Problem Symptoms Table
AIR CONDITIONING SYSTEM
PROBLEM SYMPTOMS CHART
| Symptom | Suspected area | See |
|---|---|---|
| All functions of the A/C system do not operate | 1. IG power source circuit | IG POWER SOURCE CIRCUIT |
| 2. Back-up power source circuit | BACK-UP POWER SOURCE CIRCUIT | |
| 3. A/C amplifier | - | |
| Air Flow Control: No blower operation | 1. Blower motor circuit | BLOWER MOTOR CIRCUIT |
| 2. A/C amplifier | - | |
| Air Flow Control: No blower control | 1. Blower motor circuit | BLOWER MOTOR CIRCUIT |
| 2. A/C amplifier | - | |
| Air Flow Control: Insufficient air flow | 1. Blower motor circuit | BLOWER MOTOR CIRCUIT |
| 2. A/C amplifier | - | |
| Temperature Control: No cool air comes out | 1. Refrigerant volume | REFRIGERANT |
| 2. Refrigerant pressure | REFRIGERANT | |
| 3. Pressure switch circuit | DTC B1423/23 PRESSURE SENSOR CIRCUIT | |
| 4. Low pressure sensor circuit | LOW PRESSURE SENSOR CIRCUIT | |
| 5. Compressor circuit | AIR CONDITIONING COMPRESSOR MAGNETIC CLUTCH CIRCUIT | |
| 6. Compressor lock sensor circuit | DTC B1422/22 COMPRESSOR LOCK SENSOR CIRCUIT | |
| 7. Compressor solenoid circuit | DTC B1451/51 COMPRESSOR SOLENOID CIRCUIT | |
| 8. Air mix control servo motor circuit (Driver side) | DTC B1446/46 AIR MIX DAMPER CONTROL SERVO MOTOR CIRCUIT (DRIVER SIDE) | |
| 9. Air mix control servo motor circuit (Passenger side) | DTC B1441/41 AIR MIX DAMPER CONTROL SERVO MOTOR CIRCUIT (PASSENGER SIDE) | |
| 10. Evaporator temperature sensor circuit | DTC B1413/13 EVAPORATOR TEMPERATURE SENSOR CIRCUIT | |
| 11. Room temperature sensor circuit | DTC B1411/11 ROOM TEMPERATURE SENSOR CIRCUIT | |
| 12. Ambient temperature sensor circuit | DTC B1412/12 AMBIENT TEMPERATURE SENSOR CIRCUIT | |
| 13. Expansion valve | AIR CONDITIONING UNIT | |
| 14. A/C amplifier | - | |
| 15. ECM | - | |
| Temperature Control: No warm air comes out | 1. Air mix control servo motor circuit (Driver side) | DTC B1446/46 AIR MIX DAMPER CONTROL SERVO MOTOR CIRCUIT (DRIVER SIDE) |
| 2. Air mix control servo motor circuit (Passenger side) | DTC B1441/41 AIR MIX DAMPER CONTROL SERVO MOTOR CIRCUIT (PASSENGER SIDE) | |
| 3. Evaporator temperature sensor circuit | DTC B1413/13 EVAPORATOR TEMPERATURE SENSOR CIRCUIT | |
| 4. Room temperature sensor circuit | DTC B1411/11 ROOM TEMPERATURE SENSOR CIRCUIT | |
| 5. Ambient temperature sensor circuit | DTC B1412/12 AMBIENT TEMPERATURE SENSOR CIRCUIT | |
| 6. A/C amplifier | - | |
| 7. ECM | - | |
| Temperature Control: Output air is warmer or cooler than the set temperature or response is slow. | 1. Refrigerant volume | REFRIGERANT |
| 2. Refrigerant pressure | REFRIGERANT | |
| 3. Solar sensor circuit (Driver side) | DTC B1424/24 SOLAR SENSOR CIRCUIT (DRIVER SIDE) | |
| 4. Solar sensor circuit (Passenger side) | DTC B1421/21 SOLAR SENSOR CIRCUIT (PASSENGER SIDE) | |
| 5. Room temperature sensor circuit | DTC B1411/11 ROOM TEMPERATURE SENSOR CIRCUIT | |
| 6. Ambient temperature sensor circuit | DTC B1412/12 AMBIENT TEMPERATURE SENSOR CIRCUIT | |
| 7. Air mix control servo motor circuit (Driver side) | DTC B1446/46 AIR MIX DAMPER CONTROL SERVO MOTOR CIRCUIT (DRIVER SIDE) | |
| 8. Air mix control servo motor circuit (Passenger side) | DTC B1441/41 AIR MIX DAMPER CONTROL SERVO MOTOR CIRCUIT (PASSENGER SIDE) | |
| 9. Cool air bypass damper control servo motor circuit | DTC B1445/45 FRONT PASSENGER SEAT SIDE COOL AIR BYPASS DAMPER CONTROL SERVO MOTOR CIRCUIT | |
| 10. Air inlet control servo motor circuit | DTC B1442/42 AIR INLET DAMPER CONTROL SERVO MOTOR CIRCUIT | |
| 11. Radiator unit sub-assembly | AIR CONDITIONING UNIT | |
| 12. Expansion valve | AIR CONDITIONING UNIT | |
| 13. A/C amplifier | - | |
| 14. ECM | - | |
| Temperature control: No temperature control (only Max. cool or Max. warm) | 1. Air mix control servo motor circuit (Driver side) | DTC B1446/46 AIR MIX DAMPER CONTROL SERVO MOTOR CIRCUIT (DRIVER SIDE) |
| 2. Air mix control servo motor circuit (Passenger side) | DTC B1441/41 AIR MIX DAMPER CONTROL SERVO MOTOR CIRCUIT (PASSENGER SIDE) | |
| 3. Cool air bypass damper servo motor circuit | DTC B1445/45 FRONT PASSENGER SEAT SIDE COOL AIR BYPASS DAMPER CONTROL SERVO MOTOR CIRCUIT | |
| 4. Room temperature sensor circuit | DTC B1411/11 ROOM TEMPERATURE SENSOR CIRCUIT | |
| 5. Ambient temperature sensor circuit | DTC B1412/12 AMBIENT TEMPERATURE SENSOR CIRCUIT | |
| 6. Evaporator temperature sensor circuit | DTC B1413/13 EVAPORATOR TEMPERATURE SENSOR CIRCUIT | |
| 7. Solar sensor circuit (Driver side) | DTC B1424/24 SOLAR SENSOR CIRCUIT (DRIVER SIDE) | |
| 8. Solar sensor circuit (Passenger side) | DTC B1421/21 SOLAR SENSOR CIRCUIT (PASSENGER SIDE) | |
| 9. A/C amplifier | - | |
| Engine coolant does not warm up quickly when the engine is cold. (PTC heater does not operate) | 1. PTC heater circuit | PTC HEATER CIRCUIT |
| 2. A/C amplifier | - | |
| No air inlet control | 1. Air inlet control servo motor circuit | DTC B1442/42 AIR INLET DAMPER CONTROL SERVO MOTOR CIRCUIT |
| 2. A/C amplifier | - | |
| No air flow mode control | 1. Air outlet control servo motor circuit | DTC B1443/43 AIR OUTLET DAMPER CONTROL SERVO MOTOR CIRCUIT |
| 2. A/C amplifier | - | |
| Engine idle up does not occur, or is continuous | 1. Compressor circuit | AIR CONDITIONING COMPRESSOR MAGNETIC CLUTCH CIRCUIT |
| 2. Compressor lock sensor circuit | DTC B1422/22 COMPRESSOR LOCK SENSOR CIRCUIT | |
| 3. Compressor solenoid circuit | DTC B1451/51 COMPRESSOR SOLENOID CIRCUIT | |
| 4. A/C amplifier | - | |
| Blinking of A/C indicator | 1. Compressor solenoid circuit | DTC B1451/51 COMPRESSOR SOLENOID CIRCUIT |
| 2. A/C amplifier | - | |
| Diagnostic trouble codes are not recorded. Set mode is cleared when ignition switch is turned OFF. | 1. Back-up power source circuit | BACK-UP POWER SOURCE CIRCUIT |
| 2. A/C amplifier | - |