Note
Inspect the fuses and relays related to this system before inspecting the suspected areas below.
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.
| 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) | ||
| Navigation system | ||
| Multi-display assembly | ||
| Multi-media module receiver assembly | ||
| Air conditioning amplifier assembly | ||
| Switch operation of multi-media module receiver assembly is not accepted | Harness or connector | - |
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Navigation system | ||
| Multi-display assembly | ||
| 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 | Blower motor circuit | |
| Air conditioning amplifier assembly | ||
| Temperature Control: No cool air comes out | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Volume of refrigerant | ||
| Refrigerant pressure | ||
| Compressor lock sensor circuit | ||
| Air conditioning compressor magnet clutch circuit | ||
| Cooler compressor assembly (for 3UR-FE) | ||
| Cooler compressor assembly (for 1VD-FTV) | ||
| 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) | ||
| Ambient temperature sensor circuit | ||
| Evaporator temperature sensor circuit | ||
| Air conditioning harness assembly | ||
| Air conditioning amplifier assembly | ||
| Temperature Control: No warm air comes out | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| 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) | ||
| Ambient temperature sensor circuit | ||
| Air conditioning harness assembly | ||
| Air conditioning amplifier assembly | ||
| 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 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) | ||
| Ambient temperature sensor circuit | ||
| Cooler compressor assembly (for 3UR-FE) | ||
| Cooler compressor assembly (for 1VD-FTV) | ||
| Heater radiator | - | |
| Air conditioning harness assembly | ||
| Air conditioning amplifier assembly | ||
| Temperature Control: No temperature control (only Max. cool or Max. warm) | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| 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 | ||
| Multi-media module receiver assembly | ||
| Air conditioning harness assembly | ||
| Air conditioning amplifier assembly | ||
| PTC heater does not operate (w/ PTC Heater) | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| PTC heater circuit | ||
| Air conditioning amplifier assembly | ||
| ECM (for 3UR-FE) | ||
| ECM (for 1VD-FTV) | ||
| Viscous with magnet clutch heater assembly does not operate when heater switch assembly is pushed while engine is cold (w/ Heater Switch) | Proceed to "Viscous Heater with Magnet Clutch Circuit" | |
| Engine idle up does not occur when idle up switch is pushed while engine is cold (w/ Idle Up Switch) | Proceed to "Idle Up Switch Circuit" | |
| Power heater does not occur when heater switch assembly is pushed while engine is cold (w/ Heater Switch) | Proceed to "Power Heater Switch Circuit" | |
| No airflow mode control | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Air outlet damper servo motor (for driver side mode) circuit | ||
| Air outlet damper servo motor (for front passenger side mode) circuit | ||
| Air outlet damper servo motor (for rear seat mode) circuit | ||
| Air outlet damper servo motor (for DEF mode) circuit (for RHD) | ||
| Air conditioning harness assembly | ||
| Air conditioning amplifier assembly | ||
| Blinking of A/C indicator | Multi-media module receiver assembly | |
| Air conditioning amplifier assembly | ||
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| ECO mode switch does not operate | ECO switch circuit | |
| Air conditioning amplifier assembly | ||
| Diagnostic trouble codes are not stored. Set mode is cleared when ignition switch is turned off | Back-up power source circuit | |
| Air conditioning amplifier assembly | ||
| Ion generator does not operate (w/ Ion Generator) | Ion generator circuit |
| 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 | ||
| LIN communication line | ||
| Cooler control switch assembly | ||
| Air conditioning amplifier assembly | ||
| Switch operation of Cooler control switch assembly is not accepted | Harness or connector | - |
| LIN communication line | ||
| Cooler control switch assembly | ||
| Air conditioning amplifier assembly | ||
| Air Flow Control: No blower operation | Harness or connector | - |
| 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 | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Volume of refrigerant | ||
| Refrigerant pressure | ||
| Cooler compressor assembly (for 3UR-FE) | ||
| Cooler compressor assembly (for 1VD-FTV) | ||
| 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 (for driver side) | ||
| Rear room temperature sensor (for front passenger side) | ||
| Ambient temperature sensor circuit | ||
| Evaporator temperature sensor circuit | ||
| Rear evaporator temperature sensor circuit | ||
| Rear magnetic valve circuit | ||
| No. 2 air conditioning harness assembly | ||
| Air conditioning amplifier assembly | ||
| Temperature Control: No warm air comes out | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| 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 (for driver side) | ||
| Rear room temperature sensor (for front passenger side) | ||
| Ambient temperature sensor circuit | ||
| Air duct temperature sensor (for driver side) | ||
| Air duct temperature sensor (for front passenger side) | ||
| No. 2 air conditioning harness assembly | ||
| Air conditioning amplifier assembly |
| Symptom | Suspected Area | See page |
|---|---|---|
| Cooling 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) |