Use the table below to help determine the cause of the problem symptom. 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.
The electrical equipment operation may be limited by the load control of electric power control system. Follow the HOW TO PROCEED WITH TROUBLESHOOTING procedures.
*1: If an attempt is made to operate the PTC heater when the voltage of the vehicle battery has decreased, the PTC heater will not operate as the power steering system is given priority.
*2: Even when all the inspected areas are normal, the system may not change to the driver seat control mode due to the ambient temperature, etc. Also, even if the front passenger seat is unoccupied, the system may not change to the driver seat control mode due to control conditions.
| Symptom | Suspected Area | See page |
|---|---|---|
| All functions of A/C system do not operate | P-IG1-1, E/G RM-IG1-2, A/C fuse | - |
| Harness or connector | - | |
| IG power source circuit | ||
| Back-up power source circuit | ||
| Accessory meter | ||
| Multi-media module receiver | ||
| Air conditioning amplifier | ||
| Switch operation of accessory meter is not accepted | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Accessory meter | ||
| Multi-media module receiver | ||
| Air conditioning amplifier | ||
| Harness or connector | - | |
| Switch operation of multi-media module receiver is not accepted | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Multi-media module receiver | ||
| Air conditioning amplifier | ||
| Harness or connector | - | |
| Switch operation of rear control switch is not accepted | Check rear air conditioning operation canceled from accessory meter | - |
| Rear air conditioning control panel circuit | ||
| Rear power seat switch (for Power Seat) | ||
| Rear power seat switch (for 5-Passenger with Ottoman) | ||
| Rear power seat switch (for 4-Passenger with Ottoman) | ||
| Rear power seat switch (for Fixed Seat Type) | ||
| Air conditioning amplifier | ||
| Air Flow Control: No blower operation | Blower motor circuit | |
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Accessory meter | ||
| Multi-media module receiver | ||
| Air conditioning amplifier | ||
| Harness or connector | - | |
| Temperature control: Cooling effectiveness is poor | Refrigerant shortage check using the intelligent tester | |
| Refrigerant volume | ||
| Refrigerant pressure | ||
| Cooler expansion valve | - | |
| Cooler compressor (for 2WD) | ||
| Cooler compressor (for AWD) | ||
| Air conditioning amplifier | ||
| Air Flow Control: Insufficient air flow | Blower motor circuit | |
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Multi-media module receiver | ||
| Air conditioning amplifier | ||
| Harness or connector | - | |
| Temperature Control: No cool air comes out | Volume of refrigerant | |
| Refrigerant pressure | ||
| Compressor and pulley (for 2WD) | ||
| Compressor and pulley (for AWD) | ||
| Pressure sensor circuit | ||
| Compressor solenoid circuit | ||
| Air mix servo motor (for Driver side COOL) circuit | ||
| Air mix servo motor (for Passenger side COOL) circuit | ||
| Air mix servo motor (for Driver side front A/C rear air flow) circuit (w/ 4-ZONE Switch) | ||
| Air mix servo motor (for Passenger side front A/C rear air flow) circuit (w/ 4-ZONE Switch) | ||
| Room temperature sensor circuit | ||
| Rear room temperature sensor circuit | ||
| Solar sensor circuit (for Passenger side) | ||
| Solar sensor circuit (for Driver side) | ||
| Rear solar sensor circuit | ||
| Ambient temperature sensor circuit | ||
| Evaporator temperature sensor circuit | ||
| Cooler expansion valve | - | |
| Air mix servo motor (for Driver side COOL) | ||
| Air mix servo motor (for Passenger side COOL) | ||
| Air mix servo motor (for Driver side front A/C rear air flow) (w/ 4-ZONE Switch) | ||
| Air mix servo motor (for Passenger side front A/C rear air flow) (w/ 4-ZONE Switch) | ||
| Air conditioning harness | ||
| Air conditioning amplifier | ||
| Front light ECU (Front controller) | - | |
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Temperature Control: No warm air comes out | Air mix servo motor (for Passenger side HOT) circuit | |
| Air mix servo motor (for Driver side HOT) circuit | ||
| Air mix servo motor (for Driver side front A/C rear air flow) circuit (w/ 4-ZONE Switch) | ||
| Air mix servo motor (for Passenger side front A/C rear air flow) circuit (w/ 4-ZONE Switch) | ||
| Room temperature sensor circuit | ||
| Rear room temperature sensor circuit | ||
| Solar sensor circuit (for Passenger side) | ||
| Solar sensor circuit (for Driver side) | ||
| Rear solar sensor circuit | ||
| Ambient temperature sensor circuit | ||
| Air mix servo motor (for Passenger side HOT) | ||
| Air mix servo motor (for Driver side HOT) | ||
| Air mix servo motor (for Driver side front A/C rear air flow) (w/ 4-ZONE Switch) | ||
| Air mix servo motor (for Passenger side front A/C rear air flow) (w/ 4-ZONE Switch) | ||
| Air conditioning harness | ||
| Air conditioning amplifier | ||
| Front light ECU (Front controller) | - | |
| 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 | ||
| Room temperature sensor circuit | ||
| Rear room temperature sensor circuit | ||
| Solar sensor circuit (for Passenger side) | ||
| Solar sensor circuit (for Driver side) | ||
| Rear solar sensor circuit | ||
| Ambient temperature sensor circuit | ||
| Driver side duct sensor | ||
| Passenger side duct sensor | ||
| Air mix servo motor (for Passenger side HOT) circuit | ||
| Air inlet servo motor circuit | ||
| Air mix servo motor (for Driver side HOT) circuit | ||
| Air mix servo motor (for Driver side COOL) circuit | ||
| Air mix servo motor (for Passenger side COOL) circuit | ||
| Air mix servo motor (for Driver side front A/C rear air flow) circuit (w/ 4-ZONE Switch) | ||
| Air mix servo motor (for Passenger side front A/C rear air flow) circuit (w/ 4-ZONE Switch) | ||
| Cool air bypass servo motor (for Driver side) circuit | ||
| Cool air bypass servo motor (for Passenger side) circuit | ||
| Max hot bypass servo motor (for HOT) circuit | ||
| Max hot bypass servo motor (for COOL) circuit | ||
| Cooler expansion valve | - | |
| Heater radiator | - | |
| Air mix servo motor (for Passenger side HOT) | ||
| Air inlet servo motor | ||
| Air mix servo motor (for Driver side HOT) | ||
| Air mix servo motor (for Driver side COOL) | ||
| Air mix servo motor (for Passenger side COOL) | ||
| Air mix servo motor (for Driver side front A/C rear air flow) (w/ 4-ZONE Switch) | ||
| Air mix servo motor (for Passenger side front A/C rear air flow) (w/ 4-ZONE Switch) | ||
| Cool air bypass servo motor (for Driver side) | ||
| Cool air bypass servo motor (for Passenger side) | ||
| Max hot bypass servo motor (for HOT) | ||
| Max hot bypass servo motor (for COOL) | ||
| Air conditioning harness | ||
| Air conditioning amplifier | ||
| Front light ECU (Front controller) | - | |
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Temperature Control: No temperature control (Only Max. cool or Max. warm) | Room temperature sensor circuit | |
| Rear room temperature sensor circuit | ||
| Ambient temperature sensor circuit | ||
| Max hot bypass servo motor (for HOT) circuit | ||
| Max hot bypass servo motor (for COOL) circuit | ||
| Multi-media module receiver | ||
| Max hot bypass servo motor (for HOT) | ||
| Max hot bypass servo motor (for COOL) | ||
| Air conditioning harness | ||
| Air conditioning amplifier | ||
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| PTC heater does not operate | PTC heater circuit | |
| Air conditioning amplifier | ||
| No air inlet control | Air inlet servo motor circuit | |
| Exhaust gas sensor circuit | ||
| Emission gas NOx sensor circuit | ||
| Air inlet servo motor | ||
| Air conditioning harness | ||
| Air conditioning amplifier | ||
| Front light ECU (Front controller) | - | |
| No air flow mode control | Air outlet servo motor (for Driver side FACE) circuit | |
| Air outlet servo motor (for Passenger side FACE) circuit | ||
| Air outlet servo motor (for Driver side FOOT/DEF) circuit | ||
| Air outlet servo motor (for Passenger side FOOT/DEF) circuit | ||
| Air outlet servo motor (for Driver side front A/C rear air flow) circuit | ||
| Air outlet servo motor (for Passenger side front A/C rear air flow) circuit | ||
| Infrared ray sensor circuit | ||
| Infrared ray sensor communication malfunction | ||
| LIN communication system | ||
| Air outlet servo motor (for Driver side FACE) | ||
| Air outlet servo motor (for Passenger side FACE) | ||
| Air outlet servo motor (for Driver side FOOT/DEF) | ||
| Air outlet servo motor (for Passenger side FOOT/DEF) | ||
| Air outlet servo motor (for Driver side front A/C rear air flow) | ||
| Air outlet servo motor (for Passenger side front A/C rear air flow) | ||
| Air conditioning harness | ||
| Air conditioning amplifier | ||
| Mode does not change when combination switch (ECO mode switch) is operated | Combination switch (ECO mode switch) (for AA80F) | |
| Combination switch (ECO mode switch) (AA80E) | ||
| LIN communication system | ||
| Outer mirror switch | ||
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| ECM (for 1UR-FSE) | ||
| ECM (for 1UR-FE) | ||
| Air conditioning amplifier | ||
| Diagnostic trouble codes are not recorded. Set mode is cleared when engine switch turned off. | Back-up power source circuit | |
| Air conditioning amplifier | ||
| Ion generator does not operate (w/ Ion Generator) | Ion generator circuit | |
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Multi-media module receiver | ||
| Accessory meter | ||
| Ion generator | ||
| Air conditioning amplifier | ||
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| All functions of A/C system do not operate | RR-IG1-2, RR MPX-B2, RR A/C fuse | - |
| Harness or connector | - | |
| LIN communication system | ||
| IG power source circuit | ||
| Back-up power source circuit | ||
| Rear power seat switch (for Fixed Seat Type) | ||
| Rear power seat switch (for Power Seat Type) | ||
| Rear power seat switch (for 5-Passenger with Ottoman) | ||
| Rear power seat switch (for 4-Passenger with Ottoman) | ||
| Rear air conditioning control panel circuit | ||
| Air conditioning amplifier | ||
| Air Flow Control: No blower operation | Rear blower motor circuit | |
| Air conditioning amplifier | ||
| Air Flow Control: Insufficient air flow | Rear blower motor circuit | |
| Rear air outlet servo motor (for LH side) circuit | ||
| Rear air outlet servo motor (for RH side) circuit | ||
| Rear exhaust mode servo motor (for Emission) circuit | ||
| Rear exhaust mode servo motor (for Diffusion) circuit | ||
| Rear air outlet servo motor (for LH side) | ||
| Rear air outlet servo motor (for RH side) | ||
| Rear exhaust mode servo motor (for Emission) | ||
| Rear exhaust mode servo motor (for Diffusion) | ||
| Rear air conditioning harness | - | |
| Air conditioning amplifier | ||
| Temperature Control: No cool air comes out | Volume of refrigerant | |
| Refrigerant pressure | ||
| Compressor and pulley (for 2WD) | ||
| Compressor and pulley (for AWD) | ||
| Pressure sensor circuit | ||
| Compressor solenoid circuit | ||
| Rear air outlet servo motor (for LH side) circuit | ||
| Rear air outlet servo motor (for RH side) circuit | ||
| Rear exhaust mode servo motor (for Emission) circuit | ||
| Rear exhaust mode servo motor (for Diffusion) circuit | ||
| Rear room temperature sensor circuit | ||
| Rear solar sensor circuit | ||
| Ambient temperature sensor circuit | ||
| Evaporator temperature sensor circuit | ||
| Rear magnetic valve circuit | ||
| Rear air outlet servo motor (for LH side) | ||
| Rear air outlet servo motor (for RH side) | ||
| Rear exhaust mode servo motor (for Emission) | ||
| Rear exhaust mode servo motor (for Diffusion) | ||
| Rear air conditioning harness | - | |
| Air conditioning amplifier | ||
| Front light ECU (Front controller) | - | |
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| No air flow mode control | Rear air outlet servo motor (for LH side) circuit | |
| Rear air outlet servo motor (for RH side) circuit | ||
| Rear exhaust mode servo motor (for Emission) circuit | ||
| Rear exhaust mode servo motor (for Diffusion) circuit | ||
| Infrared ray sensor circuit | ||
| Infrared ray sensor communication malfunction | ||
| LIN communication system | ||
| Rear air outlet servo motor (for LH side) | ||
| Rear air outlet servo motor (for RH side) | ||
| Rear exhaust mode servo motor (for Emission) | ||
| Rear exhaust mode servo motor (for Diffusion) | ||
| Rear air conditioning harness | - | |
| Air conditioning amplifier | ||
| Air purifier does not operate | Smoke sensor circuit | |
| Rear junction block ECU | - | |
| Rear exhaust mode servo motor (for Diffusion) circuit | ||
| Rear exhaust mode servo motor (for Diffusion) | ||
| Rear air conditioning harness | - | |
| Air conditioning amplifier | ||
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) |