Problem Symptoms Table
WARNING: This page is about a different car, the 2008 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
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 CHART
| Symptom | Suspected Area | See |
|---|---|---|
| No functions of A/C system operate | 1. ECU-IG2 fuse | - |
| 2. Wire harness or connector | - | |
| 3. Air conditioning amplifier | TERMINALS OF ECU | |
| Airflow Control: Blower motor does not operate | 1. HTR, ECU-IG1 fuse | - |
| 2. Blower motor circuit | BLOWER MOTOR CIRCUIT | |
| 3. Blower motor | BLOWER MOTOR | |
| 4. Wire harness or connector | - | |
| Airflow Control: Blower motor does not change speed | 1. Blower resistor | BLOWER RESISTOR |
| 2. Blower motor | BLOWER MOTOR | |
| 3. Heater control (blower switch) | AIR CONDITIONING PANEL (FOR MANUAL AIR CONDITIONING SYSTEM) | |
| Temperature Control: No cool air comes out | 1. Refrigerant volume | - |
| 2. Refrigerant pressure | - | |
| 3. Air conditioning pressure sensor circuit | DTC B1423/23 PRESSURE SENSOR CIRCUIT | |
| 4. Heater control base (A/C switch) | AIR CONDITIONING PANEL (FOR MANUAL AIR CONDITIONING SYSTEM) | |
| 5. Compressor and pulley (for 2AZ-FE) | COMPRESSOR AND PULLEY (FOR 2AZ-FE) | |
| 6. Compressor and magnetic clutch (for 2GR-FE) | COMPRESSOR AND PULLEY (FOR 2GR-FE) | |
| 7. Compressor circuit | COMPRESSOR CIRCUIT | |
| 8. Expansion valve | - | |
| 9. Air conditioning amplifier | TERMINALS OF ECU | |
| 10. ECM (for 2AZ-FE) | SFI SYSTEM | |
| 11. ECM (for 2GR-FE) | SFI SYSTEM | |
| 12. CAN communication | CAN COMMUNICATION SYSTEM | |
| A/C compressor does not operate | 1. ECU-IG2 fuse | - |
| 2. Refrigerant pressure | - | |
| 3. Compressor and pulley (for 2AZ-FE) | COMPRESSOR AND PULLEY (FOR 2AZ-FE) | |
| 4. Compressor and magnetic clutch (for 2GR-FE) | COMPRESSOR AND PULLEY (FOR 2GR-FE) | |
| 5. Air conditioning pressure sensor circuit | DTC B1423/23 PRESSURE SENSOR CIRCUIT | |
| 6. Evaporator temperature sensor circuit | DTC B1413/13 EVAPORATOR TEMPERATURE SENSOR CIRCUIT | |
| 7. Air conditioning amplifier | TERMINALS OF ECU | |
| 8. ECM (for 2AZ-FE) | SFI SYSTEM | |
| 9. ECM (for 2GR-FE) | SFI SYSTEM | |
| 10. CAN communication | CAN COMMUNICATION SYSTEM | |
| Engine idle up does not occur, or is continuos | 1. Compressor circuit | COMPRESSOR CIRCUIT |
| 2. ECM (for 2AZ-FE) | SFI SYSTEM | |
| 3. ECM (for 2GR-FE) | SFI SYSTEM |