AIR CONDITIONING SYSTEM PROBLEM SYMPTOMS TABLE

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.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.

Air Conditioning System
Symptom	Suspected Area	See page
All functions of the A/C system do not operate	IG power source circuit	Click here
	Back-up power source circuit	Click here
	LIN communication circuit	Click here
	Air conditioning amplifier assembly*7	Click here
	Air conditioning amplifier assembly*8	Click here
System does not respond to operation of switches on the A/C panel	Check the cooler control switch assembly. (Check to see if the temperature adjustment switch is stuck on.)*4	-
	Check the cooler control switch assembly temperature display. (Check to see if the display change when the temperature adjustment switch is operated.)*4	-
	LIN communication circuit	Click here
	Air conditioning amplifier assembly*7	Click here
	Air conditioning amplifier assembly*8	Click here
Air flow control: No blower operation	Blower motor circuit	Click here
	LIN communication circuit	Click here
	Air conditioning amplifier assembly*7	Click here
	Air conditioning amplifier assembly*8	Click here
Air flow control: No blower control	Blower motor circuit	Click here
	LIN communication circuit	Click here
	Air conditioning amplifier assembly*7	Click here
	Air conditioning amplifier assembly*8	Click here
Air flow control: Insufficient air flow	Blower motor circuit	Click here
	Air conditioning amplifier assembly*7	Click here
	Air conditioning amplifier assembly*8	Click here
Temperature control: Cooling effectiveness is poor	Refrigerant shortage check using the intelligent tester	Click here
	Cooling performance	Click here
	Refrigerant volume*7	Click here
	Refrigerant volume*8	Click here
	Refrigerant pressure*7	Click here
	Refrigerant pressure*8	Click here
	Compressor and magnet clutch*1	Click here
	Compressor assembly with pulley*2	Click here
	Compressor assembly with pulley*3	Click here
	Air conditioning amplifier assembly*7	Click here
	Air conditioning amplifier assembly*8	Click here
Temperature control: No cool air comes out	Refrigerant shortage check using the intelligent tester	Click here
	Refrigerant volume*7	Click here
	Refrigerant volume*8	Click here
	Refrigerant pressure*7	Click here
	Refrigerant pressure*8	Click here
	Air conditioning pressure sensor circuit	Click here
	Air conditioning compressor magnetic clutch circuit*1	Click here
	Compressor lock sensor circuit*1	Click here
	Compressor solenoid circuit	Click here
	A/C flow sensor circuit	Click here
	Air mix damper control servo motor circuit (for driver side)	Click here
	Air mix damper control servo motor circuit (for front passenger side)	Click here
	Evaporator temperature sensor circuit	Click here
	Room temperature sensor circuit	Click here
	Ambient temperature sensor circuit	Click here
	LIN communication circuit	Click here
	Cooler expansion valve*7	Click here
	Cooler expansion valve*8	Click here
	Engine room junction block assembly*1	Click here
	Air conditioning amplifier assembly*7	Click here
	Air conditioning amplifier assembly*8	Click here
	ECM*1	Click here
	ECM*2	Click here
	ECM*3	Click here
Temperature control: No warm air comes out	Air mix damper control servo motor circuit (for driver side)	Click here
	Air mix damper control servo motor circuit (for front passenger side)	Click here
	Evaporator temperature sensor circuit	Click here
	Room temperature sensor circuit	Click here
	Ambient temperature sensor circuit	Click here
	LIN communication circuit	Click here
	PTC heater circuit*5	Click here
	Air conditioning amplifier assembly*7	Click here
	Air conditioning amplifier assembly*8	Click here
	ECM*1	Click here
	ECM*2	Click here
	ECM*3	Click here
Temperature control: Output air is warmer or cooler than the set temperature or response is slow	Refrigerant shortage check using the intelligent tester	Click here
	Refrigerant volume*7	Click here
	Refrigerant volume*8	Click here
	Refrigerant pressure*7	Click here
	Refrigerant pressure*8	Click here
	Air conditioning compressor magnetic clutch circuit*1	Click here
	Compressor lock sensor circuit*1	Click here
	Compressor solenoid circuit	Click here
	Solar sensor circuit (for driver side)	Click here
	Solar sensor circuit (for front passenger side)	Click here
	Room temperature sensor circuit	Click here
	Ambient temperature sensor circuit	Click here
	Air mix damper control servo motor circuit (for driver side)	Click here
	Air mix damper control servo motor circuit (for front passenger side)	Click here
	Air inlet damper control servo motor circuit	Click here
	LIN communication circuit	Click here
	PTC heater circuit*5	Click here
	Heater radiator unit sub-assembly*7	Click here
	Heater radiator unit sub-assembly*8	Click here
	Cooler expansion valve*7	Click here
	Cooler expansion valve*8	Click here
	Engine room junction block assembly*1	Click here
	Air conditioning amplifier assembly*7	Click here
	Air conditioning amplifier assembly*8	Click here
	ECM*1	Click here
	ECM*2	Click here
	ECM*3	Click here
Temperature control: No temperature control (MAX COLD or MAX HOT)	Air mix damper control servo motor circuit (for driver side)	Click here
	Air mix damper control servo motor circuit (for front passenger side)	Click here
	Room temperature sensor circuit	Click here
	Ambient temperature sensor circuit	Click here
	Evaporator temperature sensor circuit	Click here
	Solar sensor circuit (for driver side)	Click here
	Solar sensor circuit (for front passenger side)	Click here
	LIN communication circuit	Click here
	Air conditioning amplifier assembly*7	Click here
	Air conditioning amplifier assembly*8	Click here
No air inlet control	Air inlet damper control servo motor circuit	Click here
	LIN communication circuit	Click here
	Air conditioning amplifier assembly*7	Click here
	Air conditioning amplifier assembly*8	Click here
No air flow mode control	Air outlet damper control servo motor circuit	Click here
	LIN communication circuit	Click here
	Air conditioning amplifier assembly*7	Click here
	Air conditioning amplifier assembly*8	Click here
Rear seat temperature cannot be adjusted*4	Rear air mix control servo motor circuit	Click here
	Rear LIN communication circuit	Click here
	Air conditioning amplifier assembly	Click here
Quick heater assembly does not operate*5	PTC heater circuit	Click here
Quick heater assembly does not operate*5	Air conditioning amplifier assembly	Click here
Ion generator does not operate*6	Ion generator circuit	Click here
	LIN communication circuit	Click here
	Air conditioning amplifier assembly	Click here
Diagnostic trouble codes (DTCs) are not recorded. Set mode is cleared when ignition switch is off	Back-up power source circuit	Click here
	Air conditioning amplifier assembly*7	Click here
	Air conditioning amplifier assembly*8	Click here

*1: for 2GR-FE
*2: for 2AR-FE
*3: for 6AR-FSE
*4: for 3 Zone Type
*5: w/ PTC Heater
*6: w/ Ion Generator Sub-assembly
*7: for TMC, TMMR Made
*8: for TMMK Made