AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System) PROBLEM SYMPTOMS TABLE

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.

Air Conditioning Unit Assembly
Symptom	Suspected Area	See page
All functions of air conditioning system do not operate	Harness or connector	-
	IG power source circuit	Click here
	Back-up power source circuit	Click here
	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	LIN communication system*1	Click here
	Air conditioning control assembly*1	Click here
	Navigation system*2	Click here
	Multi-display assembly*2	Click here
	Multi-media module receiver assembly*2	Click here
	Air conditioning amplifier assembly	Click here
Switch operation of air conditioning control assembly is not accepted*1	Harness or connector	-
	LIN communication system	Click here
	Air conditioning control assembly	Click here
	Air conditioning amplifier assembly	Click here
Switch operation of multi-media module receiver assembly is not accepted*2	Harness or connector	-
	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	Navigation system	Click here
	Multi-display assembly	Click here
	Multi-media module receiver assembly	Click here
	Air conditioning amplifier assembly	Click here
Switch operation of temperature control switch assembly is not accepted	Heater control switch circuit	Click here
	Navigation system*2	Click here
	Multi-media module receiver assembly*2	Click here
	Air conditioning amplifier assembly	Click here
	Harness or connector	-
Air Flow Control: No blower operation	Harness or connector	-
	Blower motor circuit	Click here
	Air conditioning amplifier assembly	Click here
Air Flow Control: Insufficient air flow	Blower motor circuit	Click here
Air Flow Control: Insufficient air flow	Air conditioning amplifier assembly	Click here
Temperature Control: No cool air comes out	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	Volume of refrigerant	Click here
	Refrigerant pressure	Click here
	Compressor lock sensor circuit	Click here
	Air conditioning compressor magnet clutch circuit	Click here
	Cooler compressor assembly (1GR-FE)	Click here
	Cooler compressor assembly (1UR-FE)	Click here
	Cooler compressor assembly (3UR-FE)	Click here
	Cooler compressor assembly (1VD-FTV)	Click here
	Pressure sensor circuit	Click here
	Front air mix damper servo motor (for driver side) circuit	Click here
	Front air mix damper servo motor (for driver side rear air flow) circuit	Click here
	Front air mix damper servo motor (for front passenger side) circuit	Click here
	Front air mix damper servo motor (for front passenger side rear air flow) circuit	Click here
	Room temperature sensor circuit	Click here
	Rear room temperature sensor circuit (for driver side)*4	Click here
	Rear room temperature sensor circuit (for front passenger side)*4	Click here
	Solar sensor circuit (for driver side)	Click here
	Solar sensor circuit (for front passenger side)	Click here
	Ambient temperature sensor circuit	Click here
	Evaporator temperature sensor circuit	Click here
	Air mix damper servo motor (for driver side) (for LHD)	Click here
	Air mix damper servo motor (for driver side) (for RHD)	Click here
	Front air mix damper servo motor (for driver side rear air flow) (for LHD)	Click here
	Front air mix damper servo motor (for driver side rear air flow) (for RHD)	Click here
	Air mix damper servo motor (for front passenger side) (for LHD)	Click here
	Air mix damper servo motor (for front passenger side) (for RHD)	Click here
	Front air mix damper servo motor (for front passenger side rear air flow) (for LHD)	Click here
	Front air mix damper servo motor (for front passenger side rear air flow) (for RHD)	Click here
	Air conditioning harness assembly	Click here
	Air conditioning amplifier assembly	Click here
Temperature Control: No warm air comes out	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	Front air mix damper servo motor (for driver side) circuit	Click here
	Front air mix damper servo motor (for driver side rear air flow) circuit	Click here
	Front air mix damper servo motor (for front passenger side) circuit	Click here
	Front air mix damper servo motor (for front passenger side rear air flow) circuit	Click here
	Room temperature sensor circuit	Click here
	Rear room temperature sensor circuit (for driver side)*4	Click here
	Rear room temperature sensor circuit (for front passenger side)*4	Click here
	Solar sensor circuit (for driver side)	Click here
	Solar sensor circuit (for front passenger side)	Click here
	Ambient temperature sensor circuit	Click here
	Air mix damper servo motor (for driver side) (for LHD)	Click here
	Air mix damper servo motor (for driver side) (for RHD)	Click here
	Front air mix damper servo motor (for driver side rear air flow) (for LHD)	Click here
	Front air mix damper servo motor (for driver side rear air flow) (for RHD)	Click here
	Air mix damper servo motor (for front passenger side) (for LHD)	Click here
	Air mix damper servo motor (for front passenger side) (for RHD)	Click here
	Front air mix damper servo motor (for front passenger side rear air flow) (for LHD)	Click here
	Front air mix damper servo motor (for front passenger side rear air flow) (for RHD)	Click here
	Air conditioning harness assembly	Click here
	Air conditioning amplifier assembly	Click here
Temperature Control: Output air is warmer or cooler than the set temperature or response is slow	Volume of refrigerant	Click here
	Refrigerant pressure	Click here
	Front air mix damper servo motor (for driver side) circuit	Click here
	Front air mix damper servo motor (for driver side rear air flow) circuit	Click here
	Front air mix damper servo motor (for front passenger side) circuit	Click here
	Front air mix damper servo motor (for passenger side rear air flow) circuit	Click here
	REC/FRS damper servo motor circuit	Click here
	Cool air bypass damper servo motor circuit	Click here
	Room temperature sensor circuit	Click here
	Rear room temperature sensor circuit (for driver side)*4	Click here
	Rear room temperature sensor circuit (for front passenger side)*4	Click here
	Solar sensor circuit (for driver side)	Click here
	Solar sensor circuit (for front passenger side)	Click here
	Ambient temperature sensor circuit	Click here
	Cooler compressor assembly (1GR-FE)	Click here
	Cooler compressor assembly (1UR-FE)	Click here
	Cooler compressor assembly (3UR-FE)	Click here
	Cooler compressor assembly (1VD-FTV)	Click here
	Heater radiator	-
	Air mix damper servo motor (for driver side) (for LHD)	Click here
	Air mix damper servo motor (for driver side) (for RHD)	Click here
	Front air mix damper servo motor (for driver side rear air flow) (for LHD)	Click here
	Front air mix damper servo motor (for driver side rear air flow) (for RHD)	Click here
	Air mix damper servo motor (for front passenger side) (for LHD)	Click here
	Air mix damper servo motor (for front passenger side) (for RHD)	Click here
	Front air mix damper servo motor (for front passenger side rear air flow) (for LHD)	Click here
	Front air mix damper servo motor (for front passenger side rear air flow) (for RHD)	Click here
	REC/FRS damper servo motor (for LHD)	Click here
	REC/FRS damper servo motor (for RHD)	Click here
	Cool air bypass damper servo motor (for LHD)	Click here
	Cool air bypass damper servo motor (for LHD)	Click here
	Air conditioning harness assembly	Click here
	Air conditioning amplifier assembly	Click here
Temperature Control: No temperature control (only Max. cool or Max. warm)	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	Room temperature sensor circuit	Click here
	Rear room temperature sensor circuit (for driver side)*4	Click here
	Rear room temperature sensor circuit (for front passenger side)*4	Click here
	Ambient temperature sensor circuit	Click here
	Cool air bypass damper servo motor circuit	Click here
	Front air mix damper servo motor (for driver side) circuit	Click here
	Front air mix damper servo motor (for driver side rear air flow) circuit	Click here
	Front air mix damper servo motor (for front passenger side) circuit	Click here
	Front air mix damper servo motor (for front passenger side rear air flow) circuit	Click here
	Air conditioning control assembly*1	Click here
	Multi-display assembly*2	Click here
	Multi-media module receiver assembly*2	Click here
	Cool air bypass damper servo motor (for LHD)	Click here
	Cool air bypass damper servo motor (for RHD)	Click here
	Air mix damper servo motor (for driver side) (for LHD)	Click here
	Air mix damper servo motor (for driver side) (for RHD)	Click here
	Front air mix damper servo motor (for driver side rear air flow) (for LHD)	Click here
	Front air mix damper servo motor (for driver side rear air flow) (for RHD)	Click here
	Air mix damper servo motor (for front passenger side) (for LHD)	Click here
	Air mix damper servo motor (for front passenger side) (for RHD)	Click here
	Front air mix damper servo motor (for front passenger side rear air flow) (for LHD)	Click here
	Front air mix damper servo motor (for front passenger side rear air flow) (for RHD)	Click here
	Air conditioning harness assembly	Click here
	Air conditioning amplifier assembly	Click here
PTC heater does not operate*3	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	PTC heater circuit	Click here
	Air conditioning amplifier assembly	Click here
	ECM (1GR-FE)	Click here
	ECM (1UR-FE)	Click here
	ECM (3UR-FE)	Click here
No airflow mode control	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	Air outlet damper servo motor (for driver side mode) circuit	Click here
	Air outlet damper servo motor (for front passenger side mode) circuit	Click here
	Air outlet damper servo motor (for rear seat mode) circuit	Click here
	Air outlet damper servo motor (for DEF mode) circuit4, 5	Click here
	Air outlet damper servo motor (for driver side mode) (for LHD)	Click here
	Air outlet damper servo motor (for driver side mode) (for RHD)	Click here
	Air outlet damper servo motor (for front passenger side mode) (for LHD)	Click here
	Air outlet damper servo motor (for front passenger side mode) (for RHD)	Click here
	Air outlet damper servo motor (for rear seat mode) (for LHD)	Click here
	Air outlet damper servo motor (for rear seat mode) (for RHD)	Click here
	Air outlet damper servo motor (for DEF mode) (for RHD)	Click here
	Air conditioning harness assembly	Click here
	Air conditioning amplifier assembly	Click here
Blinking of A/C indicator	Air conditioning control assembly*1	Click here
	Multi-media module receiver assembly*2	Click here
	Air conditioning amplifier assembly	Click here
	LIN communication system*1	Click here
	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
Diagnostic trouble codes are not stored. Set mode is cleared when engine switch is turned off	Back-up power source circuit	Click here
	Air conditioning amplifier assembly	Click here

*1: w/o Navigation System
*2: w/ Navigation System
*3: w/ PTC Heater
*4: for 4-ZONE Type
*5: for RHD

Rear Cooling Unit Assembly (w/ Rear Heater)
Symptom	Suspected Area	See page
All functions of air conditioning system do not operate	Harness or connector	-
	LIN communication system	Click here
	IG power source circuit	Click here
	Back-up power source circuit	Click here
	No. 2 air conditioning control assembly	Click here
	Air conditioning amplifier assembly	Click here
Switch operation of No. 2 air conditioning control assembly is not accepted	Harness or connector	-
	LIN communication system	Click here
	No. 2 air conditioning control assembly	Click here
	Air conditioning amplifier assembly	Click here
Air Flow Control: No blower operation	Harness or connector	-
	Rear blower motor circuit	Click here
	Air conditioning amplifier assembly	Click here
Air Flow Control: Insufficient air flow	Rear blower motor circuit	Click here
Air Flow Control: Insufficient air flow	Air conditioning amplifier assembly	Click here
Temperature Control: No cool air comes out	CAN communication system (for LHD)*	Click here
	CAN communication system (for RHD)*	Click here
	Volume of refrigerant	Click here
	Refrigerant pressure	Click here
	Cooler compressor assembly (1GR-FE)	Click here
	Cooler compressor assembly (1UR-FE)	Click here
	Cooler compressor assembly (3UR-FE)	Click here
	Cooler compressor assembly (1VD-FTV)	Click here
	Pressure sensor circuit	Click here
	Rear air mix damper servo motor (for driver side) circuit*	Click here
	Rear air mix damper servo motor (for front passenger side) circuit*	Click here
	Rear room temperature sensor (for driver side)*	Click here
	Rear room temperature sensor (for front passenger side)*	Click here
	Ambient temperature sensor circuit	Click here
	Evaporator temperature sensor circuit	Click here
	Rear evaporator temperature sensor circuit*	Click here
	Rear magnetic valve circuit	Click here
	Rear air mix damper servo motor LH	Click here
	Rear air mix damper servo motor RH	Click here
	No. 2 air conditioning harness assembly	Click here
	Air conditioning amplifier assembly	Click here
Temperature Control: No warm air comes out*	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	Rear air mix damper servo motor (for driver side) circuit	Click here
	Rear air mix damper servo motor (for front passenger side) circuit	Click here
	Rear room temperature sensor (for driver side)	Click here
	Rear room temperature sensor (for front passenger side)	Click here
	Ambient temperature sensor circuit	Click here
	Rear air mix damper servo motor LH	Click here
	Rear air mix damper servo motor RH	Click here
	No. 2 air conditioning harness assembly	Click here
	Air duct temperature sensor (for driver side)	Click here
	Air duct temperature sensor (for front passenger side)	Click here
	Air conditioning amplifier assembly	Click here

*: for 4-ZONE Type

Rear Cooling Unit Assembly (w/o Rear Heater)
Symptom	Suspected Area	See page
All functions of air conditioning system do not operate	Harness or connector	-
	IG power source circuit	Click here
	Back-up power source circuit	Click here
	No. 2 air conditioning control assembly	Click here
	Air conditioning amplifier assembly	Click here
Air Flow Control: No blower operation	Rear blower motor circuit	Click here
Air Flow Control: No blower operation	Air conditioning amplifier assembly	Click here
Air Flow Control: Insufficient air flow	Rear blower motor circuit	Click here
Air Flow Control: Insufficient air flow	Air conditioning amplifier assembly	Click here
Temperature Control: No cool air comes out	Volume of refrigerant	Click here
	Refrigerant pressure	Click here
	Cooler compressor assembly (1GR-FE)	Click here
	Cooler compressor assembly (1UR-FE)	Click here
	Cooler compressor assembly (3UR-FE)	Click here
	Cooler compressor assembly (1VD-FTV)	Click here
	Pressure sensor circuit	Click here
	Ambient temperature sensor circuit	Click here
	Evaporator temperature sensor circuit	Click here
	Rear magnetic valve circuit	Click here
	No. 2 air conditioning harness assembly	Click here
	Air conditioning amplifier assembly	Click here

Cooling Box Assembly (w/ Cooling Box)
Symptom	Suspected Area	See page
Cooling box malfunction	Cooling box magnetic valve circuit	Click here
	Cooling box blower motor circuit	Click here
	Cooling box control switch circuit	Click here
	Cooling box sensor circuit	Click here
	Air conditioning amplifier assembly (for cool box)	-
	No. 1 cooler wiring harness sub-assembly	-
	Noise filter (built into cooling box unit)	-