Tech Tips
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.
| Symptom | Suspected Area | Link |
|---|---|---|
| All functions of the air conditioning system do not operate | IG power source circuit | |
| Back-up power source circuit | ||
| LIN communication circuit | ||
| Air conditioning amplifier assembly | ||
| Air flow control: No blower operation | Blower motor circuit | |
| LIN communication circuit | ||
| Air conditioning amplifier assembly | ||
| Air flow control: No blower control | Blower motor circuit | |
| LIN communication circuit | ||
| Air conditioning amplifier assembly | ||
| Air flow control: Insufficient air flow | Blower motor circuit | |
| Air conditioning amplifier assembly | ||
| Temperature control: cooling effectiveness is poor | Refrigerant gas volume check using the GTS | |
| Refrigerant volume | ||
| Refrigerant pressure | ||
| Cooler expansion valve | ||
| Compressor assembly with pulley (for 2AD-FHV, 2AD-FTV) | ||
| Compressor assembly with pulley (for 3ZR-FE, 3ZR-FAE) | ||
| Compressor assembly with pulley (for 2WW) | ||
| Compressor assembly with pulley (for 2AR-FE) (w/ Magnet Clutch) | ||
| Cooler compressor assembly (for 2AR-FE) (w/ Magnet Clutch) | ||
| Air conditioning amplifier assembly | ||
| Temperature control: No cool air comes out | Refrigerant gas volume check using the GTS | |
| Refrigerant volume (for HFC-134a (R134a)) | ||
| Refrigerant volume (for HFO-1234yf (R1234yf)) | ||
| Refrigerant pressure (for HFC-134a (R134a)) | ||
| Refrigerant pressure (for HFO-1234yf (R1234yf)) | ||
| Air conditioning pressure sensor circuit | ||
| Air conditioning compressor magnetic clutch circuit (w/ Magnet Clutch) | ||
| Compressor lock sensor circuit (w/ Magnet Clutch) | ||
| Compressor solenoid circuit | ||
| Air mix damper control servo motor circuit (for driver side) | ||
| Air mix damper control servo motor circuit (for front passenger side) | ||
| Evaporator temperature sensor circuit | ||
| Room temperature sensor circuit | ||
| Ambient temperature sensor circuit | ||
| LIN communication circuit | ||
| Cooler expansion valve | ||
| No. 2 air conditioning radiator damper servo sub-assembly (driver side air mix) | ||
| No. 3 air conditioning radiator damper servo sub-assembly (front passenger side air mix) | ||
| Air conditioning harness assembly | ||
| Air conditioning amplifier assembly | ||
| ECM (for 2AD-FHV) | ||
| ECM (for 2AD-FTV) | ||
| ECM (for 2AR-FE) | ||
| ECM (for 2WW) | ||
| ECM (for 3ZR-FE) | ||
| ECM (for 3ZR-FAE) | ||
| Temperature control: No warm air comes out | Air mix damper control servo motor circuit (for driver side) | |
| Air mix damper control servo motor circuit (for front passenger side) | ||
| Evaporator temperature sensor circuit | ||
| Room temperature sensor circuit | ||
| Ambient temperature sensor circuit | ||
| LIN communication circuit | ||
| No. 2 air conditioning radiator damper servo sub-assembly (driver side air mix) | ||
| No. 3 air conditioning radiator damper servo sub-assembly (front passenger side air mix) | ||
| Air conditioning harness assembly | ||
| Air conditioning amplifier assembly | ||
| ECM (for 2AD-FHV) | ||
| ECM (for 2AR-FE) | ||
| ECM (for 2AD-FTV) | ||
| ECM (for 2WW) | ||
| ECM (for 3ZR-FE) | ||
| ECM (for 3ZR-FAE) | ||
| Temperature control: Output air is warmer or cooler than the set temperature or response is slow | Refrigerant gas volume check using the GTS | |
| Refrigerant volume (for HFC-134a (R134a)) | ||
| Refrigerant volume (for HFO-1234yf (R1234yf)) | ||
| Refrigerant pressure (for HFC-134a (R134a)) | ||
| Refrigerant pressure (for HFO-1234yf (R1234yf)) | ||
| Air conditioning compressor magnetic clutch circuit (w/ Magnet Clutch) | ||
| Compressor lock sensor circuit (w/ Magnet Clutch) | ||
| Compressor solenoid circuit | ||
| Solar sensor circuit (for driver side) | ||
| Solar sensor circuit (for front passenger side) | ||
| Room temperature sensor circuit | ||
| Ambient temperature sensor circuit | ||
| Air mix damper control servo motor circuit (for driver side) | ||
| Air mix damper control servo motor circuit (for front passenger side) | ||
| Air inlet damper control servo motor circuit | ||
| LIN communication circuit | ||
| Radiator unit sub-assembly | ||
| Cooler expansion valve | ||
| No. 2 air conditioning radiator damper servo sub-assembly (driver side air mix) | ||
| No. 3 air conditioning radiator damper servo sub-assembly (front passenger side air mix) | ||
| No. 1 blower damper servo sub-assembly (air inlet) | ||
| Air conditioning harness assembly | ||
| Air conditioning amplifier assembly | ||
| ECM (for 2AD-FHV) | ||
| ECM (for 2AR-FE) | ||
| ECM (for 2AD-FTV) | ||
| ECM (for 2WW) | ||
| ECM (for 3ZR-FE) | ||
| ECM (for 3ZR-FAE) | ||
| Temperature control: No temperature control (only Max. cool or Max. hot) | Air mix damper control servo motor circuit (for driver side) | |
| Air mix damper control servo motor circuit (for front Passenger side) | ||
| Room temperature sensor circuit | ||
| Ambient temperature sensor circuit | ||
| Evaporator temperature sensor circuit | ||
| Solar sensor circuit (for driver side) | ||
| Solar sensor circuit (for front passenger side) | ||
| LIN communication circuit | ||
| No. 2 air conditioning radiator damper servo sub-assembly (driver side air mix) | ||
| No. 3 air conditioning radiator damper servo sub-assembly (front passenger side air mix) | ||
| Air conditioning harness assembly | ||
| Air conditioning amplifier assembly | ||
| No air inlet control | Air inlet damper control servo motor circuit | |
| LIN communication circuit | ||
| No. 1 blower damper servo sub-assembly (air inlet) | ||
| Air conditioning harness assembly | ||
| Air conditioning amplifier assembly | ||
| No air flow mode control | Air outlet damper control servo motor circuit | |
| LIN communication circuit | ||
| No. 1 air conditioning radiator damper servo sub-assembly (mode) | ||
| Air conditioning harness assembly | ||
| Air conditioning amplifier assembly | ||
| Diagnostic trouble codes (DTCs) are not recorded. Set mode is cleared when ignition switch is off. | Back-up power source circuit | |
| Air conditioning amplifier assembly |