sheet so as not to miss information. A B C EXAMPLE OF IAGNOSIS WORKSHEET SBR339B E BRC G H I J K L M SFIA0791E BRC-13

14 Component Parts Location TROUBLE IAGNOSIS NFS000QC 1. Front wheel sensor 2. ABS actuator and electric unit (control unit) 3. Warning lamp, Indicator lamp (Combination meter) 4. VC OFF switch 5. Steering angle sensor 6. Rear wheel sensor 7. Yaw rate/side G sensor SFIA3017E BRC-14

15 Schematic TROUBLE IAGNOSIS NFS000Q A B C E BRC G H I J K L M TFWT0260E BRC-15

16 Wiring iagram VC TROUBLE IAGNOSIS NFS000QE TFWT0261E BRC-16

17 TROUBLE IAGNOSIS A B C E BRC G H I J K L M TFWT0262E BRC-17

18 TROUBLE IAGNOSIS TFWT0263E BRC-18

19 TROUBLE IAGNOSIS A B C E BRC G H I J K L M TFWT0264E BRC-19

20 TROUBLE IAGNOSIS TFWT0265E BRC-20

21 TROUBLE IAGNOSIS A B C E BRC G H I J K L M TFWT0266E BRC-21

22 CONSULT-II Functions (ABS) TROUBLE IAGNOSIS CONSULT-II MAIN FUNCTION In a diagnosis function (main function), there are WORK SUPPORT, SELF-IAG RESULTS, ATA MONI- TOR, CAN IAG SUPPORT MNTR, ACTIVE TEST, FUNCTION TEST, ECU PART NUMBER. iagnostic test mode Function Reference WORK SUPPORT This mode enables a technician to adjust some devices faster and more accurately by following the indications on CONSULT-II. CONSULT-II BASIC OPERATION PROCEURE 1. Touch "ABS in the SELECT SYSTEM screen. NFS000QF BRC-6, "Adjustment of Steering Angle Sensor Neutral Position" SELF-IAG RESULTS Self-diagnostic results can be read and erased quickly. BRC-23, "Self-iagnosis" ATA MONITOR CAN IAG SUPPORT MNTR ACTIVE TEST FUNCTION TEST Input/Output data in the ABS actuator and electric unit (control unit) can be read. The results of transmit/receive diagnosis of communication can be read. iagnostic Test Mode in which CONSULT-II drives some actuators apart from the ABS actuator and electric unit (control unit) and also shifts some parameters in a specified range. Performed by CONSULT-II instead of a technician to determine whether each system is OK or NG. BRC-27, "ata Monitor" LAN-20, "CAN iagnostic Support Monitor" BRC-30, "Active Test" Separate volume CONSULT- II OPERATION MANUAL (FUNCTION TEST) ECU PART NUMBER ABS actuator and electric unit (control unit) part number can be read. SFIA2904E 2. Select the required diagnosis location from the SELECT IAG MOE screen. For further details, refer to the separate volume CONSULT-II OPERATION MANUAL. SFIA3071E BRC-22

23 Self-iagnosis TROUBLE IAGNOSIS NFS000QG OPERATION PROCEURE 1. Turn ignition switch OFF. 2. Connect CONSULT-II and CONSULT-II CONVERTER to data link connector. CAUTION: If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be detected in self-diagnosis depending on control unit which performs CAN communication. 3. Turn ignition switch ON. 4. Start engine and drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute. 5. After stopping vehicle, with the engine running, touch START (NISSAN BASE VHCL), ABS, SELF- IAG RESULTS in order on the CONSULT-II screen. CAUTION: If START (NISSAN BASE VHCL) is touched immediately after starting engine or turning on the ignition switch, ABS might not be displayed in the SELECT SYSTEM screen. In this case, repeat the operation from step The self-diagnostic results are displayed. (Touch PRINT to print out self-diagnostic results, if necessary.) Check ABS warning lamp, VC OFF indicator lamp and SLIP indicator lamp if NO FAILURE is displayed. Refer to BRC-53, "Inspection 19: Warning Lamp and Indicator Lamp Circuit". 7. Perform the appropriate inspection from display item list, and repair or replace the malfunctioning component.refer to BRC-24, "ISPLAY ITEM LIST". 8. Start engine and drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute. CAUTION: When the wheel sensor malfunctions, after inspecting the wheel sensor system, the ABS warning lamp, VC OFF indicator lamp, SLIP indicator lamp and brake warning lamp will not turn off even when the system is normal unless the vehicle is driving at approximately 30 km/h (19 MPH) or more for approximately 1 minute. ERASE MEMORY 1. Turn ignition switch OFF. 2. Start engine and touch START (NISSAN BASE VHCL), ABS, SELF-IAG RESULTS, ERASE MEMORY in order on the CONSULT-II screen to erase the diagnostic memory. If ABS is not indicated, go to GI-40, "CONSULT-II ata Link Connector (LC) Circuit". CAUTION: If the diagnostic memory is not erased, re-perform the operation from step Perform self-diagnosis again, and make sure that diagnostic memory is erased. 4. rive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute as the final inspection, and make sure that the ABS warning lamp, VC OFF indicator lamp, SLIP indicator lamp and brake warning lamp turn off. NOTE: Brake warning lamp will turn on in case of parking brake operation (when switch is ON) or of brake fluid level switch operation (when brake fluid is insufficient). VC OFF switch should not stay "ON" position. A B C E BRC G H I J K L M BRC-23

24 ISPLAY ITEM LIST TROUBLE IAGNOSIS Code isplay item Malfunction detecting condition Check item C1101 C1102 C1103 C1104 C1105 C1106 C1107 RR RH SENSOR-1 RR LH SENSOR-1 FR RH SENSOR-1 FR LH SENSOR-1 RR RH SENSOR-2 RR LH SENSOR-2 FR RH SENSOR-2 C1108 FR LH SENSOR- 2 C1109 C1110 C1111 C1114 C1115 BATTERY VOLTAGE [ABNORMAL] CONTROLLER FAILURE PUMP MOTOR MAIN RELAY ABS SENSOR [ABNORMAL SIGNAL] Circuit of rear RH wheel sensor is open. Or when the sensor power voltage is outside the standard. Circuit of rear LH wheel sensor is open. Or when the sensor power voltage is outside the standard. Circuit of front RH wheel sensor is open. Or when the sensor power voltage is outside the standard. Circuit of front LH wheel sensor is open. Or when the sensor power voltage is outside the standard. When the circuit in the rear RH wheel sensor is short-circuited. Or when the distance between the wheel sensor and sensor rotor is too large and the sensor pulse cannot be recognized by the control unit. When the circuit in the rear LH wheel sensor is short-circuited. Or when the distance between the wheel sensor and sensor rotor is too large and the sensor pulse cannot be recognized by the control unit. When the circuit in the front RH wheel sensor is short-circuited. Or when the distance between the wheel sensor and sensor rotor is too large and the sensor pulse cannot be recognized by the control unit. When the circuit in the front LH wheel sensor is short-circuited. Or when the distance between the wheel sensor and sensor rotor is too large and the sensor pulse cannot be recognized by the control unit. When the ABS actuator and electric unit (control unit) power supply voltage is lower than normal. When there is an internal malfunction in the ABS actuator and electric unit (control unit). uring the actuator motor operating with ON, when the actuator motor turns OFF, or when the control line for actuator motor relay is open. uring the actuator motor operating with OFF, when the actuator motor turns ON, or when the control line for relay is shorted to ground. uring the actuator relay operating with OFF, when the actuator relay turns ON. Or when the control line for the relay is shorted to the ground. uring the actuator relay operating with ON, when the actuator relay turns OFF, or when the control line for the relay is open. When wheel sensor input signal is malfunctioning. BRC-34, "Inspection 1: Wheel Sensor Circuit" (Note 1) BRC-37, "Inspection 4: ABS Actuator and Electric Unit (Control Unit) Power Supply and Ground Circuit" BRC-36, "Inspection 3: ABS Actuator and Electric Unit (Control Unit)" BRC-38, "Inspection 5: ABS Motor and Motor Relay Circuit" BRC-40, "Inspection 6: Solenoid, VC Change-Over Valve and Actuator Relay Circuit" BRC-34, "Inspection 1: Wheel Sensor Circuit" (Note 1) BRC-24

25 TROUBLE IAGNOSIS Code isplay item Malfunction detecting condition Check item C1116 STOP LAMP SW When stop lamp switch circuit is open. C1118 4W SYSTEM When AW control unit is malfunctioning. C1120 C1121 C1122 C1123 C1124 C1125 C1126 C1127 FR LH IN ABS SOL FR LH OUT ABS SOL FR RH IN ABS SOL FR RH OUT ABS SOL RR LH IN ABS SOL RR LH OUT ABS SOL RR RH IN ABS SOL RR RH OUT ABS SOL C1130 ENGINE SIGNAL 1 C1131 ENGINE SIGNAL 2 C1132 ENGINE SIGNAL 3 C1133 ENGINE SIGNAL 4 C1136 ENGINE SIGNAL 6 When the control unit detects a malfunction in the front left inlet solenoid circuit. When the control unit detects a malfunction in the front left outlet solenoid circuit. When the control unit detects a malfunction in the front right inlet solenoid circuit. When the control unit detects a malfunction in the front right outlet solenoid circuit. When the control unit detects a malfunction in the rear left inlet solenoid circuit. When the control unit detects a malfunction in the rear left outlet solenoid circuit. When the control unit detects a malfunction in the rear right inlet solenoid circuit. When the control unit detects a malfunction in the rear right outlet solenoid circuit. Major engine components are malfunctioning. C1137 RAS CIRCUIT When RAS control unit is malfunctioning. C1142 C1143 C1144 C1145 C1146 PRESS SEN CIRCUIT ST ANG SEN CIRCUIT ST ANG SEN SIGNAL YAW RATE SENSOR SIE G-SEN CIRCUIT Pressure sensor signal line is open or shorted, or pressure sensor is malfunctioning. Neutral position of steering angle sensor is dislocated, or the steering angle sensor is malfunctioning. Neutral position correction of steering angle sensor is not finished. Yaw rate sensor is malfunctioning, or the yaw rate sensor signal line is open or shorted. Side G sensor is malfunctioning, or circuit of side G sensor is open or shorted. BRC-44, "Inspection 10: Stop Lamp Switch Circuit" BRC-50, "Inspection 15: AW Control Unit Circuit (AW Model)" BRC-40, "Inspection 6: Solenoid, VC Change-Over Valve and Actuator Relay Circuit" BRC-36, "Inspection 2: Engine System" BRC-49, "Inspection 13: RAS Control Unit Circuit (With RAS)" BRC-41, "Inspection 7: Pressure Sensor Circuit" BRC-41, "Inspection 8: Steering Angle Sensor Circuit" BRC-6, "Adjustment of Steering Angle Sensor Neutral Position" BRC-45, "Inspection 11: Yaw Rate/Side G Sensor Circuit" A B C E BRC G H I J K L M BRC-25

26 TROUBLE IAGNOSIS Code isplay item Malfunction detecting condition Check item C1147 C1148 C1149 C1150 C1153 C1154 C1155 C1156 USV LINE [FL-RR] USV LINE [FR-RL] HSV LINE [FL-RR] HSV LINE [FR-RL] EMERGENCY BRAKE PNP POS SIG BR FLUI LEVEL LOW ST ANG SEN COM CIR VC switch-over solenoid valve (USV1) on the primary side is open circuit or shorted, or the control line is open or shorted to the power supply or the ground. VC switch-over solenoid valve (USV2) on the secondary side is open circuit or shorted, or the control line is open or shorted to the power supply or the ground. VC switch-over solenoid valve (HSV1) on the primary side is open circuit or shorted, or the control line is open or shorted to the power supply or the ground. VC switch-over solenoid valve (HSV2) on the secondary side is open circuit or shorted, or the control line is open or shorted to the power supply or the ground. When ABS actuator and electric unit (control unit) is malfunctioning. (pressure increase is too much or too little) TCM or ABS actuator and electric unit (control unit) internal malfunction. Brake fluid level is low or communication line between the ABS actuator and electric unit (control unit) and brake fluid level switch is open or shorted. CAN communication circuit or steering angle sensor is malfunctioning. C1170 VARIANT COING In a case where VARIANT COING is different. C1185 ACC CONT ICC sensor integrated unit internal malfunction. U1000 CAN COMM CIRCUIT When there is a malfunction in the CAN communication circuit. U1100 ACC COMM CIRCUIT When there is a malfunction in the CAN communication circuit or ICC sensor integrated unit. BRC-40, "Inspection 6: Solenoid, VC Change-Over Valve and Actuator Relay Circuit" BRC-36, "Inspection 3: ABS Actuator and Electric Unit (Control Unit)" BRC-43, "Inspection 9: Park/Neutral Position (PNP) Switch Circuit" BRC-48, "Inspection 12: Brake Fluid Level Switch Circuit" BRC-51, "Inspection 16: CAN Communication Circuit" BRC-36, "Inspection 3: ABS Actuator and Electric Unit (Control Unit)" BRC-50, "Inspection 14: ICC Sensor Integrated Unit Circuit (With ICC)" BRC-51, "Inspection 16: CAN Communication Circuit" (Note 2) BRC-51, "Inspection 16: CAN Communication Circuit" Note 1: After completing repairs of shorted sensor circuit, when ignition switch is turned ON, ABS warning lamp turns on. Make sure that ABS warning lamp turns off while driving vehicle at 30 km/h (19 MPH) or more for approximately 1 minute according to self-diagnosis procedure. In addition, if wheel sensor 2 is displayed for wheels, check wheel sensor circuit and also check control unit power voltage. Note 2: When malfunctions are detected in several systems, including CAN communication circuit [U1000], troubleshoot CAN communication circuit. Refer to BRC-51, "Inspection 16: CAN Communication Circuit". BRC-26

27 ata Monitor TROUBLE IAGNOSIS NFS000QH OPERATION PROCEURE 1. Touch START (NISSAN BASE VHCL), ABS, ATA MONITOR in order on CONSULT-II screen. CAUTION: When START (NISSAN BASE VHCL) is touched immediately after starting engine or turning on the ignition switch, ABS might not be displayed in the system selection screen. In this case, repeat the operation from step At the monitor item selection screen, touch one of the items ECU INPUT SIGNALS, MAIN SIGNALS or SELECTION FROM MENU. 3. Touch START to proceed to the data monitor screen. ISPLAY ITEM LIST CAUTION: The display shows the control unit calculation data, so a normal value might be displayed even in the event the output circuit (harness) is open or short - circuited. SELECT MONITOR ITEM E, M, S Monitor item FR LH SENSOR FR RH SENSOR RR LH SENSOR RR RH SENSOR Wheel speed E: ECU INPUT SIGNALS M: MAIN SIGNALS S: SELECTION FROM MENU isplay content E, M, S STOP LAMP SW Brake pedal operation E, M, S BATTERY VOLT Battery voltage supplied to the ABS actuator and electric unit (control unit) E, M, S GEAR Gear position determined by TCM E, M, S SLCT LVR POSI A/T shift position E, M, S OFF SW VC OFF switch ON/OFF E, M, S YAW RATE SEN E, M, S 4W MOE MON (Note 2) E, S ACCEL POS SIG Yaw rate detected by yaw rate/side G sensor Condition ata monitor Reference value in normal operation 0 [km/h] Vehicle stopped Nearly matches the speed meter display (± 10 % or less) When brake pedal is depressed When brake pedal is not depressed Ignition switch ON 1st gear 2nd gear 3rd gear 4th gear 5th gear P position R position N position position VC OFF switch ON (When VC OFF indicator lamp is ON) VC OFF switch OFF (When VC OFF indicator lamp is OFF) When vehicle stop When vehicle turning Vehicle running (Note 1) ON OFF V P R N ON OFF Approx. 0 d/s (-75 to 75 d/s) AW activated Engine running AUTO Throttle actuator opening/closing is displayed (linked with accelerator pedal) Accelerator pedal not depressed (ignition switch is ON) epress accelerator pedal (ignition switch is ON) 0 % % A B C E BRC G H I J K L M BRC-27

28 TROUBLE IAGNOSIS E: ECU INPUT SIGNALS M: MAIN SIGNALS S: SELECTION FROM MENU SELECT MONITOR ITEM Monitor item isplay content Condition ata monitor Reference value in normal operation Vehicle stopped Approx. 0 m/s 2 E, S SIE G-SENSOR E, S STR ANGLE SIG E, S PRESS SENSOR Transverse G detected by side G sensor Steering angle detected by steering angle sensor Brake fluid pressure detected by pressure sensor E, S ENGINE RPM With engine running E, S FLUI LEV SW Brake fluid level switch E, S PARK BRAKE SW Parking brake switch M, S FR RH IN SOL FR RH OUT SOL FR LH IN SOL FR LH OUT SOL RR RH IN SOL RR RH OUT SOL RR LH IN SOL RR LH OUT SOL Operation status of all solenoid valve M, S MOTOR RELAY Motor and motor relay operation M, S ACTUATOR RLY (Note 3) M, S ABS WARN LAMP M, S OFF LAMP Actuator relay operation ABS warning lamp (Note 4) VC OFF indicator lamp (Note 4) Vehicle turning right Vehicle turning left Negative value (m/s 2 ) Positive value (m/s 2 ) Straight-ahead Approx. 0 Steering wheel turned 720 to 720 With ignition switch turned ON and brake pedal released With ignition switch turned ON and brake pedal depressed With engine stopped Engine running When brake fluid level switch ON When brake fluid level switch OFF Parking brake switch is active Parking brake switch is inactive Actuator (solenoid valve) is active ( ACTIVE TEST with CONSULT-II) or actuator relay is inactive (in failsafe mode) When the actuator (solenoid valve) is not active and actuator relay is active (ignition switch ON) When the motor relay and motor are operating When the motor relay and motor are not operating When the actuator relay is operating When the actuator relay is not operating When ABS warning lamp is ON When ABS warning lamp is OFF When VC OFF indicator lamp is ON When VC OFF indicator lamp is OFF Approx. 0 bar 40 to 300 bar 0 rpm Almost in accordance with tachometer display ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF BRC-28

29 TROUBLE IAGNOSIS SELECT MONITOR ITEM M, S SLIP LAMP S 4W FAIL REQ (Note 2) SLIP indicator lamp (Note 4) AW control unit fail-safe signal When SLIP indicator lamp is ON When SLIP indicator lamp is OFF When AW control unit is fail-safe mode When AW control unit is normal When snow mode switch is ON ON S SNOW MOE SW Snow mode switch When snow mode switch is OFF OFF S BST OPER SIG Not applied but displayed OFF S M-MOE SIG Manual mode activated S EB SIGNAL EB operation S ABS SIGNAL ABS operation S TCS SIGNAL TCS operation S VC SIGNAL VC operation S EB FAIL SIG EB fail-safe signal S ABS FAIL SIG ABS fail-safe signal S TCS FAIL SIG TCS fail-safe signal S VC FAIL SIG VC fail-safe signal S CRANKING SIG Crank operation S Monitor item USV HSV (FL-RR, FR-RL) (Note 3) VC switch-over valve E: ECU INPUT SIGNALS M: MAIN SIGNALS S: SELECTION FROM MENU isplay content Condition When the manual mode is active When the manual mode is inactive EB is active EB is inactive ABS is active ABS is inactive TCS is active TCS is inactive VC is active VC is inactive In EB fail-safe EB is normal In ABS fail-safe ABS is normal In TCS fail-safe TCS is normal In VC fail-safe VC is normal Crank is active Crank is inactive ata monitor When actuator (switchover valve) is active ( ACTIVE TEST with CONSULT-II) or actuator relay is inactive (when in fail-safe mode) When actuator (switchover valve) is not active and actuator relay is active (ignition switch ON) Reference value in normal operation ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF A B C E BRC G H I J K L M BRC-29

30 TROUBLE IAGNOSIS SELECT MONITOR ITEM S S Note 1: Confirm tire pressure is normal. Note 2: Only AW model. Note 3: A brief moment of ON/OFF condition occurs every 20 seconds after ignition switch turned ON. This is not malfunction because it is an operation for checking. Note 4: On and off timing for warning lamp and indicator lanp.refer to BRC-33, "ON and OFF Timing for Warning Lamp and Indicator Lamp". Active Test Monitor item V/R OUTPUT (Note 3) M/R OUTPUT E: ECU INPUT SIGNALS M: MAIN SIGNALS S: SELECTION FROM MENU isplay content Solenoid valve relay activated Actuator motor and motor relay activated Condition ata monitor When the solenoid valve relay is active (When ignition switch OFF) When the solenoid valve relay is not active (in the fail-safe mode) When the actuator motor and motor relay are active ( ACTIVE TEST with CONSULT-II) When the actuator motor and motor relay are inactive Reference value in normal operation CAUTION: o not perform active test while driving vehicle. Make sure to completely bleed air from brake system. The active test cannot be performed with the ABS warning lamp, VC indicator lamp, SLIP indicator lamp and brake warning lamp are on. ABS warning lamp, VC OFF indicator lamp, SLIP indicator lamp and brake warning lamp are on during active test. Erase memory of ICC system after implementing active test. Refer to ACS-34, "Self-iagnostic Function". OPERATION PROCEURE 1. Touch START (NISSAN BASE VHCL), ABS, ACTIVE TEST in order on the CONSULT-II screen. CAUTION: When START (NISSAN BASE VHCL) is touched immediately after starting engine or turning on ignition switch, ABS might not be displayed in the "SELECT SYSTEM" screen. In this case, repeat the operation from step Touch SELECT TEST ITEM is displayed. 3. Touch necessary test item. ON OFF ON OFF NFS000QI SFIA0591E 4. While MAIN SIGNALS indication is inverted, touch START. 5. ACTIVE TEST screen will be displayed so perform the following test. BRC-30

31 TROUBLE IAGNOSIS NOTE: When active test is performed while depressing the pedal, the pedal depression amount will change. This is normal. (Only solenoid valve and ABS motor) TEST IS STOPPE is displayed 10 seconds after operation start. After TEST IS STOPPE is displayed, to perform test again, touch BACK and repeat step 3. TEST ITEMS Solenoid Valve NOTE: The example shown is for front right wheel. The procedure for the other wheels is the same as given below. When performing an active test of the ABS function, select the "MAIN SIGNALS" for each test item.in addition, when performing an active test of the VC/TCS function, select the item menu for each test item. For ABS solenoid valve, touch UP, KEEP, and OWN on the display screen. For ABS solenoid valve (ACT), touch UP, ACT UP, ACT KEEP and confirm that solenoid valves (IN, OUT, USV, HSV) operate as shown in the table below. A B C E BRC *: ON for 1 to 2 seconds after the touch, and then OFF Note: A brief moment of ON/OFF condition occurs every 20 seconds after ignition switch turned ON. This is not malfunction because it is an operation for checking. ABS Motor Touch ON and OFF on screen. Make sure motor relay and actuator relay operates as shown in table below. Note: A brief moment of ON/OFF condition occurs every 20 seconds after ignition switch turned ON. This is not malfunction because it is an operation for checking. SFIA0678E Operation ABS solenoid valve ABS solenoid valve (ACT) (Note) UP KEEP OWN UP ACT UP ACT KEEP FR RH IN SOL OFF ON ON OFF OFF OFF FR RH OUT SOL OFF OFF ON* OFF OFF OFF USV [FR-RL] OFF OFF OFF OFF ON ON HSV [FR-RL] OFF OFF OFF OFF ON* OFF Operation ON OFF MOTOR RELAY ON OFF ACTUATOR RLY (Note) ON ON G H I J K L M SFIA0593E BRC-31

32 For Fast and Accurate iagnosis TROUBLE IAGNOSIS PRECAUTIONS FOR IAGNOSIS Before performing diagnosis, always read General Information (GI) to confirm general precautions. Refer to GI-4, "General Precautions". If steering angle sensor, steering system parts, suspension system parts, ABS actuator and electric unit (control unit) or tires have been replaced, or if wheel alignment has been adjusted, be sure to adjust neutral position of steering angle sensor before driving. Refer to BRC-6, "Adjustment of Steering Angle Sensor Neutral Position". After diagnosis is finished, be sure to erase memory. Refer to BRC-23, "ERASE MEMORY". When checking continuity and voltage between unit, be sure to check for disconnection, looseness, bend, or collapse of connector terminals. If any malfunction is found, repair or replace connector terminals. For intermittent symptoms, possible cause is malfunction in harness, harness connector, or terminals. Move harness, harness connector, and terminals to check for poor connections. If a circuit tester is used for the check, be careful not to forcibly extend any connector terminal. The following symptoms may be caused by normal operations. Symptom Symptom description Result Motor operation sound System operation check sound VC/TCS operation (SLIP indicator lamp ON) ABS operation (Longer stopping distance) Insufficient feeling of acceleration This is sound of motor inside VC actuator. Slight sound may occur during VC, TCS, and ABS operation. Just after engine starts, the motor operating sound may be heard. This is a normal condition of the system operation check. When engine starts, slight click sound may be heard from engine room. This is normal and is part of system operation check. TCS may activate momentarily if wheel speed changes when driving over location where friction varies, when downshifting, or when fully depressing accelerator pedal. When checking speed meter etc. with a 2-wheel-drive chassis dynamometer, vehicle speed is not increased by pressing down on the accelerator. On roads with low friction, such as snowy roads or gravel roads, vehicles with ABS may require a longer stopping distance. Therefore, when driving on such roads, avoid overconfidence and keep speed sufficiently low. epending on road conditions, driver may feel that feeling of acceleration is insufficient. This is because traction control, which controls engine and brakes to achieve optimal traction, has the highest priority (for safety). As a result, there may be times when acceleration is slightly less than usual for the same accelerator pedal operation. Normal Normal Normal Cancel the VC/TCS function for the inspection on a chassis dynamometer. Normal Normal NFS000QJ BRC-32

33 Basic Inspection TROUBLE IAGNOSIS BASIC INSPECTION 1: BRAKE FLUI LEVEL, LEAK INSPECTION AN BRAKE PA 1. Check fluid level in brake reservoir tank. If fluid level is low, refill brake fluid. Refer to BR-10, "CHECKING BRAKE FLUI LEVEL". 2. Check for leakage in brake tubes or hoses and around ABS actuator and electric unit (control unit). If there is leaking or seeping fluid, check the following items. If the brake tube connections at ABS actuator and electric unit (control unit) are loose, tighten flare nuts to the specified torque. Then inspect again and confirm that there is no leakage. If flare nuts or screws of ABS actuator and electric unit (control unit) are damaged and loose, replace damaged parts. Then inspect again and confirm that there is no leakage. If there is leakage at any location other than ABS actuator and electric unit (control unit) connections, wipe away leakage with clean cloth. Then inspect again and confirm that there is no leakage. If there is leakage from ABS actuator and electric unit (control unit), wipe away leakage with clean cloth. Then inspect again. If there is still leakage, replace ABS actuator and electric unit (control unit). CAUTION: ABS actuator and electric unit (control unit) cannot be disassembled. 3. Check brake disc rotor and pads. Refer to BR-28, "ISC ROTOR INSPECTION" (front disc rotor), BR-23, "PA WEAR INSPECTION" (front brake pad), BR-34, "ISC ROTOR INSPECTION" (rear disc rotor), BR- 29, "PA WEAR INSPECTION" (rear brake pad). BASIC INSPECTION 2: LOOSENESS OF POWER SYSTEM TERMINALS AN BATTERY Check battery for looseness on battery positive/negative terminals and ground connection. Also make sure battery voltage does not drop and alternator is normal. BASIC INSPECTION 3: ABS WARNING LAMP, BRAKE WARNING LAMP, VC OFF INICATOR LAMP AN SLIP INICATOR LAMP ON and OFF Timing for Warning Lamp and Indicator Lamp : ON : OFF Condition ABS warning lamp VC OFF indicator lamp SLIP indicator lamp NFS000QK Brake warning lamp [Note1] Ignition SW OFF For 1 second after turning ON ignition switch 1 second later after turning ON ignition switch VC OFF switch turned ON. (VC function is OFF.) VC/TCS function is malfunctioning. [Note 2] [Note 2] ABS function is malfunctioning. EB function is malfunctioning. A B C E BRC G H I J K L M Note1: Brake warning lamp will turn on in case of parking brake operation (when switch is ON) or of brake fluid level switch operation (when brake fluid is insufficient). Note2: After starting engine, brake warning lamp is turned off. Check the following items when unsuitable for an above condition. ABS warning lamp: BRC-51, "Inspection 16: CAN Communication Circuit" Brake warning lamp: BRC-51, "Inspection 16: CAN Communication Circuit", BRC-48, "Inspection 12: Brake Fluid Level Switch Circuit", BRC-52, "Inspection 18: Parking Brake Switch Circuit" VC OFF indicator lamp:brc-51, "Inspection 16: CAN Communication Circuit", BRC-51, "Inspection 17: VC OFF Switch Circuit" SLIP indicator lamp: BRC-51, "Inspection 16: CAN Communication Circuit" If malfunction is not found, refer to BRC-53, "Inspection 19: Warning Lamp and Indicator Lamp Circuit". BRC-33

34 Inspection 1: Wheel Sensor Circuit CAUTION: o not check between wheel sensor terminals. INSPECTION PROCEURE 1. CHECK SELF-IAGNOSIS RESULTS TROUBLE IAGNOSIS NFS000QL Check the self-diagnosis results. Self-diagnosis results FR RH SENSOR-1, -2 FR LH SENSOR-1, -2 RR RH SENSOR-1, -2 RR LH SENSOR-1, -2 ABS SENSOR [ABNORMAL SIGNAL] Is above displayed on the self-diagnosis display? YES >> GO TO 2. NO >> INSPECTION EN 2. CHECK TIRE Check air pressure, wear and size. Are air pressure, wear and size within standard? YES >> GO TO 3. NO >> Adjust air pressure, or replace tire. Perform the self-diagnosis, and make sure that the result shows NO TC IS ETECTE. 3. CHECK SENSOR AN SENSOR ROTOR Check sensor rotor for damage. Check wheel sensor for damage, disconnection or looseness. OK >> GO TO 4. NG >> Repair wheel sensor mount or replace sensor rotor. Then perform the self-diagnosis. Perform the self-diagnosis, and make sure that the result shows NO TC IS ETECTE. 4. CHECK CONNECTOR 1. Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector E30 and malfunctioning wheel sensor connector E41(FR-RH), E59(FR-LH), B101(RR-RH), B102(RR-LH). Check terminal to see if it is deformed, disconnected, loose, etc., Repair or replace it if any malfunction condition is found. 2. Reconnect connectors and then perform the self-diagnosis. Refer to BRC-23, "OPERATION PROCE- URE". OK >> INSPECTION EN NG >> GO TO 5. BRC-34

35 TROUBLE IAGNOSIS 5. CHECK WHEEL SENSOR HARNESS 1. Turn ignition switch OFF and disconnect malfunctioning wheel sensor connector E41(FR-RH), E59(FR-LH), B101(RR-RH), B102(RR-LH) and ABS actuator and electric unit (control unit) connector E Check continuity between terminals. (Also check continuity when steering wheel is turned right and left and when sensor harness inside the wheel house is moved.) A B C SFIA3030E Wheel Power supply circuit Signal circuit Ground circuit ABS actuator and electric unit (control unit) Wheel sensor ABS actuator and electric unit (control unit) Wheel sensor ABS actuator and electric unit (control unit) (signal) Front RH , 10 Front LH , 5 Rear RH , 29 Rear LH , 27 Power supply circuit Signal circuit Ground circuit : Yes : Yes : No Ground OK >> GO TO 6. NG >> Repair or replace malfunctioning components. Perform the self-diagnosis, and make sure that the result shows NO TC IS ETECTE. 6. CHECK WHEEL SENSOR 1. Replace wheel sensor that resulted in malfunction by self-diagnosis. 2. Reconnect connectors, drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute, and then perform self-diagnosis. Is above displayed on the self-diagnosis display? OK >> INSPECTION EN NG >> Replace ABS actuator and electric unit (control unit). Perform the self-diagnosis, and make sure that the result shows NO TC IS ETECTE. E BRC G H I J K L M BRC-35

36 Inspection 2: Engine System INSPECTION PROCEURE 1. CHECK SELF-IAGNOSIS RESULTS TROUBLE IAGNOSIS NFS000QM Check self-diagnosis results. Is above displayed on the self-diagnosis display? YES >> GO TO 2. NO >> INSPECTION EN 2. CHECK ENGINE SYSTEM 1. Perform ECM self-diagnosis. Repair or replace items indicated, then perform ECM self-diagnosis again. Refer to EC-100, "TROUBLE IAGNOSIS" (VQ35E), EC-811, "TROUBLE IAGNOSIS" (VK45E). 2. Perform ABS actuator and electric unit (control unit) self-diagnosis. OK >> INSPECTION EN NG >> Repair or replace malfunctioning components. Perform the self-diagnosis, and make sure that the result shows NO TC IS ETECTE. Inspection 3: ABS Actuator and Electric Unit (Control Unit) INSPECTION PROCEURE 1. CHECK SELF-IAGNOSIS RESULTS Check self-diagnosis results. Self-diagnosis results ENGINE SIGNAL 1 ENGINE SIGNAL 2 ENGINE SIGNAL 3 ENGINE SIGNAL 4 ENGINE SIGNAL 6 Self-diagnosis results CONTROLLER FAILURE EMERGENCY BRAKE VARIANT COING NFS000QN CAUTION: Replace ABS actuator and electric unit (control unit) when self-diagnostic result shows items other than those above. Is above displayed on the self-diagnosis display? YES >> Replace ABS actuator and electric unit (control unit). Perform the self-diagnosis, and make sure that the result shows NO TC IS ETECTE. NO >> INSPECTION EN BRC-36

37 TROUBLE IAGNOSIS Inspection 4: ABS Actuator and Electric Unit (Control Unit) Power Supply and Ground Circuit NFS000QO INSPECTION PROCEURE 1. CHECK SELF-IAGNOSIS RESULTS Check self-diagnosis results. Self-diagnosis results BATTERY VOLTAGE [ABNORMAL] Is above displayed on the self-diagnosis display? YES >> GO TO 2. NO >> INSPECTION EN 2. CHECK CONNECTOR 1. Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector E30, check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace terminal. 2. Reconnect connector and perform self-diagnosis. OK >> INSPECTION EN NG >> GO TO CHECK ABS ACTUATOR AN ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY CIRCUIT AN GROUN CIRCUIT 1. Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector E Turn ignition switch ON or OFF and check voltage between ABS actuator and electric unit (control unit) harness connector E30 terminal 28 and ground. A B C E BRC G H I J K L SFIA3032E ABS actuator and electric unit (control unit) Ground Condition Voltage 28 Ignition switch ON Ignition switch OFF Battery voltage (Approx. 12 V) Approx. 0 V M BRC-37

38 TROUBLE IAGNOSIS 3. Turn ignition switch OFF and check continuity between ABS actuator and electric unit (control unit) harness connector E30 terminal 1, 4 and ground. SFIA3033E ABS actuator and electric unit (control unit) Ground Continuity 1, 4 Yes OK >> Check battery for terminal looseness, low voltage, etc. If any malfunction is found, repair malfunctioning parts. Perform the self-diagnosis, and make sure that the result shows NO TC IS ETECTE. NG >> Repair or replace malfunctioning components. Perform the self-diagnosis, and make sure that the result shows NO TC IS ETECTE. Inspection 5: ABS Motor and Motor Relay Circuit INSPECTION PROCEURE 1. CHECK SELF-IAGNOSIS RESULTS Check self-diagnosis results. Self-diagnosis results PUMP MOTOR Is above displayed on the self-diagnosis display? YES >> GO TO 2. NO >> INSPECTION EN 2. CHECK CONNECTOR 1. Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector E30, check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace terminal. 2. Reconnect connector and perform self-diagnosis. OK >> INSPECTION EN NG >> GO TO 3. NFS000QP BRC-38

39 TROUBLE IAGNOSIS 3. CHECK ABS MOTOR AN MOTOR RELAY POWER SUPPLY CIRCUIT 1. Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector E Check voltage between the ABS actuator and electric unit (control unit) harness connector E30 terminal 2 and ground. A B C OK >> GO TO 4. NG >> Repair or replace malfunctioning components. Perform the self-diagnosis, and make sure that the result shows NO TC IS ETECTE. 4. CHECK ABS ACTUATOR AN ELECTRIC UNIT (CONTROL UNIT) GROUN CIRCUIT Check continuity between ABS actuator and electric unit (control unit) harness connector E30 terminal 1, 4 and ground. SFIA3034E ABS actuator and electric unit (control unit) Ground Voltage 2 Battery voltage (Approx. 12 V) E BRC G H I J K ABS actuator and electric unit (control unit) Ground Continuity 1, 4 Yes OK >> Replace ABS actuator and electric unit (control unit). Perform the self-diagnosis, and make sure that the result shows NO TC IS ETECTE. NG >> Repair or replace malfunctioning components. Perform the self-diagnosis, and make sure that the result shows NO TC IS ETECTE. SFIA3033E L M BRC-39

40 TROUBLE IAGNOSIS Inspection 6: Solenoid, VC Change-Over Valve and Actuator Relay Circuit NFS000QQ INSPECTION PROCEURE 1. CHECK SELF-IAGNOSIS RESULTS Check self-diagnosis results. Self-diagnosis results FR RH IN ABS SOL FR RH OUT ABS SOL FR LH IN ABS SOL FR LH OUT ABS SOL RR RH IN ABS SOL RR RH OUT ABS SOL RR LH IN ABS SOL RR LH OUT ABS SOL USV LINE [FL-RR] USV LINE [FR-RL] HSV LINE [FL-RR] HSV LINE [FR-RL] MAIN RELAY Is above displayed on the self-diagnosis display? YES >> GO TO 2. NO >> INSPECTION EN 2. CHECK CONNECTOR 1. Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector E30, check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace terminal. 2. Reconnect connector and perform self-diagnosis. OK >> INSPECTION EN NG >> GO TO CHECK SOLENOI, VC CHANGE-OVER VALVE AN ACTUATOR RELAY POWER SUPPLY CIR- CUIT 1. Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector E Check voltage between ABS actuator and electric unit (control unit) harness connector E30 terminal 3 and ground. SFIA3035E ABS actuator and electric unit (control unit) Ground Voltage 3 Battery voltage (Approx. 12 V) BRC-40

41 TROUBLE IAGNOSIS OK >> GO TO 4. NG >> Repair or replace malfunctioning components. Perform the self-diagnosis, and make sure that the result shows NO TC IS ETECTE. 4. CHECK SOLENOI, VC CHANGE-OVER VALVE, ACTUATOR RELAY GROUN CIRCUIT Check continuity between ABS actuator and electric unit (control unit) harness connector E30 terminal 1, 4 and ground. A B C E ABS actuator and electric unit (control unit) Ground Continuity 1, 4 Yes OK >> Replace ABS actuator and electric unit (control unit). Perform the self-diagnosis, and make sure that the result shows NO TC IS ETECTE. NG >> Repair or replace malfunctioning components. Perform the self-diagnosis, and make sure that the result shows NO TC IS ETECTE. Inspection 7: Pressure Sensor Circuit INSPECTION PROCEURE 1. CHECK SELF-IAGNOSIS RESULTS Check self-diagnosis results. Self-diagnosis results PRESS SEN CIRCUIT Is above displayed on the self-diagnosis display? YES >> Replace ABS actuator and electric unit (control unit). Perform the self-diagnosis, and make sure that the result shows NO TC IS ETECTE. NO >> INSPECTION EN Inspection 8: Steering Angle Sensor Circuit INSPECTION PROCEURE 1. CHECK SELF-IAGNOSIS RESULTS SFIA3033E NFS000QR NFS000QS BRC G H I J K L M Check self-diagnosis results. Self-diagnosis results ST ANG SEN CIRCUIT Is above displayed on the self-diagnosis display? YES >> GO TO 2. NO >> INSPECTION EN BRC-41

42 TROUBLE IAGNOSIS 2. CHECK CONNECTOR 1. Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector E30, check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace terminal. 2. Reconnect connector and perform self-diagnosis. OK >> INSPECTION EN NG >> GO TO CHECK STEERING ANGLE SENSOR HARNESS 1. Check CAN communication system. Refer to BRC-51, "Inspection 16: CAN Communication Circuit". 2. Turn ignition switch OFF and disconnect steering angle sensor connector. 3. Check continuity between steering angle sensor harness connector M47 terminal 2 and ground. SFIA2970E Steering angle sensor Ground Continuity 2 Yes 4. Turn ignition switch ON and check voltage between steering angle sensor harness connector M47 terminal 3 and ground. SFIA2971E Steering angle sensor Ground Voltage 3 Battery voltage (Approx. 12 V) OK >> GO TO 4. NG >> Repair or replace malfunctioning components. Perform the self-diagnosis, and make sure that the result shows NO TC IS ETECTE. BRC-42

43 TROUBLE IAGNOSIS 4. CHECK ATA MONITOR 1. Turn ignition switch OFF and connect the steering angle sensor connector and ABS actuator and electric unit (control unit) connector. 2. Select STR ANGLE SIG in ata Monitor and check steering angle sensor signal. Steering condition STR ANGLE SIG (ata monitor) riving straight 2.5 to Turn 90 to right Approx.+ 90 Turn 90 to left Approx. 90 OK >> Perform self-diagnosis. NG >> Replace spiral cable (steering angle sensor) and adjust neutral position of steering angle sensor. Refer to BRC-6, "Adjustment of Steering Angle Sensor Neutral Position". Perform the self-diagnosis, and make sure that the result shows NO TC IS ETECTE. Inspection 9: Park/Neutral Position (PNP) Switch Circuit INSPECTION PROCEURE 1. CHECK SELF-IAGNOSIS RESULTS Check self-diagnosis results. Self-diagnosis results PNP POSI SIG Is above displayed on the self-diagnosis display? YES >> GO TO 2. NO >> INSPECTION EN 2. CHECK ATA MONITOR Select SLCT LVR POSI in ata Monitor and check Park/Neutral position switch signal. Selector lever position P position R position N position position SLCT LVR POSI (ata monitor) P R N OK >> Replace ABS actuator and electric unit (control unit). Perform the self-diagnosis, and make sure that the result shows NO TC IS ETECTE. NG >> GO TO 3. NFS000QT A B C E BRC G H I J K L M BRC-43

44 TROUBLE IAGNOSIS 3. CHECK PARK/NEUTRAL POSITION (PNP) SWITCH Perform Park/Neutral position switch inspection. Refer to AT-113, "TC P0705 PARK/NEUTRAL POSITION SWITCH". OK >> Replace ABS actuator and electric unit (control unit). Perform the self-diagnosis, and make sure that the result shows NO TC IS ETECTE. NG >> Repair or replace malfunctioning components. Perform the self-diagnosis, and make sure that the result shows NO TC IS ETECTE. Inspection 10: Stop Lamp Switch Circuit INSPECTION PROCEURE 1. CHECK SELF-IAGNOSIS RESULTS Check self-diagnosis results. Self-diagnosis results STOP LAMP SW Is above displayed on the self-diagnosis display? YES >> GO TO 2. NO >> INSPECTION EN 2. CHECK CONNECTOR NFS000QU 1. Turn ignition switch OFF and disconnect stop lamp switch connector E124 and ABS actuator and electric unit (control unit) connector E30, check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace terminal. 2. Reconnect connectors securely. 3. Start engine. 4. Repeat pumping brake pedal carefully several times, and perform self-diagnosis. OK >> INSPECTION EN NG >> GO TO 3. BRC-44

45 TROUBLE IAGNOSIS 3. CHECK STOP LAMP SWITCH CIRCUIT 1. Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector E Check voltage between ABS actuator and electric unit (control unit) harness connector E30 terminal 30 and ground. A B C ABS actuator and electric unit (control unit) 30 OK >> Perform self-diagnosis. NG >> Repair or replace stop lamp switch circuit. Perform the self-diagnosis, and make sure that the result shows NO TC IS ETECTE. Inspection 11: Yaw Rate/Side G Sensor Circuit Ground Condition Voltage Brake pedal depressed Brake pedal not depressed CAUTION: Sudden turns (such as spin turns, acceleration turns), drifting, etc., when VC function is off (VC OFF switch "ON") may cause yaw rate/side G sensor system to indicate a malfunction. However, this is not a malfunction, if normal operation can be resumed after restarting engine. Then erase memory of self-diagnosis. If vehicle is on turn-table at entrance to parking garage, or on other moving surface, VC OFF indicator lamp may illuminate and CONSULT-II self-diagnosis may indicate yaw rate sensor system malfunction. However, in this case there is no malfunction in yaw rate sensor system. Take vehicle off of turn-table or other moving surface, and start engine. Results will return to normal. And after doing spin turns or acceleration turns with VC function is being off (VC OFF switch ON ), too, the results will return to a normal condition by re-starting vehicle. INSPECTION PROCEURE 1. CHECK SELF-IAGNOSIS RESULTS SFIA3038E Battery voltage (Approx. 12 V) Approx. 0V NFS000QV E BRC G H I J K L M Check self-diagnosis results. Self-diagnosis results YAW RATE SENSOR SIE G-SEN CIRCUIT Is above displayed on the self-diagnosis display? YES >> GO TO 2. NO >> INSPECTION EN BRC-45

46 TROUBLE IAGNOSIS 2. CHECK CONNECTOR 1. Turn ignition switch OFF and disconnect yaw rate/side G sensor connector M145 and ABS actuator and electric unit (control unit) connector E30, check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace terminal. 2. Reconnect connector and perform self-diagnosis. OK >> INSPECTION EN NG >> GO TO CHECK YAW RATE/SIE G SENSOR POWER SUPPLY CIRCUIT 1. Turn ignition switch OFF and disconnect yaw rate/side G sensor connector M Turn ignition switch ON or OFF and check voltage between yaw rate/side G sensor harness connector M145 terminal 3 and ground. SFIA3044E Yaw rate/side G sensor Ground Condition Voltage 3 Ignition switch ON Ignition switch OFF Battery voltage (Approx. 12 V) Approx. 0V OK >> GO TO 4. NG >> Repair or replace malfunctioning components. Perform the self-diagnosis, and make sure that the result shows NO TC IS ETECTE. BRC-46

47 TROUBLE IAGNOSIS 4. CHECK YAW RATE/SIE G SENSOR HARNESS 1. Turn ignition switch OFF and disconnect Yaw rate/side G sensor connector M145 and ABS actuator and electric unit (control unit) connector E Check continuity between Yaw rate/side G sensor harness connector M145 and ABS actuator and electric unit (control unit) harness connector E30. A B C SFIA3045E E ABS actuator and electric unit (control unit) Yaw rate/side G sensor Continuity 18 1 OK >> GO TO 5. NG >> Repair or replace malfunctioning components. Perform the self-diagnosis, and make sure that the result shows NO TC IS ETECTE. 5. CHECK ATA MONITOR 1. Connect the Yaw rate/side G sensor connector and ABS actuator and electric unit (control unit) connector. 2. Select YAW RATE SEN, SIE G-SENSOR in ata Monitor and check Yaw rate/side G sensor signal. Vehicle condition YAW RATE SEN (ata monitor) SIE G-SENSOR (ata monitor) Stopped Approx. 0 d/s Approx. 0 m/s 2 Turning right Negative value Negative value Turning left Positive value Positive value OK >> Replace ABS actuator and electric unit (control unit). Perform the self-diagnosis, and make sure that the result shows NO TC IS ETECTE. NG >> Replace Yaw rate/side G sensor. Perform the self-diagnosis, and make sure that the result shows NO TC IS ETECTE. Yes BRC G H I J K L M BRC-47

48 TROUBLE IAGNOSIS Inspection 12: Brake Fluid Level Switch Circuit CAUTION: Check brake fluid level in brake reservoir tank before starting inspection. INSPECTION PROCEURE 1. CHECK SELF-IAGNOSIS RESULTS NFS000QW 1. Check brake fluid level in brake reservoir tank. If brake fluid level is low, refill brake fluid. 2. Check self-diagnosis results. Self-diagnosis results BR FLUI LEVEL LOW Is above displayed on the self-diagnosis display? YES >> GO TO 2. NO >> INSPECTION EN 2. CHECK CONNECTOR 1. Turn ignition switch OFF and disconnect brake fluid level switch connector E23 and ABS actuator and electric unit (control unit) connector E30, check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace terminal. 2. Reconnect connector and perform self-diagnosis. OK >> INSPECTION EN NG >> GO TO CHECK BRAKE FLUI LEVEL SWITCH 1. Turn ignition switch OFF and disconnect brake fluid level switch connector E Check continuity between brake fluid level switch connector E23 terminal 1 and 2. SFIA2966E Brake fluid level switch Condition Continuity 1, 2 When brake fluid is full in the reservoir tank When brake fluid is empty in the reservoir tank No Yes OK >> GO TO 4. NG >> Brake fluid level switch is malfunctioning. Replace reservoir tank. Refer to BR-15, "BRAKE MASTER CYLINER". Perform the self-diagnosis, and make sure that the result shows NO TC IS ETECTE. BRC-48

49 TROUBLE IAGNOSIS 4. CHECK BRAKE FLUI LEVEL SWITCH HARNESS 1. isconnect ABS actuator and electric unit (control unit) connector E Check continuity between brake fluid level switch harness connector E23 and ABS actuator and electric unit (control unit) harness connector E30. A B C E BRC G SFIA3046E H ABS actuator and electric unit (control unit) Brake fluid level switch Continuity OK >> Connect connector securely and perform self-diagnosis. NG >> Repair or replace malfunctioning components. Perform the self-diagnosis, and make sure that the result shows NO TC IS ETECTE. Inspection 13: RAS Control Unit Circuit (With RAS) INSPECTION PROCEURE 1. CHECK SELF-IAGNOSIS RESULTS 1 Yes 43 Ground No Ground 2 Yes NFS000QX I J K L M Check self-diagnosis results. Self-diagnosis results RAS CIRCUIT Is above displayed on the self-diagnosis display? YES >> GO TO 2. NO >> INSPECTION EN BRC-49

50 TROUBLE IAGNOSIS 2. CHECK RAS CONTROL UNIT CIRCUIT 1. Perform RAS control unit self-diagnosis. Repair or replace items indicated, then perform RAS control unit self-diagnosis again. Refer to STC-31, "SELF-IAGNOSIS PROCEURE". 2. Perform ABS actuator and electric unit (control unit) self-diagnosis. OK >> INSPECTION EN NG >> Repair or replace malfunctioning components. Perform the self-diagnosis, and make sure that the result shows NO TC IS ETECTE. Inspection 14: ICC Sensor Integrated Unit Circuit (With ICC) INSPECTION PROCEURE 1. CHECK SELF-IAGNOSIS RESULTS Check self-diagnosis results. Is above displayed on the self-diagnosis display? YES >> GO TO 2. NO >> INSPECTION EN 2. CHECK ICC SENSOR INTEGRATE UNIT CIRCUIT 1. Perform ICC sensor integrated unit self-diagnosis. Repair or replace items indicated, then perform ICC sensor integrated unit self-diagnosis again. Refer to ACS-27, "TROUBLE IAGNOSIS - GENERAL ESCRIPTION". 2. Perform ABS actuator and electric unit (control unit) self-diagnosis. OK >> INSPECTION EN NG >> Repair or replace malfunctioning components. Perform the self-diagnosis, and make sure that the result shows NO TC IS ETECTE. Inspection 15: AW Control Unit Circuit (AW Model) INSPECTION PROCEURE 1. CHECK SELF-IAGNOSIS RESULTS Check self-diagnosis results. Self-diagnosis results ACC CONT Self-diagnosis results 4W SYSTEM Is above displayed on the self-diagnosis display? YES >> GO TO 2. NO >> INSPECTION EN 2. CHECK AW C/U CIRCUIT 1. Perform AW control unit self-diagnosis. Repair or replace items indicated, then perform AW control unit self-diagnosis again. Refer to TF-14, "TROUBLE IAGNOSIS". 2. Perform ABS actuator and electric unit (control unit) self-diagnosis. OK >> INSPECTION EN NG >> Repair or replace malfunctioning components. Perform the self-diagnosis, and make sure that the result shows NO TC IS ETECTE. NFS000QY NFS000QZ BRC-50

51 TROUBLE IAGNOSIS Inspection 16: CAN Communication Circuit INSPECTION PROCEURE 1. CHECK CONNECTOR 1. Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector E30, check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace terminal. 2. Reconnect connector and perform self-diagnosis. Self-diagnosis results CAN COMM CIRCUIT ST ANG SEN COM CIR ACC COMM CIRCUIT (Note) Note: Indicated only for vehicles with ICC. Is above displayed on the self-diagnosis display? YES >> Print out self-diagnosis results and go to Refer to LAN-7, "Precautions When Using CONSULT-II". NO >> INSPECTION EN Inspection 17: VC OFF Switch Circuit INSPECTION PROCEURE 1. CHECK VC OFF SWITCH 1. Turn ignition switch OFF and disconnect VC OFF switch connector M Check continuity between VC OFF switch connector M24 terminal 1 and 2. NFS000R0 NFS000R1 A B C E BRC G H I J K SFIA2409E L VC OFF switch Condition Continuity 1,2 VC OFF switch ON VC OFF switch OFF OK >> GO TO 2. NG >> VC OFF switch is malfunctioning. Replace VC OFF switch. Yes No M BRC-51

52 TROUBLE IAGNOSIS 2. CHECK VC OFF SWITCH HARNESS 1. isconnect ABS actuator and electric unit (control unit) connector E Check continuity between VC OFF switch connector M24 and ABS actuator and electric unit (control unit) connector E30. SFIA3047E ABS actuator and electric unit (control unit) OK >> INSPECTION EN NG >> Repair or replace malfunctioning components. Inspection 18: Parking Brake Switch Circuit INSPECTION PROCEURE 1. CHECK PARKING BRAKE SWITCH VC OFF switch Continuity 1 Yes 31 Ground No Ground 2 Yes NFS000R2 1. Turn ignition switch OFF and disconnect parking brake switch connector E Check continuity between parking brake switch connector E110 and ground. Condition When the parking brake pedal is operated When the parking brake pedal is not operated Continuity OK >> GO TO 2. NG >> Parking brake switch is malfunctioning. Replace parking brake switch. Yes No SFIA2935E BRC-52

53 TROUBLE IAGNOSIS 2. CHECK PARKING BRAKE SWITCH HARNESS 1. isconnect ABS actuator and electric unit (control unit) connector E Check continuity between parking brake switch connector E110 and ABS actuator and electric unit (control unit) connector E30. A B C ABS actuator and electric unit (control unit) Parking brake switch Continuity 36 OK >> INSPECTION EN NG >> Repair or replace malfunctioning components. Inspection 19: Warning Lamp and Indicator Lamp Circuit INSPECTION PROCEURE 1. CHECK SELF-IAGNOSIS RESULTS 1 Yes Ground No Perform ABS actuator and electric unit (control unit) self-diagnosis. OK >> GO TO 2. NG >> Check items displayed by self-diagnosis. Refer to BRC-24, "ISPLAY ITEM LIST". 2. CHECK COMBINATION METER SFIA3048E NFS000R3 E BRC G H I J K Check the indication and operation of combination meter are normal. Refer to I-17, "Self-iagnosis Mode of Combination Meter". OK NG >> INSPECTION EN >> Combination meter is malfunctioning. Repair or replace combination meter. Refer to I-5, "COM- BINATION METERS". Symptom 1 Excessive ABS Function Operation Frequency 1. CHECK START NFS000R4 L M Check front and rear brake force distribution using a brake tester. Refer to BR-35, "SERVICE ATA AN SPECIFICATIONS (SS)". OK >> GO TO 2. NG >> Check brake system. BRC-53

54 TROUBLE IAGNOSIS 2. CHECK FRONT AN REAR AXLE Make sure that there is no excessive play in the front and rear axles. Refer to front: FAX-5, "WHEEL BEAR- ING INSPECTION", Rear: RAX-5, "WHEEL BEARING INSPECTION". OK >> GO TO 3. NG >> Repair or replace malfunctioning components. 3. CHECK WHEEL SENSOR AN SENSOR ROTOR Check the following. Wheel sensor installation for damage. Sensor rotor installation for damage. Wheel sensor connector connection. Wheel sensor harness inspection. OK >> GO TO 4. NG >> Replace wheel sensor or sensor rotor. Repair harness. 4. CHECK ABS WARNING LAMP ISPLAY Make sure that the ABS warning lamp is turned off after the ignition switch is turned ON or when driving. OK >> Normal NG >> Perform self-diagnosis. Refer to BRC-23, "Self-iagnosis". Symptom 2 Unexpected Pedal Reaction 1. CHECK BRAKE PEAL STROKE Check brake pedal stroke. Refer to BR-6, "Inspection and Adjustment". Is the stroke too big? YES >> Bleed air from brake tube and hose. Refer to BR-11, "Bleeding Brake System". Check brake pedal, brake booster, and master cylinder for mount play, looseness, brake system fluid leakage, etc. Refer to brake pedal: BR-7, "COMPONENTS", brake booster and master cylinder: BR-19, "COMPONENTS". NO >> GO TO CHECK FUNCTION isconnect ABS actuator and electric unit (control unit) connector to deactivate ABS. Check if braking force is normal in this condition.connect connector after inspection. OK >> GO TO procedure 3 CHECK WHEEL SENSOR AN SENSOR ROTOR of symptom 1. Refer to BRC-53, "Symptom 1 Excessive ABS Function Operation Frequency". NG >> Check brake system. NFS000R5 BRC-54

55 TROUBLE IAGNOSIS Symptom 3 The Braking istance Is Long CAUTION: The stopping distance on slippery road surfaces might be longer with the ABS operating than when the ABS is not operating. 1. CHECK FUNCTION Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector to deactivate ABS. In this condition, check stopping distance. After inspection, connect connector. OK >> GO TO procedure 3 CHECK WHEEL SENSOR AN SENSOR ROTOR of symptom 1. Refer to BRC-53, "Symptom 1 Excessive ABS Function Operation Frequency". NG >> Check brake system. Symptom 4 ABS Function oes Not Operate CAUTION: ABS does not operate when speed is 10 km/h (6 MPH) or lower. 1. CHECK ABS WARNING LAMP ISPLAY Make sure that the ABS warning lamp turns OFF after ignition switch is turned on or when driving. OK >> GO TO procedure 3 CHECK WHEEL SENSOR AN SENSOR ROTOR of symptom 1. Refer to BRC-53, "Symptom 1 Excessive ABS Function Operation Frequency". NG >> Perform self-diagnosis. Refer to BRC-23, "Self-iagnosis". Symptom 5 Pedal Vibration or ABS Operation Sound Occurs CAUTION: Under the following conditions, ABS is activated and vibration is felt when brake pedal is lightly depressed (just place a foot on it).however, this is normal. When shifting gears When driving on slippery road uring cornering at high speed When passing over bumps or grooves [at approximately 50 mm (1.97 in) or more] When pulling away just after starting engine [at approximately 10 km/h (6 MPH) or higher] 1. SYMPTOM CHECK 1 Check if there is pedal vibration or operation sound when the engine is started. o symptoms occur? YES >> GO TO 2. NO >> Perform self -diagnosis. Refer to BRC-23, "Self-iagnosis". 2. SYMPTOM CHECK 2 NFS000R6 NFS000R7 NFS000R8 A B C E BRC G H I J K L M Check symptoms when electrical component (headlamps, etc.) switches are operated. o symptoms occur? YES >> Check if there is a radio, antenna, antenna lead wire, or wiring close to the control unit. If there is, move it farther away. NO >> GO TO procedure 3 CHECK WHEEL SENSOR AN SENSOR ROTOR of symptom 1. Refer to BRC-53, "Symptom 1 Excessive ABS Function Operation Frequency". BRC-55

56 TROUBLE IAGNOSIS Symptom 6 Vehicle Jerks uring VC/TCS/ABS Control 1. SYMPTOM CHECK NFS000R9 Check if the vehicle jerks during VC/TCS/ABS control. OK >> Normal. NG >> GO TO CHECK SELF-IAGNOSIS RESULTS Perform self-diagnostic of ABS actuator and electric unit (control unit). Are self-diagnosis results indicated? YES >> Check corresponding items, make repairs, and perform ABS actuator and electric unit (control unit) self-diagnosis. NO >> GO TO CHECK CONNECTOR Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector and check terminal for deformation, disconnection, looseness, etc. Securely connect connectors and perform ABS actuator and electric unit (control unit) self-diagnosis. Are self-diagnosis results indicated? YES >> If poor contact, damage, open or short circuit of connector terminal is found, repair or replace. NO >> GO TO CHECK ECM AN A/T SELF-IAGNOSIS RESULTS Perform ECM and A/T self-diagnosis. Are self-diagnosis results indicated? YES >> Check the corresponding items. ECM: Refer to EC-100, "TROUBLE IAGNOSIS" (VQ35E), EC-811, "TROUBLE IAGNO- SIS" (VK45E). A/T: Refer to AT-44, "TROUBLE IAGNOSIS". NO >> Replace ABS actuator and electric unit (control unit). BRC-56

57 WHEEL SENSOR Removal and Installation COMPONENT WHEEL SENSOR PFP:47910 NFS000RA A B C E BRC G H I J 1. Front LH wheel sensor 2. Front LH wheel sensor connector 3. Clamp 4. Bracket 5. Rear RH wheel sensor connector 6. Rear LH wheel sensor connector 7. Rear LH wheel sensor 8. Rear RH wheel sensor A. Front side B. Rear side : Front Refer to GI section GI-11, "Components" for symbol marks in the figure. SFIA2723J NOTE: The above figure (front side) shows left side. Right side is the mirror image. REMOVAL Pay attention to the following when removing sensor. CAUTION: o not twist sensor harness as much as possible, when removing it. Pull sensors out without pulling on sensor harness. Take care to avoid damaging sensor edges or rotor teeth. Remove wheel sensor first before removing front or rear wheel hub. This is to avoid damage to sensor wiring and loss of sensor function. INSTALLATION Pay attention to the following when installing wheel sensor. Tighten installation bolts to the specified torques. Refer to BRC-57, "COMPONENT". K L M BRC-57

58 WHEEL SENSOR When installing, make sure there is no foreign material such as iron chips on and in the mounting hole of the wheel sensor. Make sure no foreign material has been caught in the sensor rotor. Remove any foreign material and clean the mount. When installing wheel sensor, be sure to press rubber grommets in until they lock at locations shown above in the figure. When installed, harness must not be twisted. BRC-58

59 SENSOR ROTOR Removal and Installation REMOVAL CAUTION: o not reuse sensor rotor. SENSOR ROTOR PFP:47970 Front Sensor rotor cannot be disassembled. Remove the sensor rotor together with hub bearing assembly. Refer to FAX-5, "REMOVAL". Rear Follow the procedure below to remove rear sensor rotor. Remove side flange. Refer to RF-14, "SIE OIL SEAL". Using a bearing replacer (suitable tool) and puller (suitable tool), remove sensor rotor from side flange. INSTALLATION Front Sensor rotor cannot be disassembled. Remove the sensor rotor together with hub bearing assembly. Refer to FAX-7, "INSTALLATION". Rear Follow the procedure below to install rear sensor rotor. Using a drift (SST), press rear sensor rotor onto side flange. Install side flange. Refer to RF-14, "SIE OIL SEAL". NFS000RB A B C E BRC G H I SFIA2040J J K L M BRC-59

60 ACTUATOR AN ELECTRIC UNIT (ASSEMBLY) ACTUATOR AN ELECTRIC UNIT (ASSEMBLY) Removal and Installation COMPONENT PFP:47660 NFS000RC 1. ABS actuator and electric unit (control 2. Connector 3. To front RH brake caliper unit) 4. To rear LH brake caliper 5. To rear RH brake caliper 6. To front LH brake caliper 7. From master cylinder primary side 8. From master cylinder secondary side 9. Bushing 10. Bracket A. Left side of dash panel Refer to GI section GI-11, "Components" for symbol marks in the figure. SFIA3018E CAUTION: Be careful of the following. Before servicing, disconnect the battery cable from negative terminal. To remove brake tube, use a flare nut wrench to prevent flare nuts and brake tube from being damaged. To install, use flare nut torque wrench. o not apply excessive impact to ABS actuator and electric unit (control unit), such as dropping it. o not remove and install actuator by holding harness. After work is completed, bleed air from brake tube. Refer to BR-11, "Bleeding Brake System". After installing harness connector in the ABS actuator and electric unit (control unit), make sure connector is securely locked. REMOVAL 1. Remove cowl top cover. Refer to EI-18, "REMOVAL". 2. isconnect ABS actuator and electric unit (control unit) connector. 3. Loosen brake tube flare nuts, then remove brake tubes from ABS actuator and electric unit (control unit). 4. Remove tire. 5. Remove fender protector (rear): (front LH side). Refer to EI-20, "REMOVAL". 6. Remove ABS actuator and electric unit (control unit) bracket mounting nut. BRC-60

61 ACTUATOR AN ELECTRIC UNIT (ASSEMBLY) 7. Remove ABS actuator and electric unit (control unit) from vehicle. INSTALLATION Installation is the reverse order of removal. CAUTION: When replacing ABS actuator and electric unit (control unit), make sure to adjust neutral position of steering angle sensor. Refer to BRC-6, "Adjustment of Steering Angle Sensor Neutral Position" A B C E BRC G H I J K L M BRC-61

62 G-SENSOR Removal and Installation G-SENSOR CAUTION: o not drop or strike yaw rate/side G sensor, because it has little endurance to impact. o not use power tool etc., because yaw rate/side G sensor is sensitive for the impact. REMOVAL 1. Remove center console. Refer to IP-10, "Component Parts rawing". 2. isconnect yaw rate/side G sensor harness connector. 3. Remove mounting bolts. Remove yaw rate/side G sensor. (Shown in the figure 1). PFP:47930 NFS000R INSTALLATION Installation is the reverse order of removal. SFIA2725J Yaw rate/side G sensor mounting bolt : 6.5 N m (0.66 kg m, 58 in-lb) BRC-62

63 STEERING ANGLE SENSOR Removal and Installation STEERING ANGLE SENSOR REMOVAL 1. Remove spiral cable assembly. Refer to SRS-40, "SPIRAL CABLE". 2. Remove steering angle sensor from spiral cable assembly. PFP:25554 NFS000RE A B C SFIA1404E INSTALLATION Installation is the reverse order of removal. CAUTION: After work, make sure to adjust neutral position of steering angle sensor. Refer to BRC-6, "Adjustment of Steering Angle Sensor Neutral Position". E BRC G H I J K L M BRC-63

64 STEERING ANGLE SENSOR BRC-64