Problem Symptoms Table
WARNING: This page is about a different car, the 2012 Toyota Corolla. 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 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 as necessary.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
AIR CONDITIONING SYSTEM (FOR AUTOMATIC AIR CONDITIONING SYSTEM)
| Symptom | Suspected Area | See |
|---|---|---|
| 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 | |
| Heater control panel power source circuit | Refer to Heater Control Panel Power Source Circuit | |
| LIN communication circuit | Refer to LIN Communication Circuit | |
| A/C control assembly | Refer to REMOVAL | |
| A/C amplifier | Refer to REMOVAL | |
| Air Flow Control: No blower operation | Blower motor circuit | Refer to Blower Motor Circuit |
| Heater control panel power source circuit | Refer to Heater Control Panel Power Source Circuit | |
| LIN communication circuit | Refer to LIN Communication Circuit | |
| A/C control assembly | Refer to REMOVAL | |
| A/C amplifier | Refer to REMOVAL | |
| Air Flow Control: No blower control | Blower motor circuit | Refer to Blower Motor Circuit |
| Heater control panel power source circuit | Refer to Heater Control Panel Power Source Circuit | |
| LIN communication circuit | Refer to LIN Communication Circuit | |
| A/C control assembly | Refer to REMOVAL | |
| 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 B1423/23: Pressure Sensor Circuit | |
| Air flow circuit (for 2ZR-FE) | Refer to DTC B1479/79: Flow Sensor Circuit | |
| Compressor solenoid circuit | Refer to DTC B1451/51: Compressor Solenoid Circuit | |
| Air mix control servo motor circuit | Refer to DTC B1441/41: Air Mix Damper Control Servo Motor Circuit (Passenger Side) | |
| Evaporator temperature sensor circuit | Refer to DTC B1413/13: Evaporator Temperature Sensor Circuit | |
| Room temperature sensor circuit | Refer to DTC B1411/11: Room Temperature Sensor Circuit | |
| Ambient temperature sensor circuit | Refer to DTC B1412/12: Ambient Temperature Sensor Circuit | |
| Heater control panel power source circuit | Refer to Heater Control Panel Power Source Circuit | |
| LIN communication circuit | Refer to LIN Communication Circuit | |
| Expansion valve | Refer to DISASSEMBLY | |
| A/C control assembly | Refer to REMOVAL | |
| A/C amplifier | Refer to REMOVAL | |
| ECM (for 2AZ-FE) | Refer to REMOVAL | |
| ECM (for 2ZR-FE) | Refer to REMOVAL | |
| Temperature Control: No warm air comes out. | Air mix control servo motor circuit | Refer to DTC B1441/41: Air Mix Damper Control Servo Motor Circuit (Passenger Side) |
| Evaporator temperature sensor circuit | Refer to DTC B1413/13: Evaporator Temperature Sensor Circuit | |
| Room temperature sensor circuit | Refer to DTC B1411/11: Room Temperature Sensor Circuit | |
| Ambient temperature sensor circuit | Refer to DTC B1412/12: 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 | |
| CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| 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 | |
| A/C amplifier | 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 | |
| Solar sensor circuit | Refer to DTC B1421/21: Solar Sensor Circuit (Passenger Side) | |
| Room temperature sensor circuit | Refer to DTC B1411/11: Room Temperature Sensor Circuit | |
| Ambient temperature sensor circuit | Refer to DTC B1412/12: 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 | |
| Air mix control servo motor circuit | Refer to DTC B1441/41: Air Mix Damper Control Servo Motor Circuit (Passenger Side) | |
| Radiator unit sub-assembly | Refer to DISASSEMBLY | |
| Expansion valve | Refer to DISASSEMBLY | |
| CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| 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 | |
| A/C amplifier | Refer to REMOVAL | |
| Temperature Control: No temperature control (only Max. cool or Max. warm) | Air mix control servo motor circuit | Refer to DTC B1441/41: Air Mix Damper Control Servo Motor Circuit (Passenger Side) |
| Room temperature sensor circuit | Refer to DTC B1411/11: Room Temperature Sensor Circuit | |
| Ambient temperature sensor circuit | Refer to DTC B1412/12: Ambient Temperature Sensor Circuit | |
| Evaporator temperature sensor circuit | Refer to DTC B1413/13: Evaporator Temperature Sensor Circuit | |
| Solar sensor circuit | Refer to DTC B1421/21: Solar Sensor Circuit (Passenger Side) | |
| 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 | |
| Compressor solenoid circuit | Refer to DTC B1451/51: Compressor Solenoid 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 | |
| A/C control assembly | Refer to REMOVAL | |
| ECM (for 2AZ-FE) | Refer to REMOVAL | |
| ECM (for 2ZR-FE) | Refer to REMOVAL | |
| A/C amplifier | Refer to REMOVAL | |
| No air inlet control | Air inlet control servo motor circuit | Refer to DTC B1442/42: Air Inlet Damper Control Servo Motor Circuit |
| A/C amplifier | Refer to REMOVAL | |
| No air flow mode control | Air outlet control servo motor circuit | Refer to DTC B1443/43: Air Outlet Damper Control Servo Motor Circuit |
| A/C amplifier | Refer to REMOVAL | |
| Engine idle up does not occur, or is continuous. | Compressor solenoid circuit | Refer to DTC B1451/51: Compressor Solenoid Circuit |
| Heater control panel power source circuit | Refer to Heater Control Panel Power Source Circuit | |
| LIN communication circuit | Refer to LIN Communication Circuit | |
| A/C control assembly | Refer to REMOVAL | |
| A/C amplifier | Refer to REMOVAL | |
| ECM (for 2AZ-FE) | Refer to REMOVAL | |
| ECM (for 2ZR-FE) | Refer to REMOVAL | |
| A/C indicator blinks. | Compressor solenoid circuit | Refer to DTC B1451/51: Compressor Solenoid Circuit |
| A/C amplifier | Refer to REMOVAL | |
| Diagnostic trouble codes are not recorded. Set mode is cleared when ignition switch is off. | Back-up power source circuit | Refer to Back-up Power Source Circuit |
| A/C amplifier | Refer to REMOVAL |
*1: w/ PTC Heater Assembly