Problem Symptoms Table
HINT:
- Use the table below to help determine the cause of the problem symptoms. If multiple suspected areas are listed, 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 if necessary.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
AIR CONDITIONING SYSTEM
| Symptom | Suspected Area | Refer To |
|---|---|---|
| All functions of the A/C system do not operate. | IG power source circuit | Refer to IG Power Source Circuit |
| Back-up power source circuit | Refer to Back-up Power Source Circuit | |
| A/C amplifier | Refer to REMOVAL | |
| Air Flow Control: No blower operation | Blower motor circuit | Refer to Blower Motor Circuit |
| A/C amplifier | Refer to REMOVAL | |
| Air Flow Control: No blower control | Blower motor circuit | Refer to Blower Motor Circuit |
| A/C amplifier | Refer to REMOVAL | |
| Air Flow Control: Insufficient air flow | Blower motor circuit | Refer to Blower Motor Circuit |
| A/C amplifier | Refer to REMOVAL | |
| Temperature Control: No cool air comes out. | Refrigerant volume | - |
| Refrigerant pressure | Refer to ON-VEHICLE INSPECTION | |
| Pressure sensor circuit | Refer to DTC B1423: Pressure Sensor Circuit | |
| Air flow circuit (for 2ZR-FE) | Refer to DTC B1479: Flow Sensor Circuit | |
| Compressor solenoid circuit | Refer to DTC B1451: Compressor Solenoid Circuit | |
| Evaporator temperature sensor circuit | Refer to DTC B1413: Evaporator Temperature Sensor Circuit | |
| Ambient temperature sensor circuit | Refer to DTC B1412: Ambient Temperature Sensor Circuit | |
| Heater control switch circuit | Refer to Heater Control Switch Circuit | |
| Air mix damper control cable | Refer to DISASSEMBLY - Step 3 | |
| Expansion valve | Refer to DISASSEMBLY - Step 9 | |
| A/C amplifier | Refer to REMOVAL | |
| Temperature Control: No warm air comes out. | Evaporator temperature sensor circuit | Refer to DTC B1413: Evaporator Temperature Sensor Circuit |
| Ambient temperature sensor circuit | Refer to DTC B1412: Ambient Temperature Sensor Circuit | |
| Generator signal circuit*1 | Refer to Generator Signal Circuit | |
| Headlight signal circuit*1 | Refer to Headlight Signal Circuit | |
| PTC heater circuit*1 | Refer to PTC Heater Circuit | |
| Engine coolant temperature sensor circuit (for 2AZ-FE) | Refer to DTC P0115: Engine Coolant Temperature Circuit Malfunction; DTC P0117: Engine Coolant Temperature Circuit Low Input; DTC P0118: Engine Coolant Temperature Circuit High Input | |
| Engine coolant temperature sensor circuit (for 2ZR-FE) | Refer to DTC P0115: Engine Coolant Temperature Circuit Malfunction; DTC P0117: Engine Coolant Temperature Circuit Low Input; DTC P0118: Engine Coolant Temperature Circuit High Input | |
| CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Air mix damper control cable | Refer to DISASSEMBLY - Step 3 | |
| A/C amplifier | Refer to REMOVAL | |
| ECM (for 2AZ-FE) | Refer to REMOVAL | |
| ECM (for 2ZR-FE) | Refer to REMOVAL | |
| Temperature Control: Output air is warmer or cooler than the set temperature or response is slow. | Refrigerant volume | - |
| Refrigerant pressure | Refer to ON-VEHICLE INSPECTION | |
| Ambient temperature sensor circuit | Refer to DTC B1412: Ambient Temperature Sensor Circuit | |
| Generator signal circuit*1 | Refer to Generator Signal Circuit | |
| Headlight signal circuit*1 | Refer to Headlight Signal Circuit | |
| PTC heater circuit*1 | Refer to PTC Heater Circuit | |
| Engine coolant temperature sensor circuit (for 2AZ-FE) | Refer to DTC P0115: Engine Coolant Temperature Circuit Malfunction; DTC P0117: Engine Coolant Temperature Circuit Low Input; DTC P0118: Engine Coolant Temperature Circuit High Input | |
| Engine coolant temperature sensor circuit (for 2ZR-FE) | Refer to DTC P0115: Engine Coolant Temperature Circuit Malfunction; DTC P0117: Engine Coolant Temperature Circuit Low Input; DTC P0118: Engine Coolant Temperature Circuit High Input | |
| CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Air mix damper control cable | Refer to DISASSEMBLY - Step 3 | |
| Radiator unit sub-assembly | Refer to DISASSEMBLY - Step 8 | |
| Expansion valve | Refer to DISASSEMBLY - Step 9 | |
| A/C amplifier | Refer to REMOVAL | |
| ECM (for 2AZ-FE) | Refer to REMOVAL | |
| ECM (for 2ZR-FE) | Refer to REMOVAL | |
| Temperature Control: No temperature control (only Max. cool or Max. hot) | Ambient temperature sensor circuit | Refer to DTC B1412: Ambient Temperature Sensor Circuit |
| Evaporator temperature sensor circuit | Refer to DTC B1413: Evaporator Temperature Sensor Circuit | |
| Heater control switch circuit | Refer to Heater Control Switch Circuit | |
| Generator signal circuit*1 | Refer to Generator Signal Circuit | |
| Headlight signal circuit*1 | Refer to Headlight Signal Circuit | |
| PTC heater circuit*1 | Refer to PTC Heater Circuit | |
| Engine coolant temperature sensor circuit (for 2AZ-FE) | Refer to DTC P0115: Engine Coolant Temperature Circuit Malfunction; DTC P0117: Engine Coolant Temperature Circuit Low Input; DTC P0118: Engine Coolant Temperature Circuit High Input | |
| Engine coolant temperature sensor circuit (for 2ZR-FE) | Refer to DTC P0115: Engine Coolant Temperature Circuit Malfunction; DTC P0117: Engine Coolant Temperature Circuit Low Input; DTC P0118: Engine Coolant Temperature Circuit High Input | |
| CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Air mix damper control cable | Refer to DISASSEMBLY - Step 3 | |
| A/C amplifier | Refer to REMOVAL | |
| ECM (for 2AZ-FE) | Refer to REMOVAL | |
| ECM (for 2ZR-FE) | Refer to REMOVAL | |
| No air inlet control | Recirculation damper servo motor circuit | Refer to Recirculation Damper Servo Motor Circuit |
| A/C amplifier | Refer to REMOVAL | |
| No air flow mode control | No. 2 heater control cable | Refer to DISASSEMBLY - Step 2 |
| Engine idle up does not occur, or is continuous. | Compressor solenoid circuit | Refer to DTC B1451: Compressor Solenoid Circuit |
| A/C amplifier | Refer to REMOVAL | |
| ECM (for 2AZ-FE) | Refer to REMOVAL | |
| ECM (for 2ZR-FE) | Refer to REMOVAL | |
| CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| A/C indicator blinks. | Compressor solenoid circuit | Refer to DTC B1451: Compressor Solenoid Circuit |
| A/C amplifier | Refer to REMOVAL | |
| Diagnostic trouble codes are not recorded. Set mode is cleared when ignition switch is turned off. | Back-up power source circuit | Refer to Back-up Power Source Circuit |
| A/C amplifier | Refer to REMOVAL |
- *1: w/ PTC Heater Assembly