HEATER & AIR CONDITIONING CONTROL SYSTEM

Transcription

1 VTITI, TR & IR ITIR STI TR & IR ITII TR SYST TTS UTTI IR ITII SI ISTI... 5 ISIS RIR WR W... 5 Work low...5 ISTI... 8 escription & Inspection...8 UXIIRY IS...10 Temperature Setting Trimmer...10 Inlet ort emory unction...11 SYST SRITI...12 RSSR TR UTI...12 escription...12 omponent arts ocation...13 omponent escription...13 UTTI IR ITII SYST...15 System iagram...15 System escription...15 omponent arts ocation...24 omponent escription...24 ISIS SYST (/ UT.)...26 iagnosis escription...26 ISIS SYST () (WIT ITI- T Y SYST)...30 IT...30 IT : SUT-III unction ( - IT)...30 IR ITIR...31 IR ITIR : SUT-III unction ( - UT IR ITIR)...31 ISIS SYST () (WITUT I- TIT Y SYST)...33 IT...33 IT : SUT-III unction ( - IT)...33 IR ITIR...33 IR ITIR : SUT-III unction ( - UT IR ITIR)...34 T/IRUIT ISIS...35 IT SSR...35 escription...35 iagnosis rocedure...35 omponent Inspection...36 I-VI SSR...38 escription...38 iagnosis rocedure...38 omponent Inspection...39 IT SSR...41 escription...41 iagnosis rocedure...41 omponent Inspection...42 SU SSR...43 escription...43 iagnosis rocedure...43 omponent Inspection...44 IR IX R TR...46 escription...46 iagnosis rocedure...46 omponent Inspection...47 R TR...49 escription...49 iagnosis rocedure...49 omponent Inspection...50 IT R TR...52 escription...52 iagnosis rocedure

2 omponent Inspection WR TR escription omponent unction heck iagnosis rocedure omponent Inspection T UT escription omponent unction heck iagnosis rocedure / SI omponent unction heck iagnosis rocedure WR SI omponent unction heck iagnosis rocedure WR SUY RU IRUIT / UT / UT. : iagnosis rocedure (Y TR SYST) (WIT IT- IT Y SYST) (Y TR SYST) (WIT IT- IT Y SYST) : iagnosis rocedure (Y TR SYST) (WITUT I- TIT Y SYST) (Y TR SYST) (WITUT ITIT Y SYST) : iagnosis rocedure / UT escription omponent unction heck iagnosis rocedure U ISIS IRTI / UT Reference Value Wiring iagram - UTTI IR ITI- I SYST (Y TR U) (Y TR SYST) (WIT IT- IT Y SYST) (Y TR SYST) (WIT IT- IT Y SYST) : Reference Value (Y TR SYST) (WIT IT- IT Y SYST) : Wiring iagram (Y TR SYST) (WIT IT- IT Y SYST) : ail-safe (Y TR SYST) (WIT IT- IT Y SYST) : T Inspection riority hart (Y TR SYST) (WIT IT- IT Y SYST) : T Index (Y TR SYST) (WITUT I- TIT Y SYST) (Y TR SYST) (WITUT ITIT Y SYST) : Reference Value. 112 (Y TR SYST) (WITUT ITIT Y SYST) : Wiring iagram (Y TR SYST) (WITUT ITIT Y SYST) : ail-safe (Y TR SYST) (WITUT ITIT Y SYST) : T Inspection riority hart (Y TR SYST) (WITUT ITIT Y SYST) : T Index SYT ISIS UTTI IR ITII SYST..134 iagnosis hart y Symptom ISUIIT I escription iagnosis rocedure ISUIIT TI escription iagnosis rocedure RSSR S T RT escription iagnosis rocedure RY UTI S T RT..140 escription Inspection rocedure RUTI RUTIS recaution for Supplemental Restraint System (SRS) "IR " and "ST T R-T- SIR" recaution ecessary for Steering Wheel Rotation after attery isconnect RV ISTTI / TR (/ UT.) xploded View Removal and Installation IT SSR xploded View Removal and Installation I-VI SSR xploded View Removal and Installation

3 SU SSR xploded View Removal and Installation IT SSR xploded View Removal and Installation RRIRT RSSUR SSR xploded View Removal and Installation WR TRSISTR xploded View Removal and Installation R TR xploded View IT R TR IT R TR : Removal and Installation R TR R TR : Removal and Installation IR IX R TR IR IX R TR : Removal and Installation U IR ITII SI ISTI ISIS RIR WRW Work low ISTI escription & Inspection SYST SRITI RSSR TR UTI escription omponent art ocation omponent escription U IR ITII SYST System iagram System escription omponent art ocation omponent escription ISIS SYST () IT IT : SUT-III unction ( - IT) IR ITIR IR ITIR : SUT-III unction T/IRUIT ISIS WR SUY RU IRUIT : iagnosis rocedure IT R TR escription iagnosis rocedure omponent Inspection TR TR IIR escription omponent unction heck iagnosis rocedure WR TR escription iagnosis rocedure omponent Inspection T UT escription omponent unction heck iagnosis rocedure / SWIT escription omponent unction heck iagnosis rocedure RSTR SITI SI escription omponent unction heck iagnosis rocedure / IITR omponent unction heck iagnosis rocedure WR SI omponent unction heck iagnosis rocedure U IR ITII SYST Wiring iagram U IR ITI- I SYST U ISIS IRTI (Y TR U) Reference Value Wiring iagram ail-safe T Inspection riority hart T Index SYT ISIS U IR ITII SYST iagnosis hart y Symptom ISUIIT I

4 escription iagnosis rocedure ISUIIT TI escription iagnosis rocedure RSSR S T RT escription iagnosis rocedure RUTI RUTIS recaution for Supplemental Restraint System (SRS) "IR " and "ST T R-T- SIR" recaution ecessary for Steering Wheel Rotation after attery isconnect RV ISTTI / TR xploded View Removal and Installation TR TR IIR xploded View Removal and Installation RRIRT RSSUR SSR xploded View Removal and Installation WR RSISTR xploded View Removal and Installation IT R TR xploded View Removal and Installation R xploded View R R : Removal and Installation. 231 IR IX R IR IX R : Removal and Installation

5 ISIS RIR WR W < SI ISTI > [UTTI IR ITII] SI ISTI ISIS RIR WR W Work low VR SQU II: TI W -5 II1650

6 ISIS RIR WR W < SI ISTI > [UTTI IR ITII] 1.ITRVIW R UTI Interview the symptom to the customer. >> T 2. 2.SYT heck the symptom from the customer's information. >> T 3. 3.SI ISTI heck the operation of each part. heck that any symptom occurs other than the interviewed symptom. >> T 4. 4.S-ISIS WIT R ISIS SYST erform the self-diagnosis with on board diagnosis. heck that whether malfunction result is detected or not. Refer to -26, "iagnosis escription". Is any malfunction result detected? YS >> T 5. >> T 6. 5.TRU ISIS Y UTI erform the trouble diagnosis for the detected malfunction result. Specify the malfunction part. >> T 6. 6.S-ISIS WIT SUT-III erform the self-diagnosis with SUT-III. heck that any T is detected. Is any T detected? YS >> T 7. >> T 8. 7.TRU ISIS Y T erform the trouble diagnosis for the detected T. Specify the malfunctioning part. >> T 8. 8.SYT ISIS erform the symptom diagnosis. Specify the malfunctioning part. >> T 9. 9.UTI RT RIR Repair or replace the malfunctioning part. >> T RIR (S-ISIS WIT R ISIS SUT-III) erform the self-diagnoses with on board diagnosis and SUT-III. heck that any T or malfunction result is not detected. rase T if T is detected before the repair. heck that T is not detected again. Is any or malfunction result or T detected? YS-1 >> If malfunction result is detected, T 5. YS-2 >> If T is detected, T 7. >> T

7 ISIS RIR WR W < SI ISTI > [UTTI IR ITII] 11.RIR (RTI ) heck the operation of each part. oes it operate normally? YS >> ISTI >> T 3. -7

8 ISTI < SI ISTI > [UTTI IR ITII] ISTI escription & Inspection SRITI The purpose of the operational check is to check that the individual system operates normally. II: heck condition : ngine running at normal operating temperature. 1. RY UTI 1. Start the engine. 2. Set the temperature to 32 (90 ) by operating the temperature control switch. 3. ress switch. 4. Turn ignition switch. 5. Turn ignition switch. 6. ress UT switch. 7. heck that the set temperature is maintained. Is the inspection result normal? YS >> T 2. >> emory function malfunction. Refer to -140, "Inspection rocedure". 2. WR TR 1. Start the engine. 2. perate the fan control switch. heck that the fan speed changes. heck the operation for all fan speeds. 3. eave blower on maximum speed. Is the inspection result normal? YS >> T 3. >> lower motor system malfunction. Refer to -56, "iagnosis rocedure". 3. ISR IR 1. perate switch and switch to each position. 2. heck that the air outlets change according to each indicated air outlet by placing a hand in front of the outlets. Refer to VT-2, "System escription". Is the inspection result normal? YS >> T 4. >> ode door system malfunction. Refer to -49, "iagnosis rocedure". 4. IT IR 1. ress R switch to set the air outlet to recirculation. 2. The R indicator turns. 3. isten to intake sound and confirm air inlets change. 4. ress R switch again to set the air outlet to fresh air intake. 5. The R indicator turns. 6. isten to intake sound and confirm air inlets change. Is the inspection result normal? YS >> T 5. >> Intake door system malfunction. Refer to -52, "iagnosis rocedure". 5. / SWIT 1. ress the / switch. 2. heck that the indicator of the / switch turns. heck visually and by sound that the compressor operates. 3. ress the / switch again. 4. heck that the indicator of the / switch turns. heck that the compressor stops. Is the inspection result normal? YS >> T 6. >> agnet clutch system malfunction. Refer to -61, "iagnosis rocedure". -8

9 ISTI < SI ISTI > [UTTI IR ITII] 6. ISR IR TRTUR perate the temperature control switch. heck that the discharge air temperature changes. Is the inspection result normal? YS >> T 7. >> ir mix door system malfunction. Refer to -46, "iagnosis rocedure". 7. TRTUR RS 1. perate the compressor. 2. perate the temperature control switch to lower temperature setting at 18 (60 ). 3. heck that the cool air blows from the outlets. Is the inspection result normal? YS >> T 8. >> Insufficient cooling. Refer to -135, "iagnosis rocedure". 8. TRTUR IRS 1. Turn temperature control switch to raise temperature setting at 32 (90 ) after warming up the engine. 2. heck that warm air blows from outlets. Is the inspection result normal? YS >> T 9. >> Insufficient heating. Refer to -137, "iagnosis rocedure". 9. UT 1. ress UT switch to confirm that UT is indicated on the display. 2. perate the temperature control switch to check that the fan speed or air outlet changes (the air flow temperature or fan speed varies depending on the ambient temperature, in-vehicle temperature, and set temperature). Is the inspection result normal? YS >> ISTI >> Refer to -134, "iagnosis hart y Symptom" and perform the appropriate diagnosis. -9

10 UXIIRY IS < SI ISTI > [UTTI IR ITII] UXIIRY IS Temperature Setting Trimmer II: SRITI If the temperature felt by the customer is different than the air flow temperature controlled by the temperature setting, the / auto amp. control temperature can be adjusted to compensate for the temperature setting. RTI RURS 1. egin self-diagnosis ST 5 mode. Refer to -26, "iagnosis escription". 2. ress fan control switch (up: +) to enter the set temperature setting trimmer mode from ST 5, and then display shows 0 (0 ). 3. The indication temperature will be changed by 1 (1 ) in range of 3 ( 6 ) to +3 (+6 ) by pressing the temperature control switch each time. US models Temperature control switch operation isplay orrection ( ) 6 time pressing time pressing time pressing time pressing time pressing time pressing 1 +1 Initial status time pressing UT time pressing UT time pressing UT time pressing UT time pressing UT time pressing UT 6 6 anada models Temperature control switch operation isplay orrection ( ) 3 time pressing time pressing time pressing 1 +1 Initial status time pressing UT time pressing UT time pressing UT 3 3 T: When 3 ( 6 ) is corrected on the temperature setting set as 25 (75 ), the temperature controlled by / auto amp. is 25 (75 ) 3 (6 ) = 22.0 (69 ) and the temperature becomes lower than the temperature setting. When the battery cable is disconnected from the negative terminal or when the battery voltage becomes 10 V or less, the setting of the difference between the set temperature and control temperature may be cancelled. -10

11 UXIIRY IS < SI ISTI > [UTTI IR ITII] Inlet ort emory unction II: SRITI Inlet port setting can be memorized when ignition switch is turned. Inlet port setting can be selected from R (fresh air intake), R (recirculation), or o not perform the memory when ignition switch is turned. RTI RURS 1. egin self-diagnosis ST 5 mode. Refer to -26, "iagnosis escription". 2. ress fan control switch (up: +) two times to change the mode to the temperature setting trimmer from self-diagnosis ST 5, and then the display shows The setting of inlet port memory function can be selected from 70 to 73 by pressing the R switch. R switch operation isplay anual R emory function anual R 70 * Shall be memorized Shall not be memorized 1 time pressing 71 Shall not be memorized Shall not be memorized 2 time pressing 72 Shall be memorized Shall be memorized 3 time pressing 73 Shall not be memorized Shall be memorized *: Initial status T: When R switch is pressed four times, display shows "70" again. When the battery cable is disconnected from the negative terminal or when the battery voltage becomes 1 or less, the setting of the inlet port memory function may be cancelled. -11

12 RSSR TR UTI < SYST SRITI > [UTTI IR ITII] SYST SRITI RSSR TR UTI escription RII RTI unctional ircuit iagram II: II1651 unctional Initial Inspection hart ontrol unit (1) : an signal (1) : / switch signal : lower fan signal (2) : / switch signal (2) : / compressor request signal iagnosis item ocation : pplicable / auto amp. board self-diagnosis -IR I I /R I /R Self-diagnosis ata monitor Self-diagnosis ( communication line) ata monitor Self-diagnosis ( communication line) ata monitor uto active test -12

13 RSSR TR UTI < SYST SRITI > [UTTI IR ITII] omponent arts ocation II: Sunload sensor 2. mbient sensor 3. agnet clutch 4. Refrigerant pressure sensor 5. / control (/ auto amp.) 6. In-vehicle sensor 7. lower motor 8. ode door motor 9. ower transistor 10. Intake door motor 11. ir mix door motor 12. Intake sensor. ocated in the right side of / unit assembly. ocated on the evaporator omponent escription. ocated in the back of / unit assembly II1719ZZ. ocated in left side of / unit assembly II: Sunload sensor mbient sensor omponent -43, "escription" -35, "escription" escription -13

14 RSSR TR UTI < SYST SRITI > [UTTI IR ITII] omponent agnet clutch Refrigerant pressure sensor / control (/ auto amp.) In-vehicle sensor lower motor ir mix door motor ower transistor Intake sensor ode door motor Intake door motor -61, "escription" -415, "escription" -70, "escription" -38, "escription" -56, "escription" -46, "escription" -56, "escription" -41, "escription" -49, "escription" -52, "escription" escription -14

15 UTTI IR ITII SYST < SYST SRITI > [UTTI IR ITII] UTTI IR ITII SYST System iagram II: System escription II: UTI utomatic air conditioner system is controlled by each function of / auto amp.,, and I /R. ontrol by / auto amp. - ir outlet control - Temperature control - ir inlet control - ir flow control - ompressor control - oor motor control (U communication control) ontrol by - ompressor control ontrol by - ooling fan control. Refer to -61, "System escription". - ir conditioning cut control. Refer to -45, "System escription". - ompressor control II1652 ontrol by I /R - Relay control. Refer to S-4, "System escription" (WIT I-Y) or S-35, "System escription" (WIT- UT I-Y). - ooling fan control. Refer to S-4, "System escription" (WIT I-Y) or S-35, "System escription" (WITUT I-Y). ach / system can be operated by / controller (built-in / auto amp.). -15

16 UTTI IR ITII SYST < SYST SRITI > [UTTI IR ITII] RTI ontroller (/ ontrol) or US II1668ZZ 1. switch 2. an control switch 3. switch 4. switch 5. R switch 6. R switch 7. / switch 8. Temperature control switch 9. UT switch 10. Rear window defogger switch 11. / display or anada II1653ZZ 1. switch 2. an control switch 3. switch 4. switch 5. R switch 6. R switch 7. / switch 8. Temperature control switch 9. UT switch 10. Rear window defogger switch 11. / display Switch peration -16

17 UTTI IR ITII SYST < SYST SRITI > [UTTI IR ITII] switch an control switch switch ode switch R switch R switch Temperature control switch switch indicator is turned by pressing switch each time. When switch is operated while air conditioner system is activated, the system becomes the following states. - ompressor: - ir inlet: resh air intake - lower fan: uto control (if blower fan is set to manual mode before pressing switch, it becomes manual mode) - When mode set to, air conditioner system returns previous condition which is set to mode. When switch is operated while air conditioner system is inactivation, the system becomes the following states. - ir conditioner system: - ompressor: - ir inlet: resh air intake - lower fan: uto control When mode set to, all air conditioner system is. T: When mode is set to during auto control of air conditioner system, the system becomes manual control. an speed is selected within a range between 1st 7th speed by pressing this switch. T: When air conditioner system is, air conditioner system is set to by pressing this switch. When fan control switch is operated during auto control of air conditioner system, the system becomes manual mode. ir conditioner system is turned by pressing this switch. When the air conditioner system becomes, air inlet and outlet are set as follows: - ir inlet: R (except R is manually selected) - ir outlet: T ode position is changed in order of VT / T / VT by operating this switch each time. When / is selected while blower motor is activated, air conditioner system becomes the following states. - ompressor: - ir inlet: resh air intake T: When switch is operated during auto control of air conditioner system, the system becomes manual mode. ir inlet is selected to recirculation (R) by pressing this switch. R indicator R indicator T: ven if the air conditioner system is, air inlet can be selected. When mode position is / or, recirculation (R) cannot be selected. When R switch is selected, the compressor is turned. When R indicator is, pressing the R switch for approximately 1.5 seconds or more, and then the R and R switch indicators blink twice and the system is switched to the automatic control. ir inlet is selected to fresh air intake (R) by pressing this switch. R indicator: R indicator: T: ven if the air conditioner system is, air inlet can be selected. When mode position is / or, air inlet is set to R forcibly. When R indicator is, pressing the R switch for approximately 1.5 seconds or more, and then the R and R switch indicators blink twice and the system is switched to the automatic control. Setting temperature is selected within a range between 18 (60 ) 32 (90 ) by pressing this switch. : Increase : ecrease T: ven if air conditioner system is, setting temperature can be selected by pressing these switch. -17

18 UTTI IR ITII SYST < SYST SRITI > [UTTI IR ITII] / switch Rear window defogger switch The compressor control (switch indicator) is turned between by pressing this switch each time only when blower fan is activated. T: When blower fan is inactivation, compressor control can not be turned. When mode position is / or, / switch is turned forcibly. Rear window defogger (switch indicator) is turned between by pressing this switch each time. Rear window defogger system details. Refer to -4, "System escription". IR UTT TR While air outlet is in automatic control, / auto amp. selects the mode door position depending on a target air mix door angle and outlet air temperature calculated from sunload. If ambient temperature is excessively low, / is selected to prevent windshield fogging when air outlet is set to T. TRTUR TR When ignition switch is in the position, / auto amp. always automatically controls temperature regardless of air conditioner operational state. / auto amp. calculates the target air mix door opening angle depending on set temperature, in-vehicle temperature, ambient temperature, and sunload. ir mix door is controlled depending on the comparison of current air mix door opening angle and target air mix door opening angle. Regardless of in-vehicle temperature, ambient temperature, and sunload, air mix door is fixed at the fully cold position when set temperature is 18 (60 ), and at the fully hot position when set temperature is 32 (90 ). SII1334 II0633 IR IT UTI While air inlet is in automatic control, / auto amp. selects air inlet (fresh air intake, 20% fresh air intake, or recirculation) depending on set temperature, in-vehicle temperature, and ambient temperature. ir inlet is fixed to 80% R, only when the conditions are satisfied as follows: - ir inlet is T or / - mbient temperature is 2 (36 ) or less - aximum fan speed IR W TR escription / auto amp. changes duty ratio of blower motor drive signal and controls air flow continuously. When air flow is increased, duty ratio of blower motor drive signal gradually increases to prevent a sudden increase in air flow. In addition to manual control and automatic control, air flow control is compose of starting fan speed control, low coolant temperature starting control, high in-vehicle temperature starting control, and blower speed control at door motor operation. utomatic ir low ontrol / auto amp. decides target air flow depending on target air mix door opening angle. II

19 UTTI IR ITII SYST < SYST SRITI > [UTTI IR ITII] / auto amp. changes duty ratio of blower motor drive signal and controls air flow continuously so that air flow matches to target air flow. When air outlet is VT or /, the minimum air flow is changed depending on sunload. II1564 Starting an Speed ontrol When blower motor is activated, / auto amp. gradually increases duty ratio of blower fan drive signal to prevent a sudden increase in discharge air flow. (T1 T2 = approximately 10 seconds) T: o not perform the starting air flow control when the discharge outlet is set to. ow oolant Temperature Starting ontrol If the engine coolant temperature is 56 (133 ) or less, to prevent a cold discharged air flow, / auto amp. suspends blower motor activation for the maximum 150 seconds depending on target air mix door opening angle. fter this, blower fan drive signal is increased gradually, and blower motor is activated. II1655 SII1529 an speed ontrol at oor otor peration When mode door motor is activated while air flow is more than the specified value, / auto amp. reduces temporarily fan speed so that mode door moves smoothly. igh In-vehicle Temperature Starting ontrol When evaporator temperature is high [intake air temperature sensor value is 35 (95 ) or more], to prevent a hot discharged air flow, / auto amp. suspends blower motor activation for approximately 3 seconds so that evaporator is cooled by refrigerant. RSSR TR escription When the compressor activation condition is satisfied while blower motor is activated, / auto amp. transmits / signal and blower fan signal to. transmits / signal and blower fan signal to via communication. judges that the compressor can be activated depending on each sensors state (refrigerant pressure sensor signal, throttle opening angle sensor signal, and others). nd transmits / relay control signal to I /R via communication. I /R turns / relay and activates the compressor depending on request from. -19

20 UTTI IR ITII SYST < SYST SRITI > [UTTI IR ITII] ompressor rotection ontrol at ressure alfunction When high-pressure side value that is detected by refrigerant pressure sensor is as per the following state, requests I /R to turn / relay and stops the compressor a (31.8 kg/cm 2, 452 psi) or more (When the engine speed is less than 1,500 rpm) 2.74 a (27.9 kg/cm 2, 397 psi) or more (When the engine speed is 1,500 rpm or more) 0.14 a (1.4 kg/cm 2, 20 psi) or less ompressor il irculation ontrol When the engine starts while the engine coolant temperature is 56 (133 ) or less, activates the compressor for approximately 6 seconds and circulates the compressor lubricant once. ow Temperature rotection ontrol When intake sensor detects that evaporator surface temperature is 2 (36 ) or less, / auto amp. requests to turn the compressor, and stops the compressor. When the air temperature returns to 3.5 (38 ) or more, the compressor is activated. perating Rate ontrol When set temperature is other than fully cold or air outlet is VT, / or T / auto amp. controls the compressor activation depending on ambient temperature. ir onditioner ut ontrol When the engine is running in excessively high load condition, requests I /R to turn / relay, and stops the compressor. Refer to -45, "System escription" for details. R TR TR ode oor otor The / auto amp. receives data from each sensors. When a drive signal is input from / auto amp. to door motor, a step motor built into the door motor rotates according to the drive signal, and then stops at the position of target door. SI0802 ir ix oor otor SI

21 UTTI IR ITII SYST < SYST SRITI > [UTTI IR ITII] The / auto amp. receives data from each sensors. When a drive signal is input from / auto amp. to door motor, a step motor built into the door motor rotates according to the drive signal, and then stops at the position of target door. Intake oor otor The / auto amp. receives data from each sensor, and converts them to control signal. The / auto amp. sends the control signal to Intake door motor. When intake door motor receives the control signal, intake door is moved to appropriate position by R opening angle indication signal. SI0970 SWITS TIR TR UTIS II

22 UTTI IR ITII SYST < SYST SRITI > [UTTI IR ITII] II1584ZZ 1. Intake door 2. lower motor 3. In-cabin microfilter 4. vaporator 5. Upper air mix door 6. ower air mix door 7. eater core 8. oot door 9. Side ventilator door 10. Sub defroster door 11. enter ventilator and defroster door resh air intake Recirculation air efroster enter ventilator Side ventilator oot Rear foot oor position Switch position enter ventilator and defroster door Sub defroster door Side ventilator door oot door Intake door Upper air mix door ower air mix door UT switch UT -22

23 UTTI IR ITII SYST < SYST SRITI > [UTTI IR ITII] Switch position enter ventilator and defroster door Sub defroster door Side ventilator door oor position oot door Intake door Upper air mix door ower air mix door switch Q switch I R switch* R switch* Temperature control switch *: Inlet status is displayed by indicator during activating automatic control IR ISTRIUTI ull cold 18 (60 ) (61 89 ) ull hot 32 (90 ) UT switch Q UT ode position indication ischarge air flow ir outlet/distribution Ventilator ront foot Rear foot efroster 100% 57% 29% 14% 19% 44% 19% 18% 17% 40% 17% 26% 18% 82% -23

24 UTTI IR ITII SYST < SYST SRITI > [UTTI IR ITII] omponent arts ocation II: II1719ZZ 1. Sunload sensor 2. mbient sensor 3. agnet clutch 4. Refrigerant pressure sensor 5. / control (/ auto amp.) 6. In-vehicle sensor 7. lower motor 8. ode door motor 9. ower transistor 10. Intake door motor 11. ir mix door motor 12. Intake sensor. ocated in the right side of / unit assembly. ocated on the evaporator omponent escription. ocated in the back of / unit assembly. ocated in left side of / unit assembly II: Sunload sensor mbient sensor omponent -43, "escription" -35, "escription" escription -24

25 UTTI IR ITII SYST < SYST SRITI > [UTTI IR ITII] agnet clutch omponent -61, "escription" escription Refrigerant pressure sensor -415, "escription" / control (/ auto amp.) In-vehicle sensor -70, "escription" -38, "escription" lower motor ir mix door motor -56, "escription" -46, "escription" ower transistor -56, "escription" Intake sensor ode door motor -41, "escription" -49, "escription" Intake door motor -52, "escription" -25

26 ISIS SYST (/ UT.) < SYST SRITI > [UTTI IR ITII] ISIS SYST (/ UT.) iagnosis escription II: R S-ISIS SYST board self-diagnosis system is built into / auto amp. to quickly locate the case of malfunctions. The selfdiagnosis system diagnoses sensor, door motor, blower motor, etc. and also can make the setting of auxiliary mechanism. ST 1: Indicator check ST 2: Sensor diagnosis ST 3: oor motor diagnosis ST 4: peration check iagnosis item iagnosis content iagnosis part ST 5: ach sensor recognition temperature check ST 6: Temperature setting trimmer ST 7: Inlet port memory function S-ISIS RUR Switch indicator and display indication are checked. The circuit diagnoses of each sensor and intake door motor are performed. / auto amp. indicates the result on the display. The circuit diagnoses of mode door motor and air mix door motor are performed. / auto amp. indicates the result on the display. perational check of each part is performed. ach sensor recognition temperature is indicated on the display. Self-diagnosis ode ntry The self-diagnosis is started by pressing the switch at 5 seconds or more within 10 seconds after starting engine. 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. Start engine before performing this diagnosis to avoid this. hanges of Step up and Step down The changes of ST 1 5 can be performed by pressing the temperature control switch. The change of ST 6 7 can be performed by pressing the fan control switch during the condition of ST-5. Self-diagnosis ancellation y UT switch is pressed or ignition switch is turned, the self-diagnosis is canceled. ST-1: IITR escription / switch indicator and / display indication are checked. ormal: ll switch indicator and display indication are turned. alfunction: alfunctioning part indicator is not turned. ST-2: SSR ISIS / control (/ auto amp.) mbient sensor In-vehicle sensor Intake sensor Sunload sensor Intake door motor (R) ode door motor ir mix door motor ode door motor Intake door motor ir mix door motor lower motor ompressor ondenser fan mbient sensor In-vehicle sensor Intake sensor Temperature setting trimmer is performed. Inlet port memory function is performed. -26

27 ISIS SYST (/ UT.) < SYST SRITI > [UTTI IR ITII] escription When ST-2 is selected, 2 is indicated on the display for 3 seconds, in this period, sensor diagnosis is started. ormal: 20 is displayed. alfunction: The ones place digit of corresponding code number blinks 2 times on the / display. When short-circuit error, UT blinks on the display. T: If two or more sensors, or door motor malfunction, the ones place digit of corresponding code numbers blink respectively twice. iagnosis Result ode o. orresponding sensor or door motor pen alfunctioning judgment condition II1675 *: erform the self-diagnosis under sunshine. When performing indoors, aim a light (more than 60 W) at sunload sensor, otherwise code. 25 indicates despite that sunload sensor is functioning normally. T: When ambient sensor has the malfunction of open-circuit, the sensor judges that ambient temperature is extremely cold, and controls the in vehicle temperature to warmly. When performing the diagnosis of intake door motor, the target angle of R is set at 40%. The error judgment status of intake door motor is not decided by open or short circuit, it is decided by the voltage value as follows: - Short: 2.5 V or more - pen: 1.5 V or less ST-3: R TR ISIS escription When ST-3 is selected, 3 is indicated on the display for 1 second, in this period, door motor diagnosis is started. The check of door motor is performed by / auto amp. transmitting output signal to each door motor. Short 21 / UT 21 mbient sensor 42 ( 44 ) or less 100 (212 ) or more 22 / UT 22 In-vehicle sensor 42 ( 44 ) or less 100 (212 ) or more 24 / UT 24 Intake sensor 42 ( 44 ) or less 100 (212 ) or more 25 / UT 25 Sunload sensor* 33 W/m 2 (28 kcal/m 2 h) 1677 W/m 2 (1442 kcal/m 2 h) 26 / UT 26 Intake door motor (R) R angle 30% or less R angle 50% or more Reference -35, "iagnosis rocedure" -38, "iagnosis rocedure" -41, "iagnosis rocedure" -43, "iagnosis rocedure" -52, "iagnosis rocedure" -27

28 ISIS SYST (/ UT.) < SYST SRITI > [UTTI IR ITII] ormal: 30 is displayed. alfunction: The ones place digit of corresponding code number blinks 2 times on the / display. When short-circuit error, UT blinks on the display. T: If two or more door motor connectors malfunction, the ones place digit of corresponding code numbers blink respectively twice. T: When the malfunctioning condition as following figure, 31 is displayed. II1676 iagnosis Result ode o. 31 / UT / UT / UT / UT / UT / UT / UT 37 orresponding door motor ir mix door motor ode door motor alfunctioning judgment condition Short or open circuit of air mix door drive signal terminal 4 Short or open circuit of air mix door drive signal terminal 1 Short or open circuit of air mix door drive signal terminal 2 Short or open circuit of air mix door drive signal terminal 3 Short or open circuit of mode door drive signal terminal 4 Short or open circuit of mode door drive 38 / UT 38 signal terminal 3 T: If all four terminals of each door motor show an open circuit, there is probably a disconnected connector or an open circuit in door motor drive power supply harness. If a short circuit occurs in harness between terminals for each door motor drive signal, although it cannot be detected by self-diagnosis, door motor will vibrate when it operates. oor otor Starting osition Reset ressing switch during ST-3 will send a reset signal to air mix door and mode door motor to reset them to starting position. Short or open circuit of mode door drive signal terminal 1 Short or open circuit of mode door drive signal terminal 2-28 Reference -46, "iagnosis rocedure" -49, "iagnosis rocedure" II1677

29 ISIS SYST (/ UT.) < SYST SRITI > [UTTI IR ITII] uring reset operation, switch indicator and 30 blink for approximately 9 seconds. ST-4: RTI escription When ST-4 is selected, each part operation is started with indicating 4 on the display. ach time switch is pressed, the display will change to peration ontents hecks must be visually, by listening the sound or by touching air outlets with hand, etc. for improper operation. ode o. ode door position Intake door position ST-5: SSR RITI escription When ST-5 is selected, 5 is indicated on the display. ach time switch is pressed, each sensor recognition temperature is changed in order of the following: 5 mbient temperature In-vehicle temperature Intake temperature 5. T: ach sensor recognition temperature is not displayed in less than 30 ( 22 ) or more than 55 (131 ). ST-6: TRTUR STTI TRIR escription The trimmer compensates for differences in range of ±3 (±6 ) between temperature setting (displayed digitally) and temperature felt by customer. Setting rocedure Refer to -10, "Temperature Setting Trimmer". ST-7: IT RT RY UTI escription Inlet port setting can be memorized when ignition switch is turned. Inlet port setting can be selected from R (fresh air intake), R (recirculation), or o not perform the memory when ignition switch is turned. Setting rocedure Refer to -11, "Inlet ort emory unction". ir mix door position agnet clutch lower fan motor (voltage) ondenser fan signal 41 VT R ull cold 5 V 42 / R ull cold 10.5 V 43 / 20% R edium (50%) 8.5 V 44 T 80% R edium (50%) 8.5 V 45 / R ull hot 8.5 V 46 R ull hot attery voltage -29

30 ISIS SYST () (WIT ITIT Y SYST) < SYST SRITI > [UTTI IR ITII] ISIS SYST () (WIT ITIT Y SYST) IT IT : SUT-III unction ( - IT) II: 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 unction escription hanges the setting for each system function. isplays the diagnosis results judged by. onitors the reception status of communication viewed from. Refer to SUT-III operation manual. The input/output signals are displayed. The signals used to activate each device are forcibly supplied from. The part number is displayed. Read and save the vehicle specification. Write the vehicle specification when replacing. 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. System Sub system selection item iagnosis mode : pplicable item Work Support ata onitor ctive Test oor lock R Rear window defogger RR R Warning chime UZZR Interior room lamp timer IT Remote keyless entry system UTI RT T* 1 xterior lamp Wiper and washer WIR * 2 Turn signal and hazard warning lamps SR IR ITR* 3 Intelligent ey system ngine start system ITIT Y ombination switch SW ody control system VIS - TS IU Interior room lamp battery saver TTRY SVR ack door opener system TRU Vehicle security system TT R system RTI WR Signal buffer system SI UR TS TS (IR RSSUR ITR) T: *1: t models with Intelligent ey system this item is displayed, but is not used. *2: t models with rain sensor this mode is displayed, but is not used. -30

31 ISIS SYST () (WIT ITIT Y SYST) < SYST SRITI > [UTTI IR ITII] *3: This item is displayed, but is not used. RZ R T () The records the following vehicle condition at the time a particular T is detected, and displays on SUT-III. SUT screen item Indication/Unit escription Vehicle Speed km/h Vehicle speed of the moment a particular T is detected do/trip eter km Total mileage (dometer value) of the moment a particular T is detected Vehicle ondition IR ITIR S> S> > > RU> R>RU RU>URT > > > >R >S >S I ounter 0-39 I RU RI ower position status of the moment a particular T is detected While turning status from low power consumption mode to normal mode (ower supply position is ) While turning status from low power consumption mode to normal mode (ower supply position is.) While turning power supply position from to While turning power supply position from to I While turning power supply position from RU to (Vehicle is stopping and selector lever is except position.) While turning power supply position from RI to RU (rom cranking up the engine to run it) While turning power supply position from RU to (mergency stop operation) While turning power supply position from to While turning power supply position from to While turning power supply position from to While turning power supply position from I to RI While turning status from normal mode (ower supply position is.) to low power consumption mode While turning status from normal mode (ower supply position is.) to low power consumption mode ower supply position is (Ignition switch with steering is locked.) ower supply position is (Ignition switch with steering is unlocked.) ower supply position is (Ignition switch ) ower supply position is I (Ignition switch with engine stopped) ower supply position is RU (Ignition switch with engine running) ower supply position is RI (t engine cranking) The number of times that ignition switch is turned after T is detected The number is 0 when a malfunction is detected now. The number increases like after returning to the normal condition whenever ignition switch. The number is fixed to 39 until the self-diagnosis results are erased if it is over 39. IR ITIR : SUT-III unction ( - UT IR ITIR) II: T ITR isplay Item ist -31

32 ISIS SYST () (WIT ITIT Y SYST) < SYST SRITI > [UTTI IR ITII] onitor Item [Unit] ontents SI [/] isplays the blower fan status as jugged from the / auto amp. IR SW [/] isplays [ ()/ ()] status as judged from the / auto amp. -32

33 ISIS SYST () (WITUT ITIT Y SYST) < SYST SRITI > [UTTI IR ITII] ISIS SYST () (WITUT ITIT Y SYST) IT IT : SUT-III unction ( - IT) ITI IT SUT-III can display each diagnostic item using the diagnostic test modes shown following. iagnosis mode U Identification Self-iagnostic Result ata onitor ctive Test Work Support onfiguration iag Support onitor 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. System *: This item is displayed, but is not function. IR ITIR unction description part number is displayed. isplays the diagnosis results judged by. Refer to S-142, "T Index". input/output signals are displayed. The signals used to activate each device are forcibly supplied from. hanges the setting for each system function. Read and save the vehicle specification. Write the vehicle specification when replacing. onitors the reception status of communication viewed from. SUT-III sub system selection item iagnosis mode II: : pplicable item WR SURT T ITR TIV TST oor lock R Rear window defogger RR R Warning chime UZZR Interior room lamp control 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 ITIT Y* ombination switch SW Immobilizer IU Interior room lamp battery saver TTRY SVR ack door open TRU Vehicle security system TT R system RTI WR Signal buffer system SI UR U I* TS* anic alarm system I R -33

34 ISIS SYST () (WITUT ITIT Y SYST) < SYST SRITI > [UTTI IR ITII] IR ITIR : SUT-III unction ( - UT IR ITIR) T ITR isplay Item ist onitor Item [Unit] ontents I SW [/] isplays ignition switch position status as judged from ignition switch signal. SI [/] isplays the blower fan status as jugged from the / auto amp. IR SW [/] isplays [ ()/ ()] status as judged from the / auto amp. II:

35 IT SSR < T/IRUIT ISIS > [UTTI IR ITII] T/IRUIT ISIS IT SSR escription T SRITI The ambient sensor (1) is installed on the middle of radiator upper support. The ambient sensor converts the ambient temperature detected with thermistor into the voltage, and the / auto amp. inputs this voltage. II: IT TRTUR RRTI The / auto amp. inputs the temperature detected with the ambient sensor as the ambient temperature. erform the correction of the temperature detected with the ambient sensor for air conditioner control and for ambient temperature display. Since the engine heat influences on the ambient sensor during idling condition, the / auto amp. retards the ambient temperature indication of the combination meter to avoid the effect of steep temperature change. Select and use the initial value of ambient temperature data depending on the coolant temperature when turning the ignition switch from to. Use the detection temperature of the ambient sensor at low coolant temperature [less than approximately 56 (133 )]. Use the memory data (before the ignition switch is ) when the engine is warming up [approximately 56 (133 ) or more]. o not perform the correction of the ambient temperature when the detection temperature of the ambient temperature is less than approximately 20 ( 4 ). ST TRTUR RRTI The / auto amp. performs the correction to the target temperature set by the temperature control switch so as to match the temperature felt by the passengers depending on the ambient temperature detected with the ambient sensor and controls it so that the interior air temperature is always the most suitable. iagnosis rocedure II: IT SSR WR SUY IRUIT 1. Turn the ignition switch. 2. isconnect the ambient sensor connector. 3. Turn the ignition switch. 4. heck voltage between ambient sensor harness connector and the ground. onnector (+) ( ) mbient sensor Terminal Voltage (pprox.) V Is the inspection result normal? YS >> T 2. >> T IT SSR RU IRUIT TIUITY 1. Turn the ignition switch. 2. isconnect the / auto amp. connector. 3. heck continuity between ambient sensor harness connector and / auto amp harness connector. II1751ZZ -35

36 IT SSR < T/IRUIT ISIS > [UTTI IR ITII] mbient sensor / auto amp. onnector Terminal onnector Terminal Is the inspection result normal? YS >> T 3. >> Repair the harnesses or connectors. 3. IT SSR ontinuity xisted heck the ambient sensor components. Refer to -36, "omponent Inspection". Is the inspection result normal? YS >> ISTI >> Replace the ambient sensor. 4. IT SSR IRUIT 1. Turn the ignition switch. 2. isconnect the / auto amp. connector. 3. heck continuity between ambient sensor harness connector and / auto amp. harness connector. mbient sensor / auto amp. onnector Terminal onnector Terminal ontinuity xisted Is the inspection result normal? YS >> T 5. >> Repair the harnesses or connectors. 5. IT SSR SRT IRUIT heck continuity between ambient sensor harness connector and the ground. mbient sensor onnector Terminal ontinuity 53 1 ot existed Is the inspection result normal? YS >> Replace the / auto amp. >> Repair the harnesses or connectors. omponent Inspection II: IT SSR 1. Turn the ignition switch. 2. Remove the ambient sensor. Refer to -144, "xploded View". 3. heck the resistance between the ambient sensor terminals. Refer to the applicable table for the normal value. -36

37 IT SSR < T/IRUIT ISIS > [UTTI IR ITII] Terminal ondition Temperature: ( ) Resistance: kω 15 (5) (14) (23) (32) (41) (50) (59) (68) (77) (86) (95) (104) (113) 1.07 Is the inspection result normal? YS >> ISTI >> Replace the ambient sensor. -37

38 I-VI SSR < T/IRUIT ISIS > [UTTI IR ITII] I-VI SSR escription II: T SRITI The in-vehicle sensor (1) is installed to the finisher. The in-vehicle sensor converts the interior air temperature of the passenger room sucked by the aspirator detected with the thermistor into the voltage, and the / auto amp. inputs this voltage. SIRTR The aspirator (1) generates the vacuum by the air blown from the / unit assembly and draws the air of the passenger room to the invehicle sensor area via the aspirator duct. II1744ZZ : Vehicle front II1745ZZ ITRIR IR TRTUR RRTI The / auto amp. inputs the temperature detected with the in-vehicle sensor as the interior air temperature. erform the correction of the temperature detected with the in-vehicle sensor for each air conditioner control. iagnosis rocedure II: I-VI SSR WR SUY IRUIT 1. Turn the ignition switch. 2. isconnect the in-vehicle sensor connector. 3. Turn the ignition switch. 4. heck voltage between in-vehicle sensor harness connector and the ground. RI1804 onnector (+) ( ) In-vehicle sensor Terminal Voltage (pprox.) V -38

39 I-VI SSR < T/IRUIT ISIS > [UTTI IR ITII] Is the inspection result normal? YS >> T 2. >> T I-VI SSR RU IRUIT TIUITY 1. Turn the ignition switch. 2. isconnect the / auto amp. connector. 3. heck continuity between in-vehicle sensor harness connector and / auto amp. harness connector. In-vehicle sensor / auto amp. onnector Terminal onnector Terminal xisted Is the inspection result normal? YS >> T 3. >> Repair the harnesses or connectors. 3. I-VI SSR heck the in-vehicle sensor components. Refer to -39, "omponent Inspection". Is the inspection result normal? YS >> ISTI >> Replace the in-vehicle sensor. 4. I-VI SSR IRUIT 1. Turn the ignition switch. 2. isconnect the / auto amp. connector. 3. heck continuity between in-vehicle sensor harness connector and / auto amp. harness connector. In-vehicle sensor / auto amp. onnector Terminal onnector Terminal ontinuity ontinuity xisted Is the inspection result normal? YS >> T 5. >> Repair the harnesses or connectors. 5. I-VI SSR SRT IRUIT heck continuity between in-vehicle sensor harness connector and the ground. In-vehicle sensor onnector Terminal ontinuity 41 1 ot existed Is the inspection result normal? YS >> Replace the / auto amp. >> Repair the harnesses or connectors. omponent Inspection II: I-VI SSR 1. Turn the ignition switch. 2. Remove the in-vehicle sensor. Refer to -145, "xploded View". 3. heck the resistance between the in-vehicle sensor terminals. Refer to the applicable table for the normal value. -39

40 I-VI SSR < T/IRUIT ISIS > [UTTI IR ITII] Terminal ondition Temperature: ( ) Resistance: kω 15 (5) (14) (23) (32) (41) (50) (59) (68) (77) (86) (95) (104) (113) 1.07 Is the inspection result normal? YS >> ISTI >> Replace the in-vehicle sensor. -40

41 IT SSR < T/IRUIT ISIS > [UTTI IR ITII] IT SSR escription T SRITI Intake sensor (1) is located on the evaporator. The intake sensor converts the evaporator surface temperature detected with thermistor into the voltage, and the / auto amp. inputs this voltage. II: IT TRTUR RRTI The / auto amp. inputs the temperature detected with the intake sensor as the evaporator surface temperature. erform the correction of the temperature detected with the intake sensor for air conditioner control. The / auto amp. performs the correction so that the recognition intake temperature changes depending on the difference between the detected intake temperature and the recognition intake temperature. If the difference is large, the changing is early. The changing becomes slow as the difference becomes small. iagnosis rocedure II: IT SSR WR SUY IRUIT 1. Turn the ignition switch. 2. isconnect the intake sensor connector. 3. Turn the ignition switch. 4. heck voltage between intake sensor harness connector and the ground. II1749ZZ onnector (+) ( ) Intake sensor Terminal V Is the inspection result normal? YS >> T 2. >> T IT SSR RU IRUIT TIUITY Voltage (pprox.) 1. Turn the ignition switch. 2. isconnect the / auto amp. connector. 3. heck continuity between intake sensor harness connector and / auto amp. harness connector. Intake sensor / auto amp. onnector Terminal onnector Terminal xisted Is the inspection result normal? YS >> T 3. >> Repair the harnesses or connectors. 3. IT SSR heck the intake sensor components. Refer to -42, "omponent Inspection". Is the inspection result normal? -41 ontinuity