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

Tip:

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.

Table 1. Air Conditioning System (for Automatic Air Conditioning System)
Symptom	Suspected Area	Link
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	Click here
Air flow control: No blower operation	Blower motor circuit	Click here
	LIN communication circuit	Click here
	Air conditioning amplifier assembly	Click here
Air flow control: No blower control	Blower motor circuit	Click here
	LIN communication 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: Cooling effectiveness is poor	Refrigerant shortage check using the GTS	Click here
	Refrigerant volume	-
	Refrigerant pressure*11	Click here
	Refrigerant pressure*12	Click here
	Cooler expansion valve	Click here
	Compressor assembly with pulley*4	Click here
	Compressor assembly with pulley*5	Click here
	Compressor assembly with pulley*6	Click here
	Compressor assembly with pulley7, 8	Click here
	Compressor assembly with pulley*9	Click here
	Compressor assembly with pulley*10	Click here
	Air conditioning amplifier assembly	Click here
Temperature control: No cool air comes out	Refrigerant shortage check using the GTS	Click here
	Refrigerant volume	-
	Refrigerant pressure*11	Click here
	Refrigerant pressure*12	Click here
	Air conditioning pressure sensor circuit	Click here
	Compressor solenoid circuit	Click here
	Air mix damper control servo motor circuit (for driver side)*1	Click here
	Air mix damper control servo motor circuit (for front passenger side)*1	Click here
	Air mix damper control servo motor circuit*2	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	Click here
	Air mix damper control servo motor (for driver side)*1	Click here
	Air mix damper control servo motor (for front passenger side)*1	Click here
	Air mix damper control servo motor*2	Click here
	Air conditioning harness assembly	Click here
	Air conditioning amplifier assembly	Click here
	ECM*4	Click here
	ECM*5	Click here
	ECM*6	Click here
	ECM*7	Click here
	ECM*8	Click here
	ECM*9	Click here
	ECM*10	Click here
Temperature control: No warm air comes out	Air mix damper control servo motor circuit (for driver side)*1	Click here
	Air mix damper control servo motor circuit (for front passenger side)*1	Click here
	Air mix damper control servo motor circuit*2	Click here
	Evaporator temperature sensor circuit	Click here
	Room temperature sensor circuit	Click here
	Ambient temperature sensor circuit	Click here
	PTC heater circuit*3	Click here
	LIN communication circuit	Click here
	Air mix damper control servo motor (for driver side)*1	Click here
	Air mix damper control servo motor (for front passenger side)*1	Click here
	Air mix damper control servo motor*2	Click here
	Air conditioning harness assembly	Click here
	Air conditioning amplifier assembly	Click here
	ECM*4	Click here
	ECM*5	Click here
	ECM*6	Click here
	ECM*7	Click here
	ECM*8	Click here
	ECM*9	Click here
	ECM*10	Click here
Temperature control: Output air is warmer or cooler than the set temperature or response is slow	Refrigerant shortage check using the GTS	Click here
	Refrigerant volume	-
	Refrigerant pressure*11	Click here
	Refrigerant pressure*12	Click here
	Compressor solenoid circuit	Click here
	Solar sensor circuit (for driver side)*1	Click here
	Solar sensor circuit (for front passenger side)*1	Click here
	Solar sensor circuit*2	Click here
	Room temperature sensor circuit	Click here
	Ambient temperature sensor circuit	Click here
	Air mix damper control servo motor circuit (for driver side)*1	Click here
	Air mix damper control servo motor circuit (for front passenger side)*1	Click here
	Air mix damper control servo motor circuit*2	Click here
	Air inlet damper control servo motor circuit	Click here
	PTC heater circuit*3	Click here
	LIN communication circuit	Click here
	Heater radiator unit sub-assembly	Click here
	Cooler expansion valve	Click here
	Air mix damper control servo motor (for driver side)*1	Click here
	Air mix damper control servo motor (for front passenger side)*1	Click here
	Air mix damper control servo motor*2	Click here
	Air inlet damper control servo motor	Click here
	Air conditioning harness assembly	Click here
	Air conditioning amplifier assembly	Click here
	ECM*4	Click here
	ECM*5	Click here
	ECM*6	Click here
	ECM*7	Click here
	ECM*8	Click here
	ECM*9	Click here
	ECM*10	Click here
Temperature control: No temperature control (only MAX COLD or MAX HOT)	Air mix damper control servo motor circuit (for driver side)*1	Click here
	Air mix damper control servo motor circuit (for front passenger side)*1	Click here
	Air mix damper control servo motor circuit*2	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)*1	Click here
	Solar sensor circuit (for front passenger side)*1	Click here
	Solar sensor circuit*2	Click here
	LIN communication circuit	Click here
	Air mix damper control servo motor (for driver side)*1	Click here
	Air mix damper control servo motor (for front passenger side)*1	Click here
	Air mix damper control servo motor*2	Click here
	Air conditioning harness assembly	Click here
	Air conditioning amplifier assembly	Click here
Temperature control: Output air temperature is different between left and right registers (the set temperature is the same for both)*1	Refrigerant shortage check using the GTS	Click here
	Refrigerant volume	-
	Refrigerant pressure*11	Click here
	Refrigerant pressure*12	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
	Solar sensor circuit (for driver side)	Click here
	Solar sensor circuit (for front passenger side)	Click here
	Air mix damper control servo motor (for driver side)	Click here
	Air mix damper control servo motor (for front passenger side)	Click here
	Air conditioning harness assembly	Click here
	Air conditioning amplifier assembly	Click here
No air inlet control	Air inlet damper control servo motor circuit	Click here
	LIN communication circuit	Click here
	Air inlet damper control servo motor	Click here
	Air conditioning harness assembly	Click here
	Air conditioning amplifier assembly	Click here
No air flow mode control	Air outlet damper control servo motor circuit	Click here
	Air outlet damper control servo motor	Click here
	Air conditioning harness assembly	Click here
	LIN communication circuit	Click here
	Air conditioning amplifier assembly	Click here
Quick heater assembly does not operate*3	PTC heater circuit	Click here
Quick heater assembly does not operate*3	Air conditioning amplifier assembly	Click here
Diagnostic Trouble Codes (DTCs) are not recorded. Set mode is cleared when the ignition switch is turned off	Back-up power source circuit	Click here
	Air conditioning amplifier assembly	Click here

*1: for Dual Type
*2: for Single Type
*3: w/ PTC Heater
*4: for 1WW
*5: for 1ND-TV
*6: for 1NR-FE
*7: for 1ZR-FAE
*8: for 1ZR-FE
*9: for 2ZR-FE
*10: for 8NR-FTS
*11: for HFC-134a (R134a)
*12: for HFO-1234yf (R1234yf)