Problem Symptoms Table
HINT:
- Use the table below to help determine the cause of the problem symptom. The potential causes of the symptoms are listed in order of probability in the "Suspected area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
Air conditioning system
PROBLEM SYMPTOMS TABLE - AIR CONDITIONING SYSTEM
| Symptom | Suspected area | See |
|---|---|---|
| All functions of A/C system do not operate | 1. ECU-IG RH, A/C fuse | - |
| 2. Wire harness or connector | - | |
| 3. IG power source circuit | IG POWER SOURCE CIRCUIT | |
| 4. Back-up power source circuit | IG POWER SOURCE CIRCUIT | |
| 5. A/C amplifier | TERMINALS OF ECU | |
| Airflow Control: No blower operation | 1. Blower motor circuit | BLOWER MOTOR CIRCUIT |
| 2. A/C amplifier | TERMINALS OF ECU | |
| Airflow Control: No blower control | 1. Blower motor circuit | BLOWER MOTOR CIRCUIT |
| 2. Room temperature sensor circuit | DTC B1411/11 ROOM TEMPERATURE SENSOR CIRCUIT | |
| 3. Ambient temperature sensor circuit | DTC B1412/12 AMBIENT TEMPERATURE SENSOR CIRCUIT | |
| 4. Driver side solar sensor circuit | DTC B1424/24 SOLAR SENSOR CIRCUIT (DRIVER SIDE) | |
| 5. Passenger side solar sensor circuit | DTC B1421/21 SOLAR SENSOR CIRCUIT (PASSENGER SIDE) | |
| 6. A/C amplifier | TERMINALS OF ECU | |
| Airflow Control: Insufficient airflow | 1. Blower motor circuit | BLOWER MOTOR CIRCUIT |
| 2. A/C amplifier | TERMINALS OF ECU | |
| Temperature Control: No cool air comes out | 1. Volume of refrigerant | - |
| 2. Refrigerant pressure | REFRIGERANT | |
| 3. Pressure sensor circuit | DTC B1423/23 PRESSURE SENSOR CIRCUIT | |
| 4. Blower motor circuit | BLOWER MOTOR CIRCUIT | |
| 5. Driver side air mix damper control servo motor circuit | DTC B1446/46 AIR MIX DAMPER CONTROL SERVO MOTOR CIRCUIT (DRIVER SIDE) | |
| 6. Passenger side air mix damper control servo motor circuit | DTC B1441/41 AIR MIX DAMPER CONTROL SERVO MOTOR CIRCUIT (PASSENGER SIDE) | |
| 7. Room temperature sensor circuit | DTC B1411/11 ROOM TEMPERATURE SENSOR CIRCUIT | |
| 8. Room humidity sensor circuit | DTC B1462/62 ROOM HUMIDITY SENSOR CIRCUIT | |
| 9. Ambient temperature sensor circuit | DTC B1412/12 AMBIENT TEMPERATURE SENSOR CIRCUIT | |
| 10. Evaporator temperature sensor circuit | DTC B1413/13 EVAPORATOR TEMPERATURE SENSOR CIRCUIT | |
| 11. Cool air bypass damper control servo motor circuit | DTC B1445/45 FRONT PASSENGER SEAT SIDE COOL AIR BYPASS DAMPER CONTROL SERVO MOTOR CIRCUIT | |
| 12. Air conditioning harness | DTC B1497/97 BUS IC COMMUNICATION MALFUNCTION | |
| 13. Compressor assembly | DTC B1471/71 A/C INVERTER HIGH VOLTAGE POWER RESOURCE SYSTEM MALFUNCTION | |
| 14. ECM | ECM | |
| 15. Hybrid vehicle control ECU | HYBRID VEHICLE CONTROL ECU | |
| 16. Multiplex communication circuit | DTC B1499/99 MULTIPLEX COMMUNICATION CIRCUIT | |
| 17. CAN communication line | PROBLEM SYMPTOMS TABLE | |
| 18. A/C amplifier | TERMINALS OF ECU | |
| Temperature Control: No warm air comes out | 1. Driver side air mix damper control servo motor circuit | DTC B1446/46 AIR MIX DAMPER CONTROL SERVO MOTOR CIRCUIT (DRIVER SIDE) |
| 2. Passenger side air mix damper control servo motor circuit | DTC B1441/41 AIR MIX DAMPER CONTROL SERVO MOTOR CIRCUIT (PASSENGER SIDE) | |
| 3. Heater water pump circuit | HEATER WATER PUMP CIRCUIT | |
| 4. Room temperature sensor circuit | DTC B1411/11 ROOM TEMPERATURE SENSOR CIRCUIT | |
| 5. Room humidity sensor circuit | DTC B1462/62 ROOM HUMIDITY SENSOR CIRCUIT | |
| 6. Ambient temperature sensor circuit | DTC B1412/12 AMBIENT TEMPERATURE SENSOR CIRCUIT | |
| 7. Evaporator temperature sensor circuit | DTC B1413/13 EVAPORATOR TEMPERATURE SENSOR CIRCUIT | |
| 8. Air conditioning harness | DTC B1497/97 BUS IC COMMUNICATION MALFUNCTION | |
| 9. Compressor assembly | DTC B1471/71 A/C INVERTER HIGH VOLTAGE POWER RESOURCE SYSTEM MALFUNCTION | |
| 10. Pressure sensor circuit | DTC B1423/23 PRESSURE SENSOR CIRCUIT | |
| 11. ECM | ECM | |
| 12. Multiplex communication circuit | DTC B1499/99 MULTIPLEX COMMUNICATION CIRCUIT | |
| 13. CAN communication line | PROBLEM SYMPTOMS TABLE | |
| 14. A/C amplifier | TERMINALS OF ECU | |
| Temperature Control: Output air is warmer or cooler than the set temperature or response is slow | 1. Volume of refrigerant | - |
| 2. Refrigerant pressure | REFRIGERANT | |
| 3. Driver side air mix damper control servo motor circuit | DTC B1446/46 AIR MIX DAMPER CONTROL SERVO MOTOR CIRCUIT (DRIVER SIDE) | |
| 4. Passenger side air mix damper control servo motor circuit | DTC B1441/41 AIR MIX DAMPER CONTROL SERVO MOTOR CIRCUIT (PASSENGER SIDE) | |
| 5. Room temperature sensor circuit | DTC B1411/11 ROOM TEMPERATURE SENSOR CIRCUIT | |
| 6. Room humidity sensor circuit | DTC B1462/62 ROOM HUMIDITY SENSOR CIRCUIT | |
| 7. Ambient temperature sensor circuit | DTC B1412/12 AMBIENT TEMPERATURE SENSOR CIRCUIT | |
| 8. Driver side solar sensor circuit | DTC B1424/24 SOLAR SENSOR CIRCUIT (DRIVER SIDE) | |
| 9. Passenger side solar sensor circuit | DTC B1421/21 SOLAR SENSOR CIRCUIT (PASSENGER SIDE) | |
| 10. Evaporator temperature sensor circuit | DTC B1413/13 EVAPORATOR TEMPERATURE SENSOR CIRCUIT | |
| 11. Cool air bypass damper control servo motor circuit | DTC B1445/45 FRONT PASSENGER SEAT SIDE COOL AIR BYPASS DAMPER CONTROL SERVO MOTOR CIRCUIT | |
| 12. Air conditioning harness | DTC B1497/97 BUS IC COMMUNICATION MALFUNCTION | |
| 13. ECM | ECM | |
| 14. Multiplex communication circuit | DTC B1499/99 MULTIPLEX COMMUNICATION CIRCUIT | |
| 15. CAN communication line | PROBLEM SYMPTOMS TABLE | |
| 16. A/C amplifier | TERMINALS OF ECU | |
| Temperature Control: No temperature control (only Max. cool or Max. warm) | 1. Driver side air mix damper control servo motor circuit | DTC B1446/46 AIR MIX DAMPER CONTROL SERVO MOTOR CIRCUIT (DRIVER SIDE) |
| 2. Passenger side air mix damper control servo motor circuit | DTC B1441/41 AIR MIX DAMPER CONTROL SERVO MOTOR CIRCUIT (PASSENGER SIDE) | |
| 3. Room temperature sensor circuit | DTC B1411/11 ROOM TEMPERATURE SENSOR CIRCUIT | |
| 4. Room humidity sensor circuit | DTC B1462/62 ROOM HUMIDITY SENSOR CIRCUIT | |
| 5. Cool air bypass damper control servo motor circuit | DTC B1445/45 FRONT PASSENGER SEAT SIDE COOL AIR BYPASS DAMPER CONTROL SERVO MOTOR CIRCUIT | |
| 6. Evaporator temperature sensor circuit | DTC B1413/13 EVAPORATOR TEMPERATURE SENSOR CIRCUIT | |
| 7. Driver side solar sensor circuit | DTC B1424/24 SOLAR SENSOR CIRCUIT (DRIVER SIDE) | |
| 8. Passenger side solar sensor circuit | DTC B1421/21 SOLAR SENSOR CIRCUIT (PASSENGER SIDE) | |
| 9. Multiplex communication circuit | DTC B1499/99 MULTIPLEX COMMUNICATION CIRCUIT | |
| 10. A/C amplifier | TERMINALS OF ECU | |
| No air inlet control | 1. Air inlet damper control servo motor circuit | DTC B1443/43 AIR OUTLET DAMPER CONTROL SERVO MOTOR CIRCUIT |
| 2. Air conditioning harness | DTC B1497/97 BUS IC COMMUNICATION MALFUNCTION | |
| No air outlet control | 1. Air outlet damper control servo motor circuit | DTC B1443/43 AIR OUTLET DAMPER CONTROL SERVO MOTOR CIRCUIT |
| 2. A/C amplifier | TERMINALS OF ECU | |
| Engine idle does not occur, or is continuous | 1. Multiplex communication circuit | DTC B1499/99 MULTIPLEX COMMUNICATION CIRCUIT |
| 2. A/C amplifier | TERMINALS OF ECU | |
| Unable to control A/C with the multi-display | 1. Multiplex communication circuit | DTC B1499/99 MULTIPLEX COMMUNICATION CIRCUIT |
| 2. Multi-display (w/ Navigation system) | MULTI-DISPLAY | |
| 3. Integration control and panel (w/o Navigation system) | - | |
| 4. A/C amplifier | TERMINALS OF ECU | |
| Diagnostic trouble codes are not recorded. Set mode cleared when power switch turned OFF. | 1. Back-up power source circuit | BACK-UP POWER SOURCE CIRCUIT |
| 2. A/C amplifier | TERMINALS OF ECU |