AIR CONDITIONING SYSTEM PROBLEM SYMPTOMS TABLE
Tech Tips
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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.
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Inspect the fuses and relays related to this system before inspecting the suspected areas below.
| Symptom | Suspected Area | See page |
|---|---|---|
| All functions of air conditioning system do not operate | Harness or connector | - |
| IG power source circuit | ||
| Back-up power source circuit | ||
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Audio and visual system | ||
| Multi-display assembly (w/ Navigation System) | ||
| Multi-display assembly (w/o Navigation System) | ||
| Multi-media module receiver assembly | ||
| Air conditioning amplifier assembly | ||
| Air Flow Control: No blower operation | Harness or connector | - |
| Blower motor circuit | ||
| Air conditioning amplifier assembly | ||
| Air Flow Control: Insufficient air flow | Multi-media module receiver assembly | |
| Air conditioning amplifier assembly | ||
| Switch operation of multi-display assembly is not accepted | Harness or connector | - |
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Audio and visual system | ||
| Multi-display assembly (w/ Navigation System) | ||
| Multi-display assembly (w/o Navigation System) | ||
| Multi-media module receiver assembly | ||
| Air conditioning amplifier assembly | ||
| Temperature Control: No cool air comes out | Volume of refrigerant | |
| Refrigerant pressure | ||
| Compressor lock sensor circuit | ||
| Air conditioning compressor magnet clutch circuit | ||
| Cooler compressor assembly | ||
| Pressure sensor circuit | ||
| Front air mix damper servo motor (for driver side) circuit | ||
| Front air mix damper servo motor (for driver side rear air flow) circuit | ||
| Front air mix damper servo motor (for front passenger side) circuit | ||
| Front air mix damper servo motor (for front passenger side rear air flow) circuit | ||
| Room temperature sensor circuit | ||
| Rear room temperature sensor circuit (for driver side) | ||
| Rear room temperature sensor circuit (for front passenger side) | ||
| Solar sensor circuit (for driver side) | ||
| Solar sensor circuit (for front passenger side) | ||
| Ambient temperature sensor circuit | ||
| Evaporator temperature sensor circuit | ||
| Front air mix damper servo motor (for driver side) (for LHD) | ||
| Front air mix damper servo motor (for driver side) (for RHD) | ||
| Front air mix damper servo motor (for driver side rear air flow) (for LHD) | ||
| Front air mix damper servo motor (for driver side rear air flow) (for RHD) | ||
| Front air mix damper servo motor (for front passenger side) (for LHD) | ||
| Front air mix damper servo motor (for front passenger side) (for RHD) | ||
| Front air mix damper servo motor (for front passenger side rear air flow) (for LHD) | ||
| Front air mix damper servo motor (for front passenger side rear air flow) (for RHD) | ||
| Air conditioning harness assembly (for LHD) | ||
| Air conditioning harness assembly (for RHD) | ||
| Air conditioning amplifier assembly | ||
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Temperature Control: No warm air comes out | Front air mix damper servo motor (for driver side) circuit | |
| Front air mix damper servo motor (for driver side rear air flow) circuit | ||
| Front air mix damper servo motor (for front passenger side) circuit | ||
| Front air mix damper servo motor (for front passenger side rear air flow) circuit | ||
| Room temperature sensor circuit | ||
| Rear room temperature sensor circuit (for driver side) | ||
| Rear room temperature sensor circuit (for front passenger side) | ||
| Solar sensor circuit (for driver side) | ||
| Solar sensor circuit (for front passenger side) | ||
| Ambient temperature sensor circuit | ||
| Front air mix damper servo motor (for driver side) (for LHD) | ||
| Front air mix damper servo motor (for driver side) (for RHD) | ||
| Front air mix damper servo motor (for driver side rear air flow) (for LHD) | ||
| Front air mix damper servo motor (for driver side rear air flow) (for RHD) | ||
| Front air mix damper servo motor (for front passenger side) (for LHD) | ||
| Front air mix damper servo motor (for front passenger side) (for RHD) | ||
| Front air mix damper servo motor (for front passenger side rear air flow) (for LHD) | ||
| Front air mix damper servo motor (for front passenger side rear air flow) (for RHD) | ||
| Air conditioning harness assembly (for LHD) | ||
| Air conditioning harness assembly (for RHD) | ||
| PTC heater circuit (w/ PTC Heater) | ||
| Air conditioning amplifier assembly | ||
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Temperature Control: Output air is warmer or cooler than the set temperature or response is slow | Volume of refrigerant | |
| Refrigerant pressure | ||
| Front air mix damper servo motor (for driver side) circuit | ||
| Front air mix damper servo motor (for driver side rear air flow) circuit | ||
| Front air mix damper servo motor (for front passenger side) circuit | ||
| Front air mix damper servo motor (for front passenger side rear air flow) circuit | ||
| REC/FRS damper servo motor circuit | ||
| Cool air bypass damper servo motor circuit | ||
| Room temperature sensor circuit | ||
| Rear room temperature sensor circuit (for driver side) | ||
| Rear room temperature sensor circuit (for front passenger side) | ||
| Solar sensor circuit (for driver side) | ||
| Solar sensor circuit (for front passenger side) | ||
| Ambient temperature sensor circuit | ||
| Cooler compressor assembly | ||
| Heater radiator | - | |
| Front air mix damper servo motor (for driver side) (for LHD) | ||
| Front air mix damper servo motor (for driver side) (for RHD) | ||
| Front air mix damper servo motor (for driver side rear air flow) (for LHD) | ||
| Front air mix damper servo motor (for driver side rear air flow) (for RHD) | ||
| Front air mix damper servo motor (for front passenger side) (for LHD) | ||
| Front air mix damper servo motor (for front passenger side) (for RHD) | ||
| Front air mix damper servo motor (for front passenger side rear air flow) (for LHD) | ||
| Front air mix damper servo motor (for front passenger side rear air flow) (for RHD) | ||
| REC/FRS damper servo motor (for LHD) | ||
| REC/FRS damper servo motor (for RHD) | ||
| Cool air bypass damper servo motor (for LHD) | ||
| Cool air bypass damper servo motor (for RHD) | ||
| Air conditioning harness assembly (for LHD) | ||
| Air conditioning harness assembly (for RHD) | ||
| Air conditioning amplifier assembly | ||
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Temperature Control: No temperature control (only max cool or max hot) | Room temperature sensor circuit | |
| Rear room temperature sensor circuit (for driver side) | ||
| Rear room temperature sensor circuit (for front passenger side) | ||
| Ambient temperature sensor circuit | ||
| Cool air bypass damper servo motor circuit | ||
| Front air mix damper servo motor (for driver side) circuit | ||
| Front air mix damper servo motor (for driver side rear air flow) circuit | ||
| Front air mix damper servo motor (for front passenger side) circuit | ||
| Front air mix damper servo motor (for front passenger side rear air flow) circuit | ||
| Multi-display assembly (w/ Navigation System) | ||
| Multi-display assembly (w/o Navigation System) | ||
| Multi-media module receiver assembly | ||
| Cool air bypass damper servo motor (for LHD) | ||
| Cool air bypass damper servo motor (for RHD) | ||
| Front air mix damper servo motor (for driver side) (for LHD) | ||
| Front air mix damper servo motor (for driver side) (for RHD) | ||
| Front air mix damper servo motor (for driver side rear air flow) (for LHD) | ||
| Front air mix damper servo motor (for driver side rear air flow) (for RHD) | ||
| Front air mix damper servo motor (for front passenger side) (for LHD) | ||
| Front air mix damper servo motor (for front passenger side) (for RHD) | ||
| Front air mix damper servo motor (for front passenger side rear air flow) (for LHD) | ||
| Front air mix damper servo motor (for front passenger side rear air flow) (for RHD) | ||
| Air conditioning harness assembly (for LHD) | ||
| Air conditioning harness assembly (for RHD) | ||
| Air conditioning amplifier assembly | ||
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| PTC heater does not operate (w/ PTC Heater) | PTC heater circuit | |
| Air conditioning amplifier assembly | ||
| ECM (for 1UR-FE) | ||
| ECM (for 3UR-FE) | ||
| No airflow mode control | Air outlet damper servo motor (for driver side) circuit | |
| Air outlet damper servo motor (for rear seat mode) circuit | ||
| Air outlet damper servo motor (for DEF mode) circuit (for RHD) | ||
| Air outlet damper servo motor (for front passenger side mode) circuit | ||
| Air outlet damper servo motor (for driver side) (for LHD) | ||
| Air outlet damper servo motor (for driver side) (for RHD) | ||
| Air outlet damper servo motor (for rear seat mode) (for LHD) | ||
| Air outlet damper servo motor (for rear seat mode) (for RHD) | ||
| Air outlet damper servo motor (for DEF mode) (for RHD) | ||
| Air outlet damper servo motor (for front passenger side mode) (for LHD) | ||
| Air outlet damper servo motor (for front passenger side mode) (for RHD) | ||
| Air conditioning harness assembly (for LHD) | ||
| Air conditioning harness assembly (for RHD) | ||
| Air conditioning amplifier assembly | ||
| Blinking of air conditioning switch indicator | Multi-display assembly (w/ Navigation System) | |
| Multi-display assembly (w/o Navigation System) | ||
| Multi-media module receiver assembly | ||
| Air conditioning amplifier assembly | ||
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Diagnostic trouble codes are not stored. Set mode is cleared when engine switch is turned off. | Back-up power source circuit | |
| Air conditioning amplifier assembly |
| Symptom | Suspected Area | See page |
|---|---|---|
| All functions of air conditioning system do not operate | Harness or connector | - |
| IG power source circuit | ||
| Back-up power source circuit | ||
| No. 2 air conditioning control assembly | ||
| Air conditioning amplifier assembly | ||
| Air Flow Control: No blower operation | Rear blower motor circuit | |
| Air conditioning amplifier assembly | ||
| Air Flow Control: Insufficient air flow | Rear blower motor circuit | |
| Air conditioning amplifier assembly | ||
| Temperature Control: No cool air comes out | Volume of refrigerant | |
| Refrigerant pressure | ||
| Cooler compressor assembly | ||
| Pressure sensor circuit | ||
| Rear air mix damper servo motor (for driver side) circuit | ||
| Rear air mix damper servo motor (for front passenger side) circuit | ||
| Rear room temperature sensor circuit | ||
| Rear room temperature sensor circuit | ||
| Ambient temperature sensor circuit | ||
| Evaporator temperature sensor circuit | ||
| Rear evaporator temperature sensor circuit | ||
| Rear magnetic valve circuit | ||
| Rear air mix damper servo motor (for driver side) | ||
| Rear air mix damper servo motor (for front passenger side) | ||
| No. 2 air conditioning harness assembly | - | |
| Air conditioning amplifier assembly | ||
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Temperature Control: No warm air comes out | Rear air mix damper servo motor (for driver side) circuit | |
| Rear air mix damper servo motor (for front passenger side) circuit | ||
| Rear room temperature sensor circuit (for driver side) | ||
| Rear room temperature sensor circuit (for front passenger side) | ||
| Ambient temperature sensor circuit | ||
| Rear air mix damper servo motor (for driver side) | ||
| Rear air mix damper servo motor (for front passenger side) | ||
| No. 2 air conditioning harness assembly | - | |
| Duct sensor circuit (for driver side) | ||
| Duct sensor circuit (for front passenger side) | ||
| Air conditioning amplifier assembly | ||
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) |
| Symptom | Suspected Area | See page |
|---|---|---|
| Cool box malfunction | Cooling box magnetic valve circuit | |
| Cooling box blower motor circuit | ||
| Cooling box control switch circuit | ||
| Cooling box sensor circuit | ||
| Air conditioning amplifier assembly (for cool box) | - | |
| No. 1 cooler wiring harness sub-assembly | - | |
| Noise filter (built into cooling box unit) | - |