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 shortage check using the GTS | |
| Refrigerant volume | - | |
| Refrigerant pressure | ||
| Cooler expansion valve | ||
| Compressor with motor assembly | ||
| Air conditioning amplifier assembly | ||
| Temperature control: No cool air comes out | Refrigerant shortage check using the GTS | |
| Refrigerant volume | - | |
| Refrigerant pressure | ||
| Air conditioner pressure sensor circuit | ||
| LIN communication circuit | ||
| Air mix damper control servo motor circuit (for driver upper layer side) | ||
| Air mix damper control servo motor circuit (for front passenger upper layer side) | ||
| Air mix damper control servo motor circuit (for driver lower layer side) | ||
| Air mix damper control servo motor circuit (for front passenger lower layer side) | ||
| Evaporator temperature sensor circuit | ||
| Room temperature sensor circuit | ||
| Ambient temperature sensor circuit | ||
| Cooler expansion valve | ||
| No. 4 engine wire | ||
| No. 2 air conditioning radiator damper servo sub-assembly (Driver side upper air mix) | ||
| No. 2 air conditioning radiator damper servo sub-assembly (Front passenger side upper air mix) | ||
| No. 5 air conditioning radiator damper servo sub-assembly (Driver side lower air mix)*3 | ||
| No. 5 air conditioning radiator damper servo sub-assembly (Front passenger side lower air mix)*4 | ||
| No. 4 air conditioning radiator damper servo sub-assembly (Front passenger side lower air mix)*3 | ||
| No. 4 air conditioning radiator damper servo sub-assembly (Driver side lower air mix)*4 | ||
| Air conditioning harness assembly | ||
| Compressor with motor assembly | ||
| Air conditioning amplifier assembly | ||
| Power management control ECU | ||
| ECM | ||
| Temperature control: No warm air comes out | LIN communication circuit | |
| Air mix damper control servo motor circuit (for driver upper layer side) | ||
| Air mix damper control servo motor circuit (for front passenger upper layer side) | ||
| Air mix damper control servo motor circuit (for driver lower layer side) | ||
| Air mix damper control servo motor circuit (for front passenger lower layer side) | ||
| Evaporator temperature sensor circuit | ||
| Room temperature sensor circuit | ||
| Ambient temperature sensor circuit | ||
| Heater water pump circuit | ||
| PTC heater circuit*1 | ||
| No. 2 air conditioning radiator damper servo sub-assembly (Driver side upper air mix) | ||
| No. 2 air conditioning radiator damper servo sub-assembly (Front passenger side upper air mix) | ||
| No. 5 air conditioning radiator damper servo sub-assembly (Driver side lower air mix)*3 | ||
| No. 5 air conditioning radiator damper servo sub-assembly (Front passenger side lower air mix)*4 | ||
| No. 4 air conditioning radiator damper servo sub-assembly (Front passenger side lower air mix)*3 | ||
| No. 4 air conditioning radiator damper servo sub-assembly (Driver side lower air mix)*4 | ||
| Air conditioning harness assembly | ||
| Air conditioning amplifier assembly | ||
| Power management control ECU | ||
| ECM | ||
| Temperature control: Output air is warmer or cooler than the set temperature or response is slow | Refrigerant shortage check using the GTS | |
| Refrigerant volume | - | |
| Refrigerant pressure | ||
| Automatic light control sensor | ||
| Room temperature sensor circuit | ||
| Ambient temperature sensor circuit | ||
| LIN communication circuit | ||
| Air mix damper control servo motor circuit (for driver upper layer side) | ||
| Air mix damper control servo motor circuit (for front passenger upper layer side) | ||
| Air mix damper control servo motor circuit (for driver lower layer side) | ||
| Air mix damper control servo motor circuit (for front passenger lower layer side) | ||
| Air inlet damper control servo motor circuit | ||
| PTC heater circuit*1 | ||
| Heater radiator unit sub-assembly | ||
| Cooler expansion valve | ||
| No. 4 engine wire | ||
| No. 2 air conditioning radiator damper servo sub-assembly (Driver side upper air mix) | ||
| No. 2 air conditioning radiator damper servo sub-assembly (Front passenger side upper air mix) | ||
| No. 5 air conditioning radiator damper servo sub-assembly (Driver side lower air mix)*3 | ||
| No. 5 air conditioning radiator damper servo sub-assembly (Front passenger side lower air mix)*4 | ||
| No. 4 air conditioning radiator damper servo sub-assembly (Front passenger side lower air mix)*3 | ||
| No. 4 air conditioning radiator damper servo sub-assembly (Driver side lower air mix)*4 | ||
| No. 1 blower damper servo sub-assembly | ||
| Air conditioning harness assembly | ||
| Air conditioning amplifier assembly | ||
| Power management control ECU | ||
| ECM | ||
| Temperature control: No temperature control (only MAX COLD or MAX HOT) | LIN communication circuit | |
| Air mix damper control servo motor circuit (for driver upper layer side) | ||
| Air mix damper control servo motor circuit (for front passenger upper layer side) | ||
| Air mix damper control servo motor circuit (for driver lower layer side) | ||
| Air mix damper control servo motor circuit (for front passenger lower layer side) | ||
| Room temperature sensor circuit | ||
| Ambient temperature sensor circuit | ||
| Evaporator temperature sensor circuit | ||
| Automatic light control sensor | ||
| No. 2 air conditioning radiator damper servo sub-assembly (Driver side upper air mix) | ||
| No. 2 air conditioning radiator damper servo sub-assembly (Front passenger side upper air mix) | ||
| No. 5 air conditioning radiator damper servo sub-assembly (Driver side lower air mix)*3 | ||
| No. 5 air conditioning radiator damper servo sub-assembly (Front passenger side lower air mix)*4 | ||
| No. 4 air conditioning radiator damper servo sub-assembly (Front passenger side lower air mix)*3 | ||
| No. 4 air conditioning radiator damper servo sub-assembly (Driver side lower air mix)*4 | ||
| Air conditioning harness assembly | ||
| Air conditioning amplifier assembly | ||
| Temperature control: Output air temperature is different between left and right registers (the set temperature is the same for both) | Refrigerant shortage check using the GTS | |
| Refrigerant volume | - | |
| Refrigerant pressure | ||
| Air mix damper control servo motor circuit (for driver upper layer side) | ||
| Air mix damper control servo motor circuit (for front passenger upper layer side) | ||
| Air mix damper control servo motor circuit (for driver lower layer side) | ||
| Air mix damper control servo motor circuit (for front passenger lower layer side) | ||
| Automatic light control sensor | ||
| No. 2 air conditioning radiator damper servo sub-assembly (Driver side upper air mix) | ||
| No. 2 air conditioning radiator damper servo sub-assembly (Front passenger side upper air mix) | ||
| No. 5 air conditioning radiator damper servo sub-assembly (Driver side lower air mix)*3 | ||
| No. 5 air conditioning radiator damper servo sub-assembly (Front passenger side lower air mix)*4 | ||
| No. 4 air conditioning radiator damper servo sub-assembly (Front passenger side lower air mix)*3 | ||
| No. 4 air conditioning radiator damper servo sub-assembly (Driver side lower air mix)*4 | ||
| Air conditioning harness assembly | ||
| Air conditioning amplifier assembly | ||
| No air inlet control | LIN communication circuit | |
| Air inlet damper control servo motor circuit | ||
| No. 1 blower damper servo sub-assembly | ||
| Air conditioning harness assembly | ||
| Air conditioning amplifier assembly | ||
| No air flow mode control | LIN communication circuit | |
| Air outlet damper control servo motor circuit | ||
| Driver side air outlet damper foot/def control servo motor circuit | ||
| Rear air outlet damper control servo motor circuit*2 | ||
| No. 1 air conditioning radiator damper servo sub-assembly | ||
| No. 3 air conditioning radiator damper servo sub-assembly | ||
| No. 6 air conditioning radiator damper servo sub-assembly*2 | ||
| Air conditioning harness assembly | ||
| Air conditioning amplifier assembly | ||
| Quick heater assembly does not operate*1 | PTC heater circuit | |
| Air conditioning amplifier assembly | ||
| Combination switch assembly (ECO mode switch) does not operate normally | ECO switch circuit | |
| Air conditioning amplifier assembly | ||
| Diagnostic trouble codes (DTCs) are not recorded. Set mode is cleared when the power switch is turned off. | Back-up power source circuit | |
| Air conditioning amplifier assembly |
*1: w/ PTC Heater
*2: for Dual Type
*3: for LHD
*4: for RHD