HEATER & AIR CONDITIONING CONTROL SYSTEM

Transcription

1 VTITI, TR & IR ITIR STI TR & IR ITII TR SYST TTS UTTI IR ITIR SI ISTI... 5 ISIS RIR WRW... 5 Work low...5 ISTI USTT... 6 escription & Inspection...6 UTI ISIS...10 RSSR TR UTI...10 escription...10 omponent art ocation...10 omponent s role...14 UTTI IR ITIR SYST...15 System iagram...15 System escription...15 omponent art ocation...21 omponent escription...25 UITI SYST...26 System escription...26 ISIS SYST (UT.)...27 iagnosis escription...27 SUT-III unction...31 ISIS SYST ()...33 IT...33 IT : SUT-III unction ( - IT)...33 IR ITIR...33 IR ITIR : SUT-III unction ( - UT IR ITIR)...33 T TR...34 T TR : SUT-III unction ( - T TR)...34 R TR SYST...35 escription...35 I-V VTITR R - TR SYST...37 escription...37 IR IX R TR SYST...39 escription...39 IT R TR SYST...41 escription...41 WR TR TR SYST...43 escription...43 T UT TR SYST...45 escription...45 T TR TR SYST...46 escription...46 T ISIS...47 R TR...47 escription...47 omponent unction heck...47 iagnosis rocedure...47 I-V VTITR R TR...50 escription...50 omponent unction heck...50 iagnosis rocedure...50 omponent Inspection...52 IR IX R TR...54 escription...54 omponent unction heck...54 iagnosis rocedure...54 IT R TR...59 escription...59 omponent unction heck

2 iagnosis rocedure WR TR escription omponent unction heck iagnosis rocedure omponent Inspection T UT escription omponent unction heck iagnosis rocedure omponent Inspection T TR escription omponent unction heck iagnosis rocedure omponent Inspection T SSR escription omponent unction heck iagnosis rocedure omponent Inspection I-VI SSR escription omponent unction heck iagnosis rocedure omponent Inspection SU SSR escription omponent unction heck iagnosis rocedure omponent Inspection IT SSR escription omponent unction heck iagnosis rocedure omponent Inspection WR SUY RU IRUIT R UT escription omponent unction heck iagnosis rocedure U ISIS R R16 : Reference Value R R20 : Reference Value R R : Reference Value (Y TR U) Reference Value UT Reference Value Wiring iagram IR ITIR - TR SYST SYT ISIS IR ITIR TR iagnosis hart y Symptom ISUIIT I escription Inspection procedure ISUIIT TI escription Inspection procedure IS escription Inspection procedure S-ISIS T R- R escription Inspection procedure RY UTI S T RT..130 escription Inspection procedure RUTI RUTIS recaution for Supplemental Restraint System (SRS) "IR " and "ST T R-T- SIR" recaution ecessary for Steering Wheel Rotation fter attery isconnect recaution for rocedure without owl Top over. 132 Working with -134a (R-134a) eneral Refrigerant recaution Refrigerant onnection Service quipment RSSR eneral recautions URST TTR eneral recautions U IR ITIR SI ISTI : Reference Value ISIS RIR WRW Work low

3 ISTI USTT escription & Inspection UTI ISIS RSSR TR UTI escription omponent art ocation omponent s role U IR ITIR SYST System escription omponent art ocation omponent escription ISIS SYST () IT IT : SUT-III unction ( - IT) omponent unction heck iagnosis rocedure omponent Inspection WR SUY RU IRUIT R TR TR escription omponent unction heck iagnosis rocedure U IR ITIR SYST Wiring iagram IR ITIR - TR SYST U ISIS R R16 : Reference Value IR ITIR IR ITIR : SUT-III unction ( - U IR ITIR) T TR T TR : SUT-III unction ( - T TR) T UT TR SYST escription T TR TR SYST escription T ISIS I-V VTITR R TR escription omponent unction heck iagnosis rocedure omponent Inspection IT R TR escription omponent unction heck iagnosis rocedure WR TR escription omponent unction heck iagnosis rocedure omponent Inspection T UT escription omponent unction heck iagnosis rocedure omponent Inspection T TR escription R R20 : Reference Value : Reference Value R R : Reference Value (Y TR U) Reference Value SYT ISIS IR ITIR TR iagnosis hart y Symptom ISUIIT I escription Inspection procedure ISUIIT TI escription Inspection procedure IS escription Inspection procedure RUTI RUTIS recaution for Supplemental Restraint System (SRS) "IR " and "ST T R-T- SIR" recaution ecessary for Steering Wheel Rotation fter attery isconnect recaution for rocedure without owl Top over..219 Working with -134a (R-134a) eneral Refrigerant recaution Refrigerant onnection Service quipment...222

4 RSSR eneral recautions URST TTR eneral recautions

5 ISIS RIR WRW < SI ISTI > [UTTI IR ITIR] SI ISTI ISIS RIR WRW Work low TI W II: IST T USTR IT isten to customer complaint. (et detailed information about the conditions and environment when the symptom occurs.) >> T 2. 2.VRIY T SYT WIT RTI Verify the symptom with operational check. Refer to -6, "escription & Inspection". >> T T RRIT TRU ISIS o to appropriate trouble diagnosis (Refer to -122, "iagnosis hart y Symptom" below). >> T 4. 4.RIR R R Repair or replace the specific parts. >> T 5. 5.I inal check. YS >> UT >> T 3. -5

6 ISTI USTT < SI ISTI > [UTTI IR ITIR] ISTI USTT escription & Inspection II: SRITI The purpose of the operational check is to check if the individual system operates properly. onditions : ngine running at normal operating temperature ISTI RUR emory unction 1. Turn temperature control dial (driver side) clockwise until 30.0 is displayed. 2. ress / switch. 3. Turn ignition switch. 4. Turn ignition switch. 5. ress UT switch. 6. onfirm that the set temperature remains at previous temperature. 7. ress / switch. If, go to trouble diagnosis procedure for -130, "Inspection procedure". If, continue the check. lower 1. Turn fan control dial clockwise. lower should operate on low speed. 2. Turn fan control dial clockwise again, and continue checking blower speed until all speeds are checked. 3. eave blower on max. speed. If, go to trouble diagnosis procedure for -62, "iagnosis rocedure". If, continue the check. ischarge ir ( switch and switch) 1. ress switches and switch. 2. ach position indicator should illuminate. 3. onfirm that discharge air comes out according to the air distribution table. Refer to -15, "System escription". If, go to trouble diagnosis procedure for -47, "iagnosis rocedure". If, continue the check. T: onfirm that the magnet clutch is engaged (sound or visual inspection) and intake door position is at R when the / or is selected. ischarge ir (igh-level ventilator switch) 1. ress high-level ventilator switch. igh-level ventilator switch indicator should illuminate. -6 II0082

7 ISTI USTT < SI ISTI > [UTTI IR ITIR] 2. onfirm that discharge air comes out. 3. ress high-level ventilator switch again. igh-level ventilator indicator should not illuminate. If, go to trouble diagnosis procedure for -50, "iagnosis rocedure". If, continue the check. Intake ir 1. ress recirculation (R) switch. Recirculation indicator should illuminate. 2. ress fresh (R) switch. resh indicator should illuminate. 3. isten for intake door position change. (Slight change of blower sound can be heard.) If, go to trouble diagnosis procedure for -59, "iagnosis rocedure". If, continue the check. T: onfirm that the magnet clutch is engaged (sound or visual inspection) and intake door position is at R when the / or is selected. Temperature ecrease 1. Turn temperature control dial (driver side) counterclockwise until 16.0 is displayed. 2. heck for cold air at discharge air outlets. If, go to trouble diagnosis procedure for -123, "Inspection procedure". If, continue the check. Temperature Increase 1. Turn temperature control dial (driver side) clockwise until 30.0 is displayed. 2. heck for hot air at discharge air outlets. If, go to trouble diagnosis procedure for -125, "Inspection procedure". If, continue the check. / Switch 1. ress UT switch and / switch. 2. / switch indicator will turn. onfirm that the magnet clutch engages (sound or visual inspection). uto ode 1. ress UT switch and / switch. 2. UT switch indicator will turn. onfirm that discharge air and blower speed will depend on ambient, in-vehicle, and set temperatures. If, go to trouble diagnosis procedure for -89, "iagnosis rocedure", then if necessary, trouble diagnosis procedure for -66, "iagnosis rocedure". If all operational checks are (symptom cannot be duplicated), go to Incident Simulation Tests in I-38, "Work low" and perform tests as outlined to simulate driving conditions environment. If symptom appears, refer to -122, "iagnosis hart y Symptom" and perform applicable trouble diagnosis procedures. UXIIRY IS Temperature Setting Trimmer The trimmer compensates for differences in range of ±3 between temperature setting (displayed digitally) and temperature felt by customer. perating procedures for this trimmer are as follows: 1. egin self-diagnosis ST-5 mode. Refer to -27, "iagnosis escription". 2. Turn fan control dial clockwise to set system in auxiliary mode. 3. isplay shows 61 in auxiliary mechanism. It takes approximately 3 seconds to enable setting operation. 4. Turn temperature control dial (driver side) as desired. Temperature will change at a rate of 0.5 each time a dial is turned. UTI: decimal point is not indicated on the display. -7

8 ISTI USTT < SI ISTI > [UTTI IR ITIR] egative value is displayed on the left side display. When battery cable is disconnected or battery voltage is below 10 V, trimmer operation is canceled. Temperature set becomes that of initial condition, i.e. 0. Inlet ort emory unction When ignition switch is turned from to, inlet port can be set to UT or manual. perating procedures for this trimmer are as follows: 1. egin self-diagnosis ST-5 mode. Refer to -27, "iagnosis escription". 2. Turn fan control dial clockwise to set system in auxiliary mode. 3. ress recirculation (R) and fresh (R) switch as desired. II0089 Switch status of R/R switch Setting status Setting changeover method R anual R status is memorized. (Initial setting) UT control R switch: R anual R status is memorized. UT control (Initial setting) R switch: -8

9 ISTI USTT < SI ISTI > [UTTI IR ITIR] When battery cable is disconnected or battery voltage is below 10 V, memory function is canceled. emory function set becomes that of initial condition. -9

10 RSSR TR UTI < UTI ISIS > [UTTI IR ITIR] UTI ISIS RSSR TR UTI escription RII RTI ompressor is not activated. unctional circuit diagram II: SII0306 (1) : an SW signal S (3) : efogger signal (2) : / SW signal (1) : / signal (3) : ngine coolant temperature signal (2) : ompressor request signal S (1) : an signal (3) : ngine coolant temperature signal S (2) : / SW signal unctional initial inspection chart ocation T ITR Yes Yes Yes T ITR Yes SUT-III I /R T ITR Yes ITI TR T ITR Yes UT TIV TST Self-diagnosis function (except diagnosis) Yes Yes Yes omponent art ocation II: I RTT -10

11 RSSR TR UTI < UTI ISIS > [UTTI IR ITIR] 1. Refrigerant pressure sensor 2. ompressor 3. T sensor SSR RTT odels II

12 RSSR TR UTI < UTI ISIS > [UTTI IR ITIR] II Sunload sensor 2. igh-level ventilator door motor 3. Intake door motor 4. ir mix door motor (passenger side) 5. lower motor 6. ode door motor 7. an control amp. 8. ir mix door motor (driver side) 9. In-vehicle sensor 10. T heater 11. igh-level ventilator switch 12. uto amp. 13. Intake sensor R odels -12

13 RSSR TR UTI < UTI ISIS > [UTTI IR ITIR] 1. Sunload sensor 2. ir mix door motor (driver side) 3. Intake door motor 4. igh-level ventilator door motor 5. an control amp. 6. ode door motor 7. lower motor 8. ir mix door motor (passenger side) 9. T heater 10. igh-level ventilator switch 11. uto amp. 12. Intake sensor 13. In-vehicle sensor II0163ZZ -13

14 RSSR TR UTI < UTI ISIS > [UTTI IR ITIR] omponent s role II: omponent ir mix door motor uto amp. lower motor ompressor an control amp. igh-level ventilator door motor igh-level ventilator switch Intake door motor Intake sensor In-vehicle sensor ode door motor T sensor T heater Refrigerant pressure sensor Sunload sensor Reference -54, "escription" -89, "escription" -62, "escription" -66, "escription" -65, "omponent Inspection" -50, "escription" -52, "omponent Inspection" -59, "escription" -86, "escription" -80, "escription" -47, "escription" -77, "escription" -76, "omponent Inspection" -70, "omponent Inspection" -83, "escription" -14

15 UTTI IR ITIR SYST < UTI ISIS > [UTTI IR ITIR] UTTI IR ITIR SYST System iagram II: TR SYST The control system consists of input sensors, switches, auto amp. (microcomputer) and outputs. The relationship of these components is shown in the figure below: System escription TR RTI ontroller II0119 II: II

16 UTTI IR ITIR SYST < UTI ISIS > [UTTI IR ITIR] Switch The air discharge outlets is controlled with there switches. Temperature ontrol ial [otentio Temperature ontrol (river Side)] The set temperature is increased or decreased with this dial. Temperature ontrol ial [otentio Temperature ontrol (assenger Side)] The set temperature is increased or decreased with this dial. When the temperature control dial is turned, the U switch indicator will automatically illuminate. UT Switch The compressor, intake door, air mix doors, mode doors and blower speed are automatically controlled so that the in-vehicle temperature will reach, and be maintained at the set temperature selected by the operator. When pressing UT switch, air inlet, air outlet, fan speed, and discharge air temperature are automatically controlled. efroster () Switch ode doors are set to the defrost position with this switch. lso, intake door is set to the outside air position, and compressor turns. / Switch ompressor is or with this switch. (ressing the / switch when the / switch is will turn the / switch and compressor.) an ontrol ial The blower speed is manually controlled with this dial. Seven speeds are available for manual control (as shown on the s). / Switch ompressor and blower are, mode door is set to the foot position, and intake door is automatically controlled. Rear Window efogger Switch When illumination is, rear window is defogged. Recirculation (R) Switch When recirculation (R) switch is, R turns, and air inlet is fixed to R. When press recirculation (R) switch again, R turns, and then, automatic control mode is entered. When R is turned, shifting mode position to / or, or when compressor is turned from to, intake switch is automatically turned (fixed to automatic control mode). R mode can be reentered by pressing intake switch again, and then compressor is turned. (xcept / or position) resh (R) Switch When fresh (R) switch is, R turns, and air inlet is fixed to R. When press fresh (R) switch again, R turns, and then, automatic control mode is entered. U Switch When the U switch is turned, the driver side and passenger side, temperature can each be set independently. When the U switch is not turned, the driver side outlet and setting temperature is applied to both sides. igh-level Ventilator Switch When high-level ventilator switch is, high-level ventilator switch indicator turn, and high-level ventilator door is opened. -16

17 UTTI IR ITIR SYST < UTI ISIS > [UTTI IR ITIR] ISR IR W SII

18 UTTI IR ITIR SYST < UTI ISIS > [UTTI IR ITIR] SWITS TIR TR UTI II0080 II0081 IR ITIR TR SYST The (ocal rea etwork) system consists of auto amp., mode door motor, high-level ventilator door motor, air mix door motors and intake door motor. configuration of these components is shown in the figure below. -18 II0106

19 UTTI IR ITIR SYST < UTI ISIS > [UTTI IR ITIR] SYST STRUTI small network is constructed between the auto amp., mode door motor, high-level ventilator door motor, air mix door motors and intake door motor. The auto amp. and motors are connected by data transmission lines and motor power supply lines. The network is built through the ground circuits of each door motor. ddresses, motor opening angle signals, motor stop signals and error checking messages are all transmitted through the data transmission lines connecting the auto amp. and each door motor. The following functions are contained in Us built into the mode door motor, the high-level ventilator door motor, the air mix door motors and the intake door motor. ddress otor opening angle signals ata transmission otor stop and drive decision pening angle sensor (R function) omparison ecision (uto amp. indicated value and motor opening angle comparison) II0107 peration The auto amp. receives data from each of the sensors. The auto amp. sends mode door, high-level ventilator door, air mix door and intake door opening angle data to the mode door motor U, high-level ventilator door motor U, air mix door motor Us and intake door motor U. The mode door motor, high-level ventilator door motor, air mix door motors and intake door motor read their respective signals according to the address signal. pening angle indication signals received from the auto amp. and each of the motor position sensors is compared by the Us in each door motor with the existing decision and opening angles. Subsequently, T/, /VT, /SUT and R/R operation is selected. The new selection data is returned to the auto amp. II0108 Transmission ata and Transmission rder uto amp. data is transmitted consecutively to each of the doors motor following the form shown in the figure below. STRT: Initial compulsory signal is sent to each of the door motors. RSS: ata sent from the auto amp. are selected according to data-based decisions made by the mode door motor, high-level ventilator door motor, air mix door motors and intake door motor. If the addresses are identical, the opening angle data and error check signals are received by the door motor Us. The Us then make the appropriate error decision. If the opening angle data have no error, door control begins. If an error exists, the received data are rejected and corrected data received. inally, door control is based upon the corrected opening angle data. -19

20 UTTI IR ITIR SYST < UTI ISIS > [UTTI IR ITIR] I : ata that shows the indicated door opening angle of each door motor. RRR : In this procedure, transmitted and received data is checked for errors. rror data are then compiled. The error check prevents corrupted data from being used by the mode door motor, the high-level ventilator door motor, the air mix door motors and the intake door motor. rror data can be related to the following symptoms. - alfunction of electrical frequency - oor electrical connections - Signal leakage from transmission lines - Signal level fluctuation ST SI: t the end of each transmission, a stop operation, in-operation, or internal malfunction message is delivered to the auto amp. This completes one data transmission and control cycle. II0109 IR IX R TR (UTTI TRTUR TR) The air mix doors are automatically controlled so that in-vehicle temperature is maintained at a predetermined value by the temperature setting, ambient temperature, in-vehicle temperature and amount of sunload. S TR lower speed is automatically controlled by the temperature setting, ambient temperature, in-vehicle temperature, intake temperature, amount of sunload and air mix door position. With pressing UT switch, the blower motor starts to gradually increase air flow volume. When engine coolant temperature is low, the blower motor operation is delayed to prevent cool air from flowing. IT R TR The intake doors are automatically controlled by the temperature setting, ambient temperature, in-vehicle temperature, intake temperature, amount of sunload and / operation of the compressor. R TR The mode door is automatically controlled by the temperature setting, ambient temperature, in-vehicle temperature, intake temperature and amount of sunload. I-V VTITR R TR The high-level ventilator door is controlled by high-level ventilator door switch. -20

21 UTTI IR ITIR SYST < UTI ISIS > [UTTI IR ITIR] T UT TR When / switch, UT switch, /T switch, switch is pressed, auto amp. transmits compressor signal to. sends compressor signal to, via communication. judges whether compressor can be turned, based on each sensor status (refrigerant-pressure sensor signal, throttle angle, etc.). If it judges compressor can be turned, it sends compressor signal to I /R, via communication. Upon receipt of compressor signal from, I /R turns air conditioner relay to operate compressor. When sending compressor signal to I /R via communication, simultaneously sends compressor feedback signal to combination meter via communication. ombination meter sends compressor feedback signal to auto amp., then, uses input compressor feedback signal to control air inlet. omponent art ocation I RTT II0120 II:

22 UTTI IR ITIR SYST < UTI ISIS > [UTTI IR ITIR] II Refrigerant pressure sensor 2. ompressor 3. T sensor SSR RTT odels -22

23 UTTI IR ITIR SYST < UTI ISIS > [UTTI IR ITIR] 1. Sunload sensor 2. igh-level ventilator door motor 3. Intake door motor 4. ir mix door motor (passenger side) 5. lower motor 6. ode door motor 7. an control amp. 8. ir mix door motor (driver side) 9. In-vehicle sensor 10. T heater 11. igh-level ventilator switch 12. uto amp. 13. Intake sensor II0104 R odels -23

24 UTTI IR ITIR SYST < UTI ISIS > [UTTI IR ITIR] II0163ZZ 1. Sunload sensor 2. ir mix door motor (driver side) 3. Intake door motor 4. igh-level ventilator door motor 5. an control amp. 6. ode door motor 7. lower motor 8. ir mix door motor (passenger side) 9. T heater 10. igh-level ventilator switch 11. uto amp. 12. Intake sensor 13. In-vehicle sensor -24

25 UTTI IR ITIR SYST < UTI ISIS > [UTTI IR ITIR] omponent escription II: omponent ir mix door motor uto amp. lower motor ompressor an control amp. igh-level ventilator door motor igh-level ventilator switch Intake door motor Intake sensor In-vehicle sensor ode door motor T sensor T heater Refrigerant pressure sensor Sunload sensor Reference -54, "escription" -89, "escription" -62, "escription" -66, "escription" -65, "omponent Inspection" -50, "escription" -52, "omponent Inspection" -59, "escription" -86, "escription" -80, "escription" -47, "escription" -77, "escription" -76, "omponent Inspection" -70, "omponent Inspection" -83, "escription" -25

26 UITI SYST < UTI ISIS > [UTTI IR ITIR] UITI SYST System escription II: (ontroller rea etwork) 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. any 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 communication, control units are connected with 2 communication lines (- line, - line) allowing a high rate of information transmission with less wiring. ach control unit transmits/receives data but selectively reads required data only. or details, refer to -22, " System Specification hart". -26

27 ISIS SYST (UT.) < UTI ISIS > [UTTI IR ITIR] ISIS SYST (UT.) iagnosis escription S-ISIS SYST The self-diagnosis system is built into the auto amp. to quickly locate the cause of malfunctions. II: S-ISIS UTI The self-diagnosis system diagnoses sensors, door motors, blower motor, etc. by system line. Refer to applicable sections (items) for details. Shifting from normal control to the self-diagnosis system is accomplished by starting the engine (turning the ignition switch ) and pressing / switch for at least 5 seconds. The / switch must be pressed within 10 seconds after starting the engine (ignition switch is turned ). This system will be canceled by either pressing UT switch or turning the ignition switch. Shifting from one step is accomplished by means of turning temperature control dial (driver side), as required. Shifting from ST-5 to UXIIRY IS is accomplished by means of pressing fan control dial clockwise. RTI T 1.ST I S-ISIS SII

28 ISIS SYST (UT.) < UTI ISIS > [UTTI IR ITIR] 1. Turn ignition switch. 2. Set in self-diagnosis mode as follows. Within 10 seconds after starting engine (ignition switch is turned.), press / switch for at least 5 seconds. T: If battery voltage drops below 12 V during diagnosis ST-3, door motor speed becomes slower and as a result, the system may generate an error even when operation is normal. To avoid this, start engine before performing this diagnosis. >> T 2. 2.ST-1: S ISY R heck s (1) illumination and display screen (2). Is this inspection result normal? YS >> T 3. >> alfunctioning / switch or auto amp. Refer to -129, "Inspection procedure". 3.ST-2: SSR R TR IRUITS R R R SRT IRUIT Turn temperature control dial (driver side) clockwise. oes code o. 20 appear on the display? YS >> T 4. >> T 11. II0173ZZ II ST-3: R, I-V VTITR R IT R SITIS R Turn temperature control dial (driver side) clockwise. oes code o. 30 appear on the display? YS >> T 5. >> T ST-4: RTI R TR IS II

29 ISIS SYST (UT.) < UTI ISIS > [UTTI IR ITIR] 1. Turn temperature control dial (driver side) clockwise. 2. ress () switch. ode o. of each door motor test is indicated on the display. >> T 6. II TUTRS Refer to the following chart and check discharge air flow, air temperature, blower motor voltage and compressor operation. II0082 ode o ode door position VT / 1 / 2 T / Intake door position R R 20% R R R R ir mix door position U U U T U T U T U T lower motor voltage 5 V V 8.5 V 8.5 V 8.5 V V ompressor igh-level ventilator door position SUT SUT hecks must be made visually, by listening the sound, or by touching air outlets with hand, etc. for improper operation. Is this inspection result normal? YS >> T >> ir outlet does not change. Refer to -47, "iagnosis rocedure". -2 >> Intake door does not change. Refer to -59, "iagnosis rocedure". -3 >> ischarge air temperature does not change. Refer to -54, "iagnosis rocedure". -4 >> lower motor operation is malfunctioning. Refer to -62, "iagnosis rocedure". -5 >> agnet clutch does not engage. Refer to -66, "iagnosis rocedure". -6 >> igh-level ventilator door does not change.- Refer to -50, "iagnosis rocedure". 7.ST-5: TRTUR SSR IS 1. Turn temperature control dial (driver side) clockwise. 2. ode o. 51 appears on the display. >> T

30 ISIS SYST (UT.) < UTI ISIS > [UTTI IR ITIR] 8. T SSR ress () switch one time. Temperature detected by T sensor is indicated on the display. T: If the temperature indicated on the display greatly differs from the actual temperature, check sensor circuit first, and then check sensor. Is this inspection result normal? YS >> T 9. >> o to T Sensor ircuit. Refer to -77, "iagnosis rocedure". 9. I-VI SSR ress () switch for the one time. Temperature detected by in-vehicle sensor is indicated on the display. T: If the temperature indicated on the display greatly differs from the actual temperature, check sensor circuit first, and then check sensor. Is this inspection result normal? YS >> T 10. >> o to In-vehicle Sensor ircuit. Refer to -81, "iagnosis rocedure". 10. IT SSR ress () switch for the one time. Temperature detected by intake sensor is indicated on the display. T: If the temperature indicated on the display greatly differs from the actual temperature, check sensor circuit first, and then check sensor. Is this inspection result normal? YS >> T 11. >> o to Intake Sensor ircuit. Refer to -86, "iagnosis rocedure". II0110 II UTII SSR R TR Refer to the following chart for malfunctioning code o. (If two or more sensors and door motors malfunction, corresponding code os. indicates 1 second each.) II0112 ode o. alfunctioning sensor and door motor (Including circuits) Reference 21 / 21 T sensor -77, "iagnosis rocedure" 22 / 22 In-vehicle sensor -81, "iagnosis rocedure" 24 / 24 Intake sensor -86, "iagnosis rocedure" 25 / 25 Sunload sensor * -83, "iagnosis rocedure" 26 / 26 ir mix door motor R (river side) 27 / 27 ir mix door motor R (assenger side) -54, "iagnosis rocedure" *: erform self-diagnosis ST-2 under sunshine. -30

31 ISIS SYST (UT.) < UTI ISIS > [UTTI IR ITIR] When performing indoors, aim a light (more than 60 W) at sunload sensor, otherwise code o. 25 will indicate despite that sunload sensor is functioning properly. >> ISTI 12. UTII R TR SITI SWIT ode, high-level ventilator and/or intake door motor R(s) is/are malfunctioning. II0114 ode o. *1 *2 *3 ode, high-level ventilator or intake door position Reference 31 igh-level ventilator door open igh-level ventilator door motor -50, "iagnosis rocedure" 32 igh-level ventilator door shut 33 VT 34 / 1 35 / R 38 20% R 39 R ode door motor Intake door motor -47, "iagnosis rocedure" -59, "iagnosis rocedure" (If two or more door motors are malfunctioning, corresponding code os. indicates 1 second each.) *1: If high-level ventilator door motor harness connector is disconnected, the following display pattern will appear to 31 *2: If mode door motor harness connector is disconnected, the following display pattern will appear Return to 33 *3: If intake door motor harness connector is disconnected, the following display pattern will appear Return to 37 II0115 >> ISTI SUT-III unction II: SUT-III ITI ITS SUT-III can display each diagnosis item using the diagnosis test modes shown following. -31

32 ISIS SYST (UT.) < UTI ISIS > [UTTI IR ITIR] System part heck item, diagnosis mode escription ata monitor isplays input data in real time. ata monitor isplays input data in real time. T ITR isplay Item ist () With asoline ngine onitor Item ondition Value/Status RSS S ngine is running Warm-up condition oth / switch and blower fan motor switch: (ompressor operates.) V With iesel ngine onitor Item ondition Value/Status RRRT RSS ngine is running Warm-up condition ir conditioner switch: Shift lever: eutral position o load pproximately 5.7 bar isplay Item ist () onitor Item ondition Value/Status I SW Ignition switch n SI Ignition switch lower fan motor switch lower fan motor switch n IR SW Ignition switch ompressor ompressor n -32

33 ISIS SYST () < UTI ISIS > [UTTI IR ITIR] ISIS SYST () IT IT : SUT-III unction ( - IT) ITI IT SUT-III performs the following functions via communication with. iagnosis mode Work Support Self iagnostic Result iag Support onitor ata onitor ctive Test cu Identification onfiguration SYST ITI can perform the following functions for each system. T: It can perform the diagnosis modes except the following for all sub system selection items. IR ITIR unction escription hanges the setting for each system function. isplays the diagnosis results judged by. Refer to S-62, "T Index". onitors the reception status of communication viewed from. The input/output signals are displayed. The signals used to activate each device are forcibly supplied from. The part number is displayed. nables to read and save the vehicle specification. nables to write the vehicle specification when replacing. II: : pplicable item iagnosis mode System Sub system selection item WR SURT T ITR TIV TST oor lock R Rear window defogger RR R Warning chime UZZR Interior room lamp IT Remote keyless entry system UTI RT T xterior lamp Wiper and washer WIR Turn signal and hazard warning lamps SR ir conditioner IR ITR Intelligent ey system ITIT Y ombination switch SW Immobilizer IU Interior room lamp battery saver TTRY SVR ack door open TRU Vehicle security system TT Signal buffer system SI UR T heater system T TR IR ITIR : SUT-III unction ( - UT IR ITIR) II: T ITR isplay Item ist -33

34 ISIS SYST () < UTI ISIS > [UTTI IR ITIR] I SW onitor Item [Unit] [n/] ontents isplays [ignition switch position (n)/(), position ()] status as judged form ignition switch signal. SI [n/] isplays [ (n)/ ()] status as judged form blower fan motor switch signal. IR SW [n/] isplays [ (n)/ ()] status as judged form air conditioner switch signal. T TR T TR : SUT-III unction ( - T TR) II: T ITR isplay Item ist onitor Item [Unit] WR UT [/RZ/IT] SI [n/] I STTUS [ST/ST/RU/R] T T [ ] TTRY VT [V] I R [rpm] UTSI T [ ] escription isplays [/RZ/IT] condition of the T heater states. isplays [ ()/ ()] status as judged from blower fan motor signal. isplays [ST/ST/RU/R] condition of the engine states. The engine coolant temperature (determined by the signal voltage of the engine coolant temperature sensor) is displayed. The power supply voltage of is displayed. Indicates the engine speed computed from the signal of the crankshaft position sensor. The outside air temperature (determined by the signal voltage of the T sensor) is displayed. TIV TST Test item Test Item peration escription T TR T 1 T 2 T 3 This test is able to check T heater operation. -34

35 R TR SYST < UTI ISIS > [UTTI IR ITIR] R TR SYST escription SYST SRITI omponent arts II: ode door control system components are: uto amp. ode door motor (U) / system (R built-in mode door motor, high-level ventilator door motor, air mix door motor and intake door motor) In-vehicle sensor T sensor Sunload sensor Intake sensor System peration The auto amp. receives data from each of the sensors. The auto amp. sends air mix door, mode door, high-level ventilator door and intake door opening angle data to the air mix door motor Us, mode door motor U, high-level ventilator door motor U and intake door motor U. The air mix door motors, mode door motor, high-level ventilator door motor and intake door motor read their respective signals according to the address signal. pening angle indication signals received from the auto amp. and each of the motor position sensors are compared by the Us in each door motor with the existing decision and opening angles. Subsequently, T/, /VT, /SUT and R/R operation is selected. The new selection data are returned to the auto amp. II

36 R TR SYST < UTI ISIS > [UTTI IR ITIR] System ircuit ode oor ontrol Specification ode position can be selected manually by pressing switch or switch of the controller. This enables to fix a mode position. utomatic control by auto amp. ressing UT switch allows automatic control by auto amp. uring the automatic control of mode position, a mode door position (VT, /, T, or /) is selected based on a target air mix door opening angle and sunload depending on a temperature calculated by auto amp. In addition, / is selected to prevent windshield fogging only when ambient temperature is extremely low with mode position T. II0122 II

37 I-V VTITR R TR SYST < UTI ISIS > [UTTI IR ITIR] I-V VTITR R TR SYST escription SYST SRITI omponent arts II: i-level ventilator door control system components are: uto amp. igh-level ventilator door motor (U) / system (R built-in mode door motor, high-level ventilator door motor, air mix door motor and intake door motor) igh-level ventilator switch System peration The auto amp. sends air mix door, mode door, high-level ventilator door and intake door opening angle data to the air mix door motor Us, mode door motor U, high-level ventilator door motor U and intake door motor U. The air mix door motors, mode door motor, high-level ventilator door motor and intake door motor read their respective signals according to the address signal. pening angle indication signals received from the auto amp. and each of the motor position sensors are compared by the Us in each door motor with the existing decision and opening angles. Subsequently, T/, /VT, /SUT and R/R operation is selected. The new selection data are returned to the auto amp. II

38 I-V VTITR R TR SYST < UTI ISIS > [UTTI IR ITIR] System ircuit II

39 IR IX R TR SYST < UTI ISIS > [UTTI IR ITIR] IR IX R TR SYST escription SYST SRITI omponent arts II: ir mix door control system components are: uto amp. ir mix door motor (U) / system (R built-in mode door motor, high-level ventilator door motor, air mix door motor and intake door motor) In-vehicle sensor T sensor Sunload sensor Intake sensor System peration The auto amp. receives data from each of the sensors. The auto amp. sends air mix doors, mode door, high-level ventilator door and intake door opening angle data to the air mix door motor Us, mode door motor U, high-level ventilator door motor U and intake door motor U. The air mix door motors, mode door motor, high-level ventilator door motor and intake door motor read their respective signals according to the address signal. pening angle indication signals received from the auto amp. and each of the motor position sensors are compared by the Us in each door motor with the existing decision and opening angles. Subsequently, T/, /VT, /SUT and R/R operation is selected. The new selection data are returned to the auto amp. SII

40 IR IX R TR SYST < UTI ISIS > [UTTI IR ITIR] System ircuit ir ix oor ontrol Specification When ignition switch is, auto amp. continuously and automatically controls temperatures regardless of air conditioner operational condition. When setting a target temperature with temperature control dial, auto amp. corrects the set temperature and decides a target air mix door opening angle. uto amp. controls air mix door according to the target air mix door opening angle and current air mix door opening angle in order to keep an optimum air mix door opening angle. When a temperature is set at 16.0, air mix door is fixed at full cold, and when a temperature is set at 30.0, it is set at full hot. II0122 R457-40

41 IT R TR SYST < UTI ISIS > [UTTI IR ITIR] IT R TR SYST escription SYST SRITI omponent arts II: Intake door control system components are: uto amp. Intake door motor (U) / system (R built-in mode door motor, high-level ventilator door motor, air mix door motor and intake door motor) In-vehicle sensor T sensor Sunload sensor Intake sensor System peration The auto amp. receives data from each of the sensors. The auto amp. sends air mix doors, mode door, high-level ventilator door and intake door opening angle data to the air mix door motor Us, mode door motor U, high-level ventilator door motor U and intake door motor U. The air mix door motors, mode door motor, high-level ventilator door motor and intake door motor read their respective signals according to the address signal. pening angle indication signals received from the auto amp. and each of the motor position sensors are compared by the Us in each door motor with the existing decision and opening angles. Subsequently, T/, /VT, /SUT and R/R operation is selected. The new selection data are returned to the auto amp. The intake door control determines intake door position based on the ambient temperature, the intake air temperature and the in-vehicle temperature. When shifting mode position /, when the or switches are pressed, or when / switch is, the auto amp. sets the intake door at the R position. II

42 IT R TR SYST < UTI ISIS > [UTTI IR ITIR] System ircuit Intake oor ontrol Specification Intake door position is basically fixed at R when R indicator lamps of switch and intake switch turn, and fixed at R when R indicator lamp of intake switch turns. Intake door automatic control selects R, 20%R, or R depending on a target air mix door opening angle, based on in-vehicle temperature, ambient temperature, and sunload. II0122 R383-42

43 WR TR TR SYST < UTI ISIS > [UTTI IR ITIR] WR TR TR SYST escription SYST SRITI omponent arts an speed control system components are: uto amp. / system (R built-in mode door motor, air mix door motors and intake door motor) In-vehicle sensor T sensor Sunload sensor Intake sensor System peration II: II0167 lower motor circuit II0168 utomatic ode In the automatic mode, the blower motor speed is calculated by the auto amp. based on the input from the R, in-vehicle sensor, sunload sensor, intake sensor and T sensor. The blower motor applied voltage ranges from approximately 4 V (lowest speed) to 12 V (highest speed). The control blower speed (in the range of 4 to 12 V), auto amp. supplies a gate voltage to the fan control amp. ased on this voltage, fan control amp. control voltage supplied to the blower motor. Starting an Speed ontrol Start up from S ondition (utomatic mode) In a cold start up condition where the engine coolant temperature is below 56 (133 ), the blower will not operate for a short period of time (up to 150 seconds). The exact start delay time varies depending on the ambient and engine coolant temperature. -43

44 WR TR TR SYST < UTI ISIS > [UTTI IR ITIR] In the most extreme case (very low ambient temperature) the blower starting delay will be 150 seconds as described above. fter this delay, the blower will operate at low speed until the engine coolant temperature rises above 56 (133 ), and then the blower speed will increase to the objective speed. Start up from usual or T S ondition (utomatic mode) The blower will begin operation momentarily after the UT switch is pressed. The blower speed will gradually rise to the objective speed over a time period of 3 seconds or less (actual time depends on the objective blower speed). lower Speed ompensation Sunload When the in-vehicle temperature and the set temperature are very close, the blower will be operating at low speed. The low speed will vary depending on the sunload. uring conditions of low or no sunload, the blower speed is low (approx. 4 V). uring high sunload conditions, the auto amp. raise the blower speed (approx. 4.5 V). an Speed ontrol Specification SII

45 T UT TR SYST < UTI ISIS > [UTTI IR ITIR] T UT TR SYST escription II: SYST SRITI uto amp. controls compressor operation by ambient temperature, intake air temperature and signal from. System peration II0120 ow Temperature rotection ontrol uto amp. will turn compressor or as determined by a signal detected by T sensor and intake sensor. When ambient temperature is higher than 2 (23 ), the compressor turns. The compressor turns when ambient temperature is lower than 5 (28 ). R094-45

46 T TR TR SYST < UTI ISIS > [UTTI IR ITIR] T TR TR SYST escription II: SYST SRITI controls T (ositive Temperature oefficient) heater correspond to fan signal, ambient temperature, engine coolant temperature, engine speed, engine status, electrical power cut freeze signal and battery voltage. sends T signal to I /R, via communication. judges whether T can be turned, based on each sensor status (ambient temperature, engine speed, engine coolant temperature, etc.). If it judges T can be turned, it send T heater relay signal to I /R via communication. System peration SII

47 R TR < T ISIS > [UTTI IR ITIR] T ISIS R TR escription T SRITI ode oor otor The mode door motor (1) are attached to the / unit assembly. It rotates so that air is discharged from the outlet set by the auto amp. otor rotation is conveyed to a link which activates the mode door. : Vehicle front II: omponent unction heck II0023ZZ II: IR SYT Y RRI T WI RTI 1. ress switches and switch. 2. ach position indicator should illuminate. 3. onfirm that discharge air comes out according to the air distribution table at below. Refer to -15, "System escription". T: onfirm that the magnet clutch is engaged (Sound or visual inspection) and intake door position is at R when or / is selected. YS >>. >> o to diagnosis procedure. Refer to -47, "iagnosis rocedure". iagnosis rocedure 1.RR S-ISIS ST-2 erform self-diagnosis ST-2. Refer to -27, "iagnosis escription", see o. 1 to 3. oes code o. 20 appear on the display? YS >> T 2. >> Refer to -27, "iagnosis escription", see o RR S-ISIS ST-3 erform self-diagnosis ST-3. Refer to -27, "iagnosis escription", see o. 1 to 4. oes code o. 30 appear on the display? YS >> T >> ode o. 33, 34, 35 or 36 appear on the display: T >> ode o. 37, 38 or 39 appear on the display. Refer to -59, "iagnosis rocedure". -3 >> ode o. 31 or 32 appear on the display.- Refer to -50, "iagnosis rocedure". 3. WR SUY R UT. 1. Turn ignition switch. 2. heck voltage between auto amp. harness connector 53 terminal 20 and ground. II:

48 R TR < T ISIS > [UTTI IR ITIR] (+) ( ) uto amp. Voltage onnector Terminal round attery voltage YS >> T 4. >> Replace auto amp. 4. SI R UT. onfirm / signal between auto amp. harness connector 53 terminal 3 and ground using an oscilloscope. (+) ( ) uto amp. onnector Terminal Voltage 53 3 round SI1453 YS >> T 5. >> Replace auto amp. 5. WR SUY R R TR heck voltage between mode door motor harness connector 310 terminal 1 and ground. (+) ( ) ode door motor Voltage onnector Terminal round attery voltage YS >> T 6. >> Repair harness or connector. 6. SI R R TR onfirm / signal between mode door motor harness connector 310 terminal 3 and ground using an oscilloscope. -48

49 R TR < T ISIS > [UTTI IR ITIR] (+) ( ) ode door motor onnector Terminal Voltage round YS >> T 7. >> Repair harness or connector. 7. R TR RU IRUIT 1. Turn ignition switch. 2. isconnect mode door motor connector. 3. heck continuity between mode door motor harness connector 310 terminal 2 and ground. ode door motor onnector Terminal ontinuity round ontinuity should exist SI1453 YS >> Replace mode door motor. >> Repair harness or connector. 8.RR S-ISIS ST-4 erform self-diagnosis ST-4. Refer to -27, "iagnosis escription", see o. 1 to 6. Is it operated normally? YS >>. >> T R TR I heck mode door control linkage. Is it installed normally? YS >> Refer to VT-36, "xploded View". >> Repair or adjust control linkage. -49

50 I-V VTITR R TR < T ISIS > [UTTI IR ITIR] I-V VTITR R TR escription T SRITI II: igh-level Ventilator oor otor The high-level ventilator door motor (1) are attached to the / unit assembly. It rotates so that air is discharged from the outlet set by the auto amp. otor rotation is conveyed to a link which activates the high-level ventilator door. models : Vehicle front II0024ZZ R models : Vehicle front omponent unction heck 1.IR SYT Y RRI T WI RTI 1. ress high-level ventilator switch. 2. igh-level ventilator switch indicator turn. 3. onfirm that discharge air comes out high-level ventilator. YS >>. >> o to diagnosis procedure. Refer to -50, "iagnosis rocedure". iagnosis rocedure II0025ZZ II: II: RR S-ISIS ST-3 erform self-diagnosis ST-3. Refer to -27, "iagnosis escription", see o. 1 to 4. oes code o. 30 appear on the display? YS >> T >> ode o. 33, 34, 35 or 36 appear on the display. Refer to -47, "iagnosis rocedure". -2 >> ode o. 37, 38 or 39 appear on the display. Refer to -59, "iagnosis rocedure". -3 >> ode o. 31 or 32 appear on the display: T WR SUY R UT. 1. Turn ignition switch. 2. heck voltage between auto amp. harness connector 53 terminal 20 and ground. -50

51 I-V VTITR R TR < T ISIS > [UTTI IR ITIR] (+) ( ) uto amp. Voltage onnector Terminal round attery voltage YS >> T 3. >> Replace auto amp. 3. SI R UT. onfirm / signal between auto amp. harness connector 53 terminal 3 and ground using an oscilloscope. (+) ( ) uto amp. onnector Terminal Voltage 53 3 round YS >> T 4. >> Replace auto amp. 4. WR SUY R I-V VTITR R TR heck voltage between high-level ventilator door motor harness connector 44 terminal 1 and ground. (+) ( ) igh-level VT door motor Voltage onnector Terminal 44 1 round attery voltage YS >> T 5. >> Repair harness or connector. 5. SI R I-V VTITR R TR onfirm / signal between high-level ventilator door motor harness connector 44 terminal 3 and ground using an oscilloscope. SI

52 I-V VTITR R TR < T ISIS > [UTTI IR ITIR] (+) ( ) igh-level VT door motor onnector Terminal Voltage 44 3 round YS >> T 6. >> Repair harness or connector. 6. I-V VTITR R TR RU IRUIT 1. Turn ignition switch. 2. isconnect high-level ventilator door motor connector. 3. heck continuity between high-level ventilator door motor harness connector 44 terminal 2 and ground. SI1453 igh-level VT door motor onnector Terminal ontinuity 44 2 round ontinuity should exist YS >> Replace high-level ventilator door motor. >> Repair harness or connector. 7.RR S-ISIS ST-4 erform self-diagnosis ST-4. Refer to -27, "iagnosis escription", see o. 1 to 6. Is it operated normally? YS >>. >> T I-V VTITR R TR I heck high-level ventilator door control linkage. Is it installed normally? YS >> Refer to VT-38, "xploded View". >> Repair or adjust control linkage. omponent Inspection II: I-V VTITR SWIT heck continuity between high-level ventilator switch (1) 52 terminal 2 and 3. SII0303ZZ -52

53 I-V VTITR R TR < T ISIS > [UTTI IR ITIR] igh-level ventilator switch onnector Terminal onnector Terminal ondition ontinuity igh-level VT SW: igh-level VT SW: ontinuity should not exist ontinuity should exist -53

54 IR IX R TR < T ISIS > [UTTI IR ITIR] IR IX R TR escription T SRITI II: ir ix oor otor The air mix door motors (1) are attached to the / unit assembly. It rotates so that the air mix door is opened or closed to a position set by the auto amp. otor rotation is then conveyed through a shaft and the air mix door position feedback is then sent to the auto amp. by R built-in air mix door motor. : Vehicle front omponent unction heck 1.IR SYT Y RRI T WI RTI 1. Turn temperature control dial (driver side) clockwise until 30.0 is displayed. 2. heck for hot air at discharge air outlets. 3. Turn temperature control dial (driver side) counterclockwise until 16.0 is displayed. 4. heck for cold air at discharge air outlets. YS >>. >> o to diagnosis procedure. Refer to -54, "iagnosis rocedure" iagnosis rocedure II0026ZZ II: II: RR S-ISIS ST-2 erform self-diagnosis ST-2. Refer to -27, "iagnosis escription", see o. 1 to 3. oes code o. 20 appear on the display? YS >> T 2. >> o to appropriate malfunctioning sensor circuit. Refer to -27, "iagnosis escription", see o RR S-ISIS ST-4 erform self-diagnosis ST-4. Refer to -27, "iagnosis escription", see o.1 to 6. Is it operated normally? YS >>. -54