Automatic A/c-Heater Systems - 9-5: Diagnosis Saab 9-5 I рестайлинг

Programming Using Scan Tool

1. Access PROGRAMMING menu on scan tool. Under DISABLE AUTOMATIC RECIRCULATION - YES/NO function, select NO. If NO is selected, manual or automatic air recirculation can be selected. If YES is selected, then air recirculation can only be selected manually.
2. Under CIRCULATION PUMP - YES/NO function, select YES if vehicle is equipped with a coolant circulation pump. If vehicle is not equipped with a coolant circulation pump, select NO. If YES is selected and vehicle is not equipped with a circulation pump, an ACC control panel DTC 19 will be displayed on right side of control panel. If this occurs, select NO during ACC control module programming.
3. Under CALIBRATION FOR CLIMATE ZONE - WARM CLIMATE/COLD CLIMATE function, make the selection most appropriate for climate region. Programming for climate zone specifies direction mixed-air flap is moved during ACC control module calibration. For WARM CLIMATE, calibration is toward maximum cold. For COLD CLIMATE, calibration is toward maximum heat. This function ensures that mixed-air flap does not leak when in position used most often for selected climate zone.

SELF-DIAGNOSTICS

The self-diagnostic function detects abnormal conditions of A/C control unit, related sensors and wiring. Self-diagnostic function includes automatic control back-up, which provides substitute value in case of system failure.

RETRIEVING DIAGNOSTIC TROUBLE CODES

1. When ACC control module calibration is completed, any detected DTCs will be stored. During ACC control module calibration, the number of DTCs detected will be displayed in place of driver's side temperature (left side of ACC panel). A DTC number (01-23) will be displayed for 3 seconds in place of passenger's side temperature (right side of ACC panel). Saab Tech 2 or OBD-II compliant scan tool is necessary to retrieve or erase Diagnostic Trouble Codes (DTCs).
2. Connect scan tool to Data Link Connector (DLC) located under instrument panel, below steering column. Turn ignition on. Following scan tool manufacturer's instructions, read and note DTCs. See «ACC CONTROL MODULE DIAGNOSTIC TROUBLE CODES»(ref-97913-S24095987722001051400000) and «DICE CONTROL MODULE DIAGNOSTIC TROUBLE CODES»(ref-97913-S33156639992001051400000) tables. Because a functional problem in one system can be caused from a problem in another system it is important to read DTCs from all vehicle systems. Compare DTCs with customer complaint. DTC that most closely corresponds with customer complaint is probably caused by primary malfunction.

ACC CONTROL MODULE DIAGNOSTIC TROUBLE CODES

DICE CONTROL MODULE DIAGNOSTIC TROUBLE CODES

Fault Symptoms

Temperature in passenger compartment (cabin) may seem too hot or too cold in relation to selected temperature. When DTC sets, ACC control module will use last valid value as a default until ignition is turned off. When ignition is turned on, a zero value will be used as a default.

Diagnostic Procedure

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC) located under steering column. Using scan tool, contact ACC control module and check for DTC B2945. If DTC B2945 is not displayed, go to next step. If DTC B2945 is displayed, go to «DTC B2945: SENSOR GROUND»(ref-97913-S25228804982001051400000).
2. Locate solar sensor under windshield, at center of dashboard. Disconnect solar sensor 4-pin connector. Turn ignition on. Connect a test light between ground and harness side of sensor 4-pin connector terminal No. 1 (Yellow/Green wire). (Scheme 6) If test light comes on, go to next step. If test light does not come on, repair open in Yellow/Green wire between solar sensor and ACC control module. When repair is complete, go to step 5.
3. Turn ignition on. Connect a test light between harness side of solar sensor 4-pin connector terminal No. 1 (Yellow/Green wire) and terminal No. 4 (Blue/Red wire on 2000 models; Red/Blue wire on 2001 models). Test light should come on faintly. If test light comes on, go to next step. If test light does not come on, repair open or short in wire between solar sensor and ACC control module. When repair is complete, go to step 5.
4. Turn ignition off. Disconnect ACC control module 39-pin connector. see scheme 7 Check for continuity in White wire between harness side of solar sensor 4-pin connector terminal No. 2 and ACC control module 39-pin connector terminal No. 17. If continuity exists, replace solar sensor. If continuity does not exist, repair open in White wire. When repair is complete, go to next step.
5. Using scan tool, clear all DTCs from all systems. Recheck A/C system operation for original complaint. If A/C system is operating properly and no DTC has been detected, repair is complete. If a DTC has been detected, a control module may need to be replaced. See «CONTROL MODULES»(ref-97913-S40998985912001051400000) under SYSTEM TESTS.

Scheme 6

Temperature in cabin may seem too hot or too cold in relation to selected temperature. When DTC sets, ACC control module will use a default value based on relative position of mixed-air flap multiplied by engine coolant temperature.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC) located under steering column. Using scan tool, contact ACC control module and check for DTC B2945. If DTC B2945 is not displayed, go to next step. If DTC B2945 is displayed, go to «DTC B2945: SENSOR GROUND»(ref-97913-S25228804982001051400000).
2. Locate left mixed-air temperature sensor connector on front side of A/C-heater assembly. (Scheme 7) Disconnect Black 10-pin connector. Connect a test light between battery voltage and harness side of Black 10-pin connector terminal No. 10 (Brown/White wire). (Scheme 8) If test light comes on, go to next step. If test light does not come on, repair open in Brown/White wire between Black 10-pin connector and ACC control module 39-pin connector terminal No. 38. When repair is complete, go to step 5.
3. Turn ignition on. Using scan tool, contact ACC control module and read ACTUAL MIXED-AIR TEMPERATURE LH voltage. If 4.7-5.0 volts is indicated, go to next step. If 4.7-5.0 volts is not indicated, repair open in Brown/Orange wire between Black 10-pin connector terminal No. 9 and ACC control module 39-pin connector terminal No. 19. see scheme 7and (Scheme 8). When repair is complete, go to step 5.
4. Connect a fused jumper wire between harness side of Black 10-pin connector terminal No. 9 (Brown/Orange wire) and terminal No. 10 (Brown/White wire). Using scan tool, contact ACC control module and read ACTUAL MIXED-AIR TEMPERATURE LH voltage. If zero volts is not indicated, repair open in Brown/Orange wire and go to next step. If zero volts is indicated, replace left mixed-air temperature sensor. See «MIXED-AIR TEMPERATURE SENSOR (LEFT SIDE)»(ref-97913-S17794058442001051400000) under REMOVAL & INSTALLATION. After repairs are complete, go to next step.
5. Using scan tool, clear all DTCs from all systems. Recheck A/C system operation for original complaint. If A/C system is operating properly and no DTC has been detected, repair is complete. If a DTC has been detected, a control module may need to be replaced. See «CONTROL MODULES»(ref-97913-S40998985912001051400000) under SYSTEM TESTS.

Scheme 7

Scheme 8

Temperature in passenger compartment (cabin) may seem too hot or too cold in relation to selected temperature. When DTC sets, ACC control module will initially use ambient (outside) temperature as a default value when ignition is turned on. Default value used will then be a mean value of calculated temperatures at head height of front seats.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC) located under steering column. Using scan tool, contact ACC control module and check for DTC B2945. If DTC B2945 is not displayed, go to next step. If DTC B2945 is displayed, go to «DTC B2945: SENSOR GROUND»(ref-97913-S25228804982001051400000) .
2. Locate cabin temperature sensor in dome light roof panel, near rear view mirror. Disconnect sensor 2-pin connector (connector terminals No. 5 and 6). Connect a test light between battery voltage and harness side connector terminal No. 5 (Yellow/White wire). If test light comes on, go to next step. If test light does not come on, repair Yellow/White wire between cabin temperature sensor and ACC control module 39-pin connector terminal No. 39 (Yellow/White wire). When repairs are complete, go to step 5 .
3. Turn ignition on. Using scan tool, contact ACC control module and read CABIN TEMPERATURE SENSOR voltage. If 4.7-5.0 volts is indicated, go to next step. If 4.7-5.0 volts is not indicated, repair open in Orange/White wire between cabin temperature sensor connector terminal No. 6 (Brown/White wire) and ACC control module 39-pin connector terminal No. 20 (Orange/White wire). See «WIRING DIAGRAMS»(ref-97913-S32792199362001051400000) . When repair is complete, go to step 5 .
4. Connect a fused jumper wire between cabin temperature sensor harness side connector terminals No. 5 (Yellow/White wire) and No. 6 (Brown/White wire). Turn ignition on. Using scan tool, contact ACC control module and read CABIN TEMPERATURE SENSOR voltage. If zero volts is indicated, replace cabin temperature sensor. See «CABIN TEMPERATURE SENSOR»(ref-97913-S36329346662001051400000) under REMOVAL & INSTALLATION. If zero volts is not indicated, repair open in Brown/White wire. When repairs are completed, go to next step.
5. Using scan tool, clear all DTCs from all systems. Recheck A/C system operation for original complaint. If A/C system is operating properly and no DTC has been detected, repair is complete. If a DTC has been detected, a control module may need to be replaced. See «CONTROL MODULES»(ref-97913-S40998985912001051400000) under SYSTEM TESTS.

ACC control panel does not function.

Replace ACC control module with a known-good ACC control module. See ACC CONTROL MODULE under REMOVAL & INSTALLATION. Using scan tool, clear all DTCs from all systems. Recheck A/C system operation for original complaint. If A/C system is operating properly and no DTC has been detected, repair is complete. If a DTC has been detected, a control module may need to be replaced. See CONTROL MODULES under SYSTEM TESTS.

Temperature in cabin may seem too cold in relation to selected temperature and right side cabin temperature cannot be adjusted.

1. Disconnect right side mixed-air stepping motor 6-pin connector. see scheme 2 Connect a Red/Green LED test light between stepping motor 6-pin connector terminal No. 1 (White/Black wire) and terminal No. 3 (White wire). See «WIRING DIAGRAMS»(ref-97913-S32792199362001051400000). Simultaneously press AUTO and OFF buttons on ACC control panel to activate ACC system calibration. see scheme 1 If both LEDs come on, go to next step. If LEDs do not come on, repair White wire and/or White/Black wire between mixed-air motor and ACC control module 39-pin connector terminal No. 10 (White/Black wire on 2000 models; Black/White wire on 2001 models) and terminal No. 29 (White wire). see scheme 7 When repairs are complete, go to step 3.
2. Connect a Red/Green LED test light between stepping motor 6-pin connector terminals No. 4 (Black/Violet wire) and No. 6 (Red/Blue wire). Simultaneously press AUTO and OFF buttons on ACC control panel to activate ACC system calibration. If LEDs do not come on, repair suspect wire between mixed-air stepping motor and ACC control module 39-pin connector terminals No. 11 (Green/Blue wire) and/or No. 30 (Black/Violet wire). If both LEDs come on, replace right side mixed-air stepping motor. See «MIXED-AIR FLAP STEPPING MOTOR (RIGHT SIDE)»(ref-97913-S00660479812001051400000) under REMOVAL & INSTALLATION. When repairs are complete, go to next step.
3. Using scan tool, clear DTCs from all systems. Recheck A/C system operation for original complaint. If A/C system is operating properly and no DTC has been detected, repair is complete. If a DTC has been detected, a control module may need to be replaced. See «CONTROL MODULES»(ref-97913-S40998985912001051400000) under SYSTEM TESTS.

Temperature in cabin may seem too cold in relation to selected temperature and right side cabin temperature cannot be adjusted.

1. Remove right side mixed-air stepping motor without disconnecting 6-pin connector. see scheme 2 Simultaneously press AUTO and OFF buttons on ACC control panel to activate ACC system calibration. see scheme 1 If stepping motor operates, go to next step. If stepping motor does not operate, replace right side mixed-air flap stepping motor. See «MIXED-AIR FLAP STEPPING MOTOR (RIGHT SIDE)»(ref-97913-S00660479812001051400000) under REMOVAL & INSTALLATION. When repairs are complete, go to step 3.
2. Manually operate mixed-air flap to ensure that flap is not sticking, loose or damaged. Repair mixed-air flap as necessary. If flap is okay, install right side mixed-air stepping motor and calibrate ACC control module. See «ACC CONTROL MODULE CALIBRATION»(ref-97913-S31322663742001051400000) under PROGRAMMING. After repairs and calibration, go to next step.
3. Using scan tool, clear DTCs from all systems. Recheck A/C system operation for original complaint. If A/C system is operating properly and no DTC has been detected, repair is complete. If a DTC has been detected, a control module may need to be replaced. See «CONTROL MODULES»(ref-97913-S40998985912001051400000) under SYSTEM TESTS.

Temperature in passenger compartment (cabin) may seem too cold in relation to selected temperature and right side cabin temperature cannot be adjusted.

1. Remove right side mixed-air stepping motor without disconnecting 6-pin connector. see scheme 2 Simultaneously press AUTO and OFF buttons on ACC control panel to activate ACC system calibration. see scheme 1 If stepping motor operates, go to next step. If stepping motor does not operate, replace right side mixed-air flap stepping motor. Go to step 3.
2. Manually operate mixed-air flap to ensure that flap is not sticking, loose or damaged. If flap is okay, install right side mixed-air stepping motor and calibrate ACC control module. See «ACC CONTROL MODULE CALIBRATION»(ref-97913-S31322663742001051400000) under PROGRAMMING. Repair mixed-air flap as necessary. After repairs and calibration, go to next step.
3. Using scan tool, clear DTCs from all systems. Recheck A/C system operation for original complaint. If A/C system is operating properly and no DTC has been detected, repair is complete. If a DTC has been detected, a control module may need to be replaced. See «CONTROL MODULES»(ref-97913-S40998985912001051400000) under SYSTEM TESTS.

Temperature in cabin may seem too cold in relation to selected temperature and right side cabin temperature cannot be adjusted. When DTC sets, ACC control module will use a default value based on relative position of mixed-air flap multiplied by engine coolant temperature.

1. Turn ignition off. Connect scan tool to Data Link Connector (DLC) located under steering column. Using scan tool, contact ACC control module and check for DTC B2945. If DTC B2945 is not displayed, go to next step. If DTC B2945 is displayed, go to «DTC B2945: SENSOR GROUND»(ref-97913-S25228804982001051400000).
2. Locate left mixed-air temperature sensor Gray 10-pin connector on front side of A/C-heater assembly. Disconnect Gray 10-pin connector. Connect a test light between battery voltage and harness side of Gray 10-pin connector terminal No. 10 (Violet wire). (Scheme 8) See «WIRING DIAGRAMS»(ref-97913-S32792199362001051400000). If test light illuminates, go to next step. If test light does not illuminate, repair open in Violet wire between Gray 10-pin connector and ACC control module 39-pin connector terminal No. 37. When repair is complete, go to step 5.
3. Turn ignition on. Using scan tool, contact ACC control module and read ACTUAL MIXED-AIR TEMPERATURE RH voltage. If 4.7-5.0 volts is indicated, go to next step. If 4.7-5.0 volts is not indicated, repair open in Brown/Red wire between Gray 10-pin connector terminal No. 9 and ACC control module 39-pin connector terminal No. 18. see scheme 7and (Scheme 8). When repair is complete, go to step 5.
4. Connect a fused jumper wire between harness side of Gray 10-pin connector terminal No. 9 (Brown/Red wire) and terminal No. 10 (Violet wire). Using scan tool, contact ACC control module and read ACTUAL MIXED-AIR TEMPERATURE RH voltage. If zero volts is not indicated, repair open in Brown/Red wire and go to next step. If zero volts is indicated, replace right mixed-air temperature sensor. See «MIXED-AIR FLAP STEPPING MOTOR (RIGHT SIDE)»(ref-97913-S00660479812001051400000) under REMOVAL & INSTALLATION. After repairs are complete, go to next step.
5. Using scan tool, clear all DTCs from all systems. Recheck A/C system operation for original complaint. If A/C system is operating properly and no DTC has been detected, repair is complete. If a DTC has been detected, a control module may need to be replaced. See «CONTROL MODULES»(ref-97913-S40998985912001051400000) under SYSTEM TESTS.

Evaporator temperature sensor stops functioning, which means that A/C system does not supply cold air.

1. Disconnect evaporator temperature sensor 2-pin connector located at right side of A/C-heater assembly. see scheme 4 Connect a test light between battery voltage and harness side of sensor 2-pin connector terminal No. 2 (Green/Red wire on 2000 models; Red/Green wire on 2001 models). If test light illuminates, go to next step. If test light does not illuminate, repair open or short to battery voltage in wire between sensor and DICE control module 70-pin connector terminal No. 30. see scheme 5 When repairs are completed, go to step 3.
2. Turn ignition on. Measure voltage between harness side of evaporator sensor 2-pin connector terminals. Measure voltage with DVOM positive lead on terminal No. 1 (Blue/White wire) and negative lead on terminal No. 2 (Green/Red wire on 2000 models; Red/Green wire on 2001 models). If voltage is 6.5-8.5 volts, replace evaporator temperature sensor. See «EVAPORATOR TEMPERATURE SENSOR»(ref-97913-S10747369902001051400000) under REMOVAL & INSTALLATION. If voltage is not 6.5-8.5 volts, repair open in Blue/White wire between sensor terminal No. 1 and DICE control module 70-pin connector terminal No. 10. see scheme 5 When repairs are completed, go to next step.
3. Using scan tool, clear DTCs from all systems. Recheck A/C system operation for original complaint. If A/C system is operating properly and no DTC has been detected, repair is complete. If a DTC has been detected, a control module may need to be replaced. See «CONTROL MODULES»(ref-97913-S40998985912001051400000) under SYSTEM TESTS.

A/C system does not supply cold air.

1. Disconnect A/C pressure sensor 3-pin connector located end of condenser. see scheme 4 Turn ignition on. Measure voltage on harness side of sensor 3-pin connector with DVOM positive lead on terminal "B" (Blue/Yellow wire on 2000 models; Yellow/Blue wire on 2001 models) and negative lead on battery negative terminal. If voltage is 4.7-5.5 volts, go to next step. If voltage is not 4.7-5.5 volts, repair open in Blue/Yellow wire between 3-pin terminal "B" and DICE control module 70-pin connector terminal No. 38. see scheme 5 When repairs are complete, go to step 5.
2. Measure voltage on harness side of sensor 3-pin connector with DVOM positive lead on terminal "A" (Orange wire) and negative lead on terminal "B" (Blue/Yellow wire on 2000 models; Yellow/Blue wire on 2001 models). If voltage is 4.7-5.5 volts, go to next step. If voltage is not 4.7-5.5 volts, repair open in Orange wire between 3-pin connector terminal "A" and DICE control module 70-pin connector terminal No. 54. When repairs are complete, go to step 5.
3. Connect scan tool to Data Link Connector (DLC) located under steering column. Using scan tool, contact DICE control module. Connect a fused jumper wire between harness side of sensor 3-pin connector terminal "B" (Blue/Yellow wire on 2000 models; Yellow/Blue wire on 2001 models) and terminal "C" (Blue/Green wire on 2000 models; Green/Blue wire on 2001 models). Turn ignition on. Using scan tool, read A/C PRESSURE value. If A/C pressure value is 406-508 psi (28.6-35.7 kg/cm 2 ), go to next step. If A/C pressure value is not 406-508 psi (28.6-35.7 kg/cm 2 ), repair open or short to ground in Blue/Green wire between sensor 3-pin connector terminal "C" and DICE control module 70-pin connector terminal No. 9. When repairs are complete, go to step 5.
4. Connect a fused jumper wire between harness side of sensor 3-pin connector terminal "A" (Orange wire) and terminal "C" (Blue/Green wire on 2000 models; Green/Blue wire on 2001 models). Turn ignition on. Using scan tool, read A/C PRESSURE value. If A/C pressure value is zero psi (zero kg/cm 2 ), replace A/C pressure sensor. See «A/C PRESSURE SENSOR»(ref-97913-S05404597742001051400000) under REMOVAL & INSTALLATION. If A/C pressure value is not zero psi (zero kg/cm 2 ), repair open or short to battery voltage in wire between sensor 3-pin connector terminal "C" and DICE control module 70-pin connector terminal No. 9. When repairs are complete, go to next step.
5. Using scan tool, clear all DTCs from all systems. Recheck A/C system operation for original complaint. If A/C system is operating properly and no DTC has been detected, repair is complete. If a DTC has been detected, a control module may need to be replaced. See «CONTROL MODULES»(ref-97913-S40998985912001051400000) under SYSTEM TESTS.

Temperature in cabin may seem too hot or too cold in relation to selected temperature. When DTC sets, ACC control module will turn off activation output to heater core shutoff valve solenoid.

1. Disconnect heater core shutoff valve control solenoid valve 2-pin connector. see scheme 2 See «WIRING DIAGRAMS»(ref-97913-S32792199362001051400000). Turn ignition on. Connect a test light between ground and harness side of control solenoid valve 2-pin connector terminal No. 1 (Violet wire). If test light illuminates, go to next step. If test light does not illuminate, repair open or short in Violet wire. When repair is complete, go to step 3.
2. Connect a fuse jumper wire between harness side of control solenoid valve 2-pin connector terminal No. 1 (Violet wire) and terminal No. 2 (White/Green wire on 2000 models; Green/White wire on 2001 models). Connect scan tool to Data Link Connector (DLC) located under steering column. Using scan tool, contact ACC control module and activate SOLENOID (ON). Test light should be off and come on when solenoid is activated. If test light does not come on, repair open in White/Green wire. If test light comes on, replace heater core shutoff valve control solenoid valve. see scheme 2 When repair is complete, go to next step.
3. Using scan tool, clear DTCs from all systems. Recheck A/C system operation for original complaint. If A/C system is operating properly and no DTC has been detected, repair is complete. If a DTC has been detected, a control module may need to be replaced. See «CONTROL MODULES»(ref-97913-S40998985912001051400000) under SYSTEM TESTS.

Temperature in cabin may seem too cold in relation to selected temperature. When DTC sets, ACC control module will turn off activation output to circulation pump.

1. Coolant circulation pump is located behind power brake booster. Disconnect circulation pump 2-pin connector. Connect a test light between ground and circulation pump harness side 2-pin connector terminal No. 2 (Red wire). see scheme 2 If test light illuminates, go to next step. If test light does not illuminate, repair open or short in Red wire between fuse No. 8 (15-amp) and coolant circulation pump connector. When repair is complete, go to step 3.
2. Connect test light between harness side 2-pin connector terminals No. 1 (White wire) and No. 2 (Red wire). Using scan tool, contact ACC control module and activate circulation pump. If test light comes on when circulation pump is activated, replace coolant circulation pump. see scheme 2 If test light does not come on, repair open in White wire between circulation pump and ACC control module. When repair is complete, go to next step.
3. Using scan tool, clear DTCs from all systems. Recheck A/C system operation for original complaint. If A/C system is operating properly and no DTC has been detected, repair is complete. If a DTC has been detected, a control module may need to be replaced. See «CONTROL MODULES»(ref-97913-S40998985912001051400000) under SYSTEM TESTS.

Temperature in cabin may seem too cold or too hot in relation to selected temperature. Air distribution does not correspond with illuminated symbol in ACC panel display.

1. Disconnect air distribution flap stepping motor 6-pin connector. see scheme 2 Connect a Red/Green LED test light between stepping motor harness side 6-pin connector terminal No. 1 (Red/White wire) and terminal No. 3 (White/Yellow wire). Simultaneously press AUTO and OFF buttons on ACC control panel to activate ACC system calibration. see scheme 1 If LEDs do not come on, repair Red/White wire and/or White/Yellow wire between stepping motor and ACC control module 39-pin connector terminal No. 8 (Red/White wire) and terminal No. 27 (White/Yellow wire on 2000 models; Yellow/White wire on 2001 models). see scheme 7 When repairs are complete, go to step 3. If both LEDs come on, go to next step.
2. Connect a Red/Green LED test light between stepping motor 6-pin connector terminal No. 4 (Yellow/White wire) and terminal No. 6 (Yellow/Brown wire). Simultaneously press AUTO and OFF buttons on ACC control panel to activate ACC system calibration. If both LEDs come on, replace air distribution flap stepping motor. See «AIR DISTRIBUTION FLAP STEPPING MOTOR»(ref-97913-S29679785032001051400000) under REMOVAL & INSTALLATION. If LEDs do not come on, repair Yellow/White wire and/or Yellow/Blue wire between stepping motor and ACC control module 39-pin connector terminal No. 9 (Red/Blue wire) and terminal No. 28 (Red/Violet wire). After repairs are complete, go to next step.
3. Using scan tool, clear all DTCs from all systems. Recheck A/C system operation for original complaint. If A/C system is operating properly and no DTC has been detected, repair is complete. If a DTC has been detected, a control module may need to be replaced. See «CONTROL MODULES»(ref-97913-S40998985912001051400000) under SYSTEM TESTS.

Temperature in cabin may seem too cold or too hot in relation to selected temperature. Air distribution does not correspond with illuminated symbol in ACC panel display.

1. Remove air distribution flap stepping motor without disconnecting 6-pin connector. see scheme 2 Simultaneously press AUTO and OFF buttons on ACC control panel to activate ACC system calibration. see scheme 1 If stepping motor operates, go to next step. If stepping motor does not operate, replace air distribution flap stepping motor. See «AIR DISTRIBUTION FLAP STEPPING MOTOR»(ref-97913-S29679785032001051400000) under REMOVAL & INSTALLATION. When repairs are complete, go to step 3.
2. Manually operate air distribution flap to ensure that flap is not sticking, loose or damaged. Repair air distribution flap as necessary. If flap is okay, install air distribution flap stepping motor and calibrate ACC control module. See «ACC CONTROL MODULE CALIBRATION»(ref-97913-S31322663742001051400000) under PROGRAMMING. After repairs and calibration, go to next step.
3. Using scan tool, clear DTCs from all systems. Recheck A/C system operation for original complaint. If A/C system is operating properly and no DTC has been detected, repair is complete. If a DTC has been detected, a control module may need to be replaced. See «CONTROL MODULES»(ref-97913-S40998985912001051400000) under SYSTEM TESTS.

Temperature in cabin may seem too cold or too hot in relation to selected temperature. Air distribution does not correspond with illuminated symbol in ACC panel display.

1. Remove air distribution flap stepping motor without disconnecting 6-pin connector. see scheme 2 Simultaneously press AUTO and OFF buttons on ACC control panel to activate ACC system calibration. see scheme 1 If stepping motor operates, go to next step. If stepping motor does not operate, replace air distribution flap stepping motor. See «AIR DISTRIBUTION FLAP STEPPING MOTOR»(ref-97913-S29679785032001051400000) under REMOVAL & INSTALLATION. When repairs are complete, go to step 3.
2. Manually operate air distribution flap to ensure that flap is not sticking, loose or damaged. Repair air distribution flap as necessary. If flap is okay, install air distribution flap stepping motor and calibrate ACC control module. See «ACC CONTROL MODULE CALIBRATION»(ref-97913-S31322663742001051400000) under PROGRAMMING. After repairs and calibration, go to next step.
3. Using scan tool, clear DTCs from all systems. Recheck A/C system operation for original complaint. If A/C system is operating properly and no DTC has been detected, repair is complete. If a DTC has been detected, a control module may need to be replaced. See «CONTROL MODULES»(ref-97913-S40998985912001051400000) under SYSTEM TESTS.

There is misting and/or bad air in passenger compartment (cabin). Temperature in cabin may seem too hot in relation to selected temperature. When DTC sets, ACC control module will turn off activation output air recirculation stepping motor.

1. Disconnect air recirculation stepping motor 2-pin connector located on right side of A/C-heater assembly. Connect a Red/Green LED test light between harness side 2-pin connector terminal No. 1 (Green/White wire) and terminal No. 2 (Red/White wire). Turn ignition on. Press ACC control panel air recirculation button on and off several times to activate air recirculation flap stepping motor. Both Red and Green LEDs should alternately come on as air recirculation is switched between outside air and recirculated air. If both LEDs do not alternately come on, repair open or short in Green/White wire or Red/White wire. If both LEDs alternately come on, replace air recirculation flap stepping motor. See «AIR RECIRCULATION FLAP MOTOR»(ref-97913-S28374162882001051400000) under REMOVAL & INSTALLATION. When repairs are completed, go to next step.
2. Using scan tool, clear all DTCs from all systems. Recheck A/C system operation for original complaint. If A/C system is operating properly and no DTC has been detected, repair is complete. If a DTC has been detected, a control module may need to be replaced. See «CONTROL MODULES»(ref-97913-S40998985912001051400000) under SYSTEM TESTS.

Blower motor cannot be operated from ACC control panel.

1. Disconnect blower motor control module 4-pin connector located on right side of A/C-heater assembly. see scheme 6 Measure voltage between ground and blower motor control module 4-pin connector terminal No. 1 (Blue/Green wire on 2000 models; Green/Blue wire on 2001 models). Turn ignition on. Using blower motor speed control buttons on ACC control panel, increase blower motor speed in short steps.
2. If voltage is 0-5 volts in short steps from minimum to maximum blower motor speed, replace blower motor control module. See «BLOWER MOTOR CONTROL MODULE»(ref-97913-S07498389132001051400000) under REMOVAL & INSTALLATION. If voltage is not as specified, repair open or short in wire between blower motor control module and ACC control module 39-pin connector terminal No. 14 (Blue/Green wire on 2000 models; Green/Blue wire on 2001 models). When repairs are completed, go to next step.
3. Using scan tool, clear DTCs from all systems. Recheck A/C system operation for original complaint. If A/C system is operating properly and no DTC has been detected, repair is complete. If a DTC has been detected, a control module may need to be replaced. See «CONTROL MODULES»(ref-97913-S40998985912001051400000) under SYSTEM TESTS.

Temperature in passenger compartment (cabin) may seem too cold or too hot in relation to selected temperature.

1. Disconnect left mixed-air flap stepping motor 6-pin connector located on left side of A/C-heater assembly. Connect a Red/Green LED test light between harness side 6-pin connector terminal No. 1 (Violet/White wire) and terminal No. 3 (Green/Yellow wire). See «WIRING DIAGRAMS»(ref-97913-S32792199362001051400000) . Press ACC control panel AUTO and OFF buttons to activate stepping motor calibration. If both LEDs come on, go to next step. If LEDs do not come on, repair short or open in Violet/White wire and/or Green/Yellow wire. When repairs are complete, go to step 3 .
2. Connect a Red/Green LED test light between harness side 6-pin connector terminal No. 4 (Yellow/White wire) and terminal No. 6 (Yellow/Brown wire). Press ACC control panel AUTO and OFF buttons to activate stepping motor calibration. If both LEDs come on, replace left mixed-air flap stepping motor. See «MIXED-AIR FLAP STEPPING MOTOR (LEFT SIDE)»(ref-97913-S26207386752001051400000) under REMOVAL & INSTALLATION. If LEDs do not come on, repair short or open in Yellow/White wire and/or Yellow/Brown wire. When repairs are complete, go to next step.
3. Using scan tool, clear DTCs from all systems. Recheck A/C system operation for original complaint. If A/C system is operating properly and no DTC has been detected, repair is complete. If a DTC has been detected, a control module may need to be replaced. See «CONTROL MODULES»(ref-97913-S40998985912001051400000) under SYSTEM TESTS.

Temperature in cabin may seem too cold or too hot in relation to selected temperature.

1. Remove left side mixed-air stepping motor without disconnecting 6-pin connector. see scheme 2 Simultaneously press AUTO and OFF buttons on ACC control panel to activate ACC system calibration. see scheme 1 If stepping motor operates, go to next step. If stepping motor does not operate, replace left side mixed-air flap stepping motor. See «MIXED-AIR FLAP STEPPING MOTOR (LEFT SIDE)»(ref-97913-S26207386752001051400000) under REMOVAL & INSTALLATION. When repairs are complete, go to step 3.
2. Manually operate mixed-air flap to ensure that flap is not sticking, loose or damaged. Repair mixed-air flap as necessary. If flap is okay, install mixed-air flap stepping motor and calibrate ACC control module. See «ACC CONTROL MODULE CALIBRATION»(ref-97913-S31322663742001051400000) under PROGRAMMING. After repairs and calibration, go to next step.
3. Using scan tool, clear all DTCs from all systems. Recheck A/C system operation for original complaint. If A/C system is operating properly and no DTC has been detected, repair is complete. If a DTC has been detected, a control module may need to be replaced. See «CONTROL MODULES»(ref-97913-S40998985912001051400000) under SYSTEM TESTS.

Temperature in cabin may seem too cold or too hot in relation to selected temperature.

1. Remove left side mixed-air stepping motor without disconnecting 6-pin connector. see scheme 2 Simultaneously press AUTO and OFF buttons on ACC control panel to activate ACC system calibration. see scheme 1 If stepping motor operates, go to next step. If stepping motor does not operate, replace left side mixed-air flap stepping motor. See «MIXED-AIR FLAP STEPPING MOTOR (LEFT SIDE)»(ref-97913-S26207386752001051400000) under REMOVAL & INSTALLATION. When repairs are complete, go to step 3.
2. Manually operate mixed-air flap to ensure that flap is not sticking, loose or damaged. Repair mixed-air flap as necessary. If flap is okay, install mixed-air flap stepping motor and calibrate ACC control module. See «ACC CONTROL MODULE CALIBRATION»(ref-97913-S31322663742001051400000) under PROGRAMMING. After repairs and calibration, go to next step.
3. Using scan tool, clear DTCs from all systems. Recheck A/C system operation for original complaint. If A/C system is operating properly and no DTC has been detected, repair is complete. If a DTC has been detected, a control module may need to be replaced. See «CONTROL MODULES»(ref-97913-S40998985912001051400000) under SYSTEM TESTS.

Temperature in passenger compartment (cabin) may seem too cold or too hot in relation to selected temperature.

1. Turn ignition off. Disconnect ACC control module 39-pin connector. Check for continuity between ground and harness side of ACC control module 39-pin connector terminal No. 1 (Black wire). see scheme 7 If continuity exists, go to next step. If continuity does not exist, repair open in Black wire. When repairs are completed, go to step 6.
2. Connect a test light between harness side of control module 39-pin connector terminal No. 1 (Black wire) and terminal No. 36 (Blue/Red wire on 2000 models; Red/Blue wire on 2001 models). Turn ignition on. If test light does not come on, go to next step. If test light comes on, repair short to battery voltage in wire between control module and solar sensor. When repairs are completed, go to step 6.
3. Connect a test light between harness side of control module 39-pin connector terminal No. 1 (Black wire) and terminal No. 37 (Violet wire). Turn ignition on. If test light does not come on, go to next step. If test light comes on, repair short to battery voltage in Violet wire between control module and right side mixed-air temperature sensor. When repairs are completed, go to step 6.
4. Connect a test light between harness side of control module 39-pin connector terminal No. 1 (Black wire) and terminal No. 38 (Brown/White wire). Turn ignition on. If test light does not come on, go to next step. If test light comes on, repair short to battery voltage in Brown/White wire between control module and left side mixed-air temperature sensor. When repairs are completed, go to step 6.
5. Connect a test light between harness side of control module 39-pin connector terminal No. 1 (Black wire) and terminal No. 39 (Yellow/White wire). Turn ignition on. If test light does not come on, go to next step. If test light comes on, repair short to battery voltage in Yellow/White wire When repairs are completed, go to next step.
6. Using scan tool, clear DTCs from all systems. Recheck A/C system operation for original complaint. If A/C system is operating properly and no DTC has been detected, repair is complete. If A/C system is not operating properly and/or a DTC has been detected, ACC control module may need to be replaced. See «CONTROL MODULES»(ref-97913-S40998985912001051400000) under SYSTEM TESTS.

ACC CONTROL MODULE PIN VOLTAGE TEST

Note. Voltage and resistance tests should be performed using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance, unless otherwise specified. Other tests will require either a lab scope or a logic probe.

Before performing pin voltage tests, ensure ACC control module is supplied with power (terminals No. 4 and No. 22) and ground (terminal No. 1). To ensure changes in circuit polarity are correctly detected, connect positive (Red) lead to first terminal listed and negative (Black) lead to second terminal listed.

When instructed to operate an ACC system component, press appropriate button on ACC control panel. see scheme 1 Turn ignition on (when instructed).

Expected test values listed are approximate. If test values are not as specified, inspect suspect circuit and related components. Perform repairs as necessary. If all test values are as specified, replace ACC control module. See CONTROL MODULES under SYSTEM TESTS.

Remove ACC control module from instrument panel to gain access to 39-pin connector. See ACC CONTROL MODULE under REMOVAL & INSTALLATION. Ensure ACC control module 39-pin connector is properly connected and terminals are clean and tight. Backprobe ACC control module 39-pin connector between specified terminals. see scheme 7 See ACC CONTROL MODULE PIN VOLTAGE SPECIFICATIONS table.

ACC CONTROL MODULE PIN VOLTAGE SPECIFICATIONS