AIR CONDITIONING SYSTEM PROBLEM SYMPTOMS TABLE

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.

Air conditioning system
Symptom	Suspected Area	See page
All functions of A/C system do not operate	P-IG1-1, D-IG1-2, A/C fuse	-
	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	IG power source circuit	Click here
	Back-up power source circuit	Click here
	Accessory meter	Click here
	Multi-media module receiver	Click here
	Air conditioning amplifier	Click here
	Harness or connector	-
Switch operation of accessory meter is not accepted	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	Accessory meter	Click here
	Multi-media module receiver	Click here
	Air conditioning amplifier	Click here
	Harness or connector	-
Switch operation of multi-media module receiver is not accepted	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	Multi-media module receiver	Click here
	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	Click here
	Rear power seat switch (for Power Seat)	Click here
	Rear power seat switch (for 5-Passenger Ottoman)	Click here
	Rear power seat switch (for 4-Passenger Ottoman)	Click here
	Air conditioning amplifier	Click here
Air Flow Control: No blower operation	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	Blower motor circuit	Click here
	Accessory meter	Click here
	Multi-media module receiver	Click here
	Air conditioning amplifier	Click here
	Harness or connector	-
Air Flow Control: No blower control	Blower motor circuit	Click here
	Multi-media module receiver	Click here
	Air conditioning amplifier	Click here
Temperature control: Cooling effectiveness is poor	Refrigerant shortage check using the intelligent tester	Click here
	Refrigerant volume	Click here
	Refrigerant pressure	Click here
	Cooler expansion valve	Click here
	Cooler compressor	Click here
	Air conditioning amplifier	Click here
Temperature Control: No cool air comes out	Refrigerant volume	Click here
	Refrigerant pressure	Click here
	Compressor with motor assembly	Click here
	Pressure sensor circuit	Click here
	Air mix servo motor (for Driver side COOL) circuit	Click here
	Air mix servo motor (for Passenger side COOL) circuit	Click here
	Air mix servo motor (for Driver side front A/C rear air flow) circuit	Click here
	Air mix servo motor (for Passenger side front A/C rear air flow) circuit	Click here
	Room temperature sensor circuit	Click here
	Rear room temperature sensor circuit	Click here
	Solar sensor circuit (for Passenger side)	Click here
	Solar sensor circuit (for Driver side)	Click here
	Rear solar sensor circuit	Click here
	Ambient temperature sensor circuit	Click here
	Evaporator temperature sensor circuit	Click here
	Cooler expansion valve	Click here
	Air mix servo motor (for Driver side COOL)	Click here
	Air mix servo motor (for Passenger side COOL)	Click here
	Air mix servo motor (for Driver side front A/C rear air flow)	Click here
	Air mix servo motor (for Passenger side front A/C rear air flow)	Click here
	Air conditioning harness	Click here
	Air conditioning amplifier	Click here
	Front controller	Click here
	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
Temperature Control: No warm air comes out	Air mix servo motor (for Passenger side HOT) circuit	Click here
	Air mix servo motor (for Driver side HOT) circuit	Click here
	Air mix servo motor (for Driver side front A/C rear air flow) circuit	Click here
	Air mix servo motor (for Passenger side front A/C rear air flow) circuit	Click here
	Room temperature sensor circuit	Click here
	Rear room temperature sensor circuit	Click here
	Solar sensor circuit (for Passenger side)	Click here
	Solar sensor circuit (for Driver side)	Click here
	Rear solar sensor circuit	Click here
	Ambient temperature sensor circuit	Click here
	Air mix servo motor (for Passenger side HOT)	Click here
	Air mix servo motor (for Driver side HOT)	Click here
	Air mix servo motor (for Driver side front A/C rear air flow)	Click here
	Air mix servo motor (for Passenger side front A/C rear air flow)	Click here
	Air conditioning harness	Click here
	Air conditioning amplifier	Click here
	Front controller	-
	Luggage room junction block	-
	Hybrid vehicle control ECU	Click here
	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
Temperature Control: Output air is warmer or cooler than set temperature or response is slow	Refrigerant volume	Click here
	Refrigerant pressure	Click here
	Room temperature sensor circuit	Click here
	Rear room temperature sensor circuit	Click here
	Solar sensor circuit (for Passenger side)	Click here
	Solar sensor circuit (for Driver side)	Click here
	Rear solar sensor circuit	Click here
	Ambient temperature sensor circuit	Click here
	Driver side duct sensor	Click here
	Passenger side duct sensor	Click here
	Air mix servo motor (for Passenger side HOT) circuit	Click here
	Air inlet servo motor circuit	Click here
	Air mix servo motor (for Driver side HOT) circuit	Click here
	Air mix servo motor (for Driver side COOL) circuit	Click here
	Air mix servo motor (for Passenger side COOL) circuit	Click here
	Air mix servo motor (for Driver side front A/C rear air flow) circuit	Click here
	Air mix servo motor (for Passenger side front A/C rear air flow) circuit	Click here
	Cool air bypass servo motor (for Driver side) circuit	Click here
	Cool air bypass servo motor (for Passenger side) circuit	Click here
	Max hot bypass servo motor (for HOT) circuit	Click here
	Max hot bypass servo motor (for COOL) circuit	Click here
	Cooler expansion valve	Click here
	Heater radiator	-
	Air mix servo motor (for Passenger side HOT)	Click here
	Air inlet servo motor	Click here
	Air mix servo motor (for Driver side HOT)	Click here
	Air mix servo motor (for Driver side COOL)	Click here
	Air mix servo motor (for Passenger side COOL)	Click here
	Air mix servo motor (for Driver side front A/C rear air flow)	Click here
	Air mix servo motor (for Passenger side front A/C rear air flow)	Click here
	Cool air bypass servo motor (for Driver side)	Click here
	Cool air bypass servo motor (for Passenger side)	Click here
	Max hot bypass servo motor (for HOT)	Click here
	Max hot bypass servo motor (for COOL)	Click here
	Air conditioning harness	Click here
	Air conditioning amplifier	Click here
	Front controller	Click here
	Luggage room junction block	-
	Hybrid vehicle control ECU	Click here
	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
Temperature Control: No temperature control (Only Max. cool or Max. warm)	Room temperature sensor circuit	Click here
	Rear room temperature sensor circuit	Click here
	Ambient temperature sensor circuit	Click here
	Max hot bypass servo motor (for HOT) circuit	Click here
	Max hot bypass servo motor (for COOL) circuit	Click here
	Multi-media module receiver	Click here
	Max hot bypass servo motor (for HOT)	Click here
	Max hot bypass servo motor (for COOL)	Click here
	Air conditioning harness	Click here
	Air conditioning amplifier	Click here
	Luggage room junction block	-
	Hybrid vehicle control ECU	Click here
	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
PTC heater does not operate	PTC heater circuit	Click here
PTC heater does not operate	Air conditioning amplifier	Click here
No air inlet control	Air inlet servo motor circuit	Click here
	Exhaust gas sensor circuit	Click here
	Emission gas NOx sensor circuit	Click here
	Air inlet servo motor	Click here
	Air conditioning harness	Click here
	Air conditioning amplifier	Click here
	Front controller	Click here
Mode does not change when combination switch (ECO mode switch) is operated	Combination switch	Click here
	LIN communication system	Click here
	Outer mirror switch (ECO mode switch)	Click here
	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	ECM	Click here
	Air conditioning amplifier	Click here
No air flow mode control	Air outlet servo motor (for Driver side FACE) circuit	Click here
	Air outlet servo motor (for Passenger side FACE) circuit	Click here
	Air outlet servo motor (for Driver side FOOT/DEF) circuit	Click here
	Air outlet servo motor (for Passenger side FOOT/DEF) circuit	Click here
	Air outlet servo motor (for Driver side front A/C rear air flow) circuit	Click here
	Air outlet servo motor (for Passenger side front A/C rear air flow) circuit	Click here
	Infrared ray sensor circuit	Click here
	Infrared ray sensor communication malfunction	Click here
	LIN communication system	Click here
	Air outlet servo motor (for Driver side FACE)	Click here
	Air outlet servo motor (for Passenger side FACE)	Click here
	Air outlet servo motor (for Driver side FOOT/DEF)	Click here
	Air outlet servo motor (for Passenger side FOOT/DEF)	Click here
	Air outlet servo motor (for Driver side front A/C rear air flow)	Click here
	Air outlet servo motor (for Passenger side front A/C rear air flow)	Click here
	Air conditioning harness	Click here
	Air conditioning amplifier	Click here
Diagnostic trouble codes are not recorded. Set mode is cleared when power switch is turned off.	Back-up power source circuit	Click here
	Air conditioning amplifier	Click here

Rear cooler unit
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	Click here
	IG power source circuit	Click here
	Back-up power source circuit	Click here
	Rear power seat switch (for Power Seat)	Click here
	Rear power seat switch (for 5-Passenger Ottoman)	Click here
	Rear power seat switch (for 4-Passenger Ottoman)	Click here
	Rear air conditioning control panel circuit	Click here
	Air conditioning amplifier	Click here
Air Flow Control: No blower operation	Rear blower motor circuit	Click here
Air Flow Control: No blower operation	Air conditioning amplifier	Click here
Air Flow Control: Insufficient air flow	Rear blower motor circuit	Click here
	Rear air outlet servo motor (for LH side) circuit	Click here
	Rear air outlet servo motor (for RH side) circuit	Click here
	Rear exhaust mode servo motor (for Emission) circuit	Click here
	Rear exhaust mode servo motor (for Diffusion) circuit	Click here
	Rear air outlet servo motor (for LH side) (w/ Rear Cooler)	Click here
	Rear air outlet servo motor (for RH side) (w/ Rear Cooler)	Click here
	Rear exhaust mode servo motor (for Emission) (w/ Rear Cooler)	Click here
	Rear exhaust mode servo motor (for Diffusion) (w/ Rear Cooler)	Click here
	Rear air conditioning harness	Click here
	Air conditioning amplifier	Click here
Temperature Control: No cool air comes out	Refrigerant volume	Click here
	Refrigerant pressure	Click here
	Compressor with motor assembly	Click here
	Pressure sensor circuit	Click here
	Rear air outlet servo motor (for LH side) circuit	Click here
	Rear air outlet servo motor (for RH side) circuit	Click here
	Rear exhaust mode servo motor (for Emission) circuit	Click here
	Rear exhaust mode servo motor (for Diffusion) circuit	Click here
	Rear room temperature sensor circuit	Click here
	Rear solar sensor circuit	Click here
	Ambient temperature sensor circuit	Click here
	Evaporator temperature sensor circuit	Click here
	Rear magnetic valve circuit	Click here
	Rear air outlet servo motor (for LH side) (w/ Rear Cooler)	Click here
	Rear air outlet servo motor (for RH side) (w/ Rear Cooler)	Click here
	Rear exhaust mode servo motor (for Emission) (w/ Rear Cooler)	Click here
	Rear exhaust mode servo motor (for Diffusion) (w/ Rear Cooler)	Click here
	Rear air conditioning harness	Click here
	Air conditioning amplifier	Click here
	Front controller	-
	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
No air flow mode control	Rear air outlet servo motor (for LH side) circuit	Click here
	Rear air outlet servo motor (for RH side) circuit	Click here
	Rear exhaust mode servo motor (for Emission) circuit	Click here
	Rear exhaust mode servo motor (for Diffusion) circuit	Click here
	Infrared ray sensor circuit	Click here
	Infrared ray sensor communication malfunction	Click here
	LIN communication system	Click here
	Rear air outlet servo motor (for LH side) (w/ Rear Cooler)	Click here
	Rear air outlet servo motor (for RH side) (w/ Rear Cooler)	Click here
	Rear exhaust mode servo motor (for Emission) (w/ Rear Cooler)	Click here
	Rear exhaust mode servo motor (for Diffusion) (w/ Rear Cooler)	Click here
	Rear air conditioning harness	Click here
	Air conditioning amplifier	Click here
Air purifier does not operate	Smoke sensor circuit	Click here
	Rear junction block ECU	-
	Rear exhaust mode servo motor (for Diffusion) circuit	Click here
	Rear exhaust mode servo motor (for Diffusion) (w/ Rear Cooler)	Click here
	Rear air conditioning harness	Click here
	Air conditioning amplifier	Click here
	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
A/C system does not cool HV battery	HV battery cool down servo motor circuit	Click here
	HV battery cool down servo motor (w/ Rear Cooler)	Click here
	HV battery cool down servo motor (w/o Rear Cooler)	Click here
	Rear air conditioning harness (w/ Rear Cooler)	Click here
	Rear air conditioning harness (w/o Rear Cooler)	Click here
	Air conditioning amplifier	Click here
	Hybrid battery system	Click here