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

Tech Tips

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

Air conditioning system
Symptom	Suspected Area	See page
No functions of air conditioning control panel operate	LIN communication line	-
	Air conditioning control	Click here
	Air conditioning amplifier	Click here
No functions of air conditioning system operate	A/C NO.2 fuse	-
	Air conditioning control	Click here
	Wire harness or connector	-
Airflow control: No blower control (Blower motor does not operate)	HTR H-fuse	-
	Blower motor circuit	Click here
	Air conditioning amplifier	Click here
	Air conditioning control	Click here
	Wire harness or connector	-
Airflow control: No blower control (Blower motor does not change speed)	Blower motor circuit	Click here
	Air conditioning amplifier	Click here
	Air conditioning control	Click here
Temperature Control: No cool air comes out	Refrigerant volume	Click here
	Refrigerant pressure	Click here
	Air conditioning pressure sensor	Click here
	Air conditioning compressor magnetic clutch circuit	Click here
	Compressor lock sensor circuit	Click here
	Compressor solenoid circuit	Click here
	Air mix damper control servo motor circuit	Click here
	Evaporator temperature sensor circuit	Click here
	Ambient temperature sensor circuit	Click here
	Expansion valve	-
	Air conditioning amplifier	Click here
	Air conditioning control	Click here
	ECM	Click here
	LIN communication line	-
	CAN communication line	Click here
Temperature Control: No warm air comes out	Air mix damper control servo motor circuit	Click here
	Air conditioning harness	-
	Air conditioning amplifier	Click here
	Air conditioning control	Click here
	ECM	Click here
	LIN communication line	-
	CAN communication line	Click here
Temperature Control: Outlet air is warmer or cooler than set temperature or response is slow	Air inlet damper control servo motor circuit	Click here
	Heater radiator	-
	Expansion valve	-
	Air conditioning amplifier	Click here
	Air conditioning control	Click here
	ECM	Click here
	LIN communication line	-
	CAN communication line	Click here
Temperature Control: No temperature control (Only Max. cool or Max. warm)	Air conditioning amplifier	Click here
	Air conditioning control	Click here
	LIN communication line	-
No air inlet control	Air conditioning control	Click here
	Air inlet damper control servo motor circuit	Click here
	Evaporator temperature sensor circuit	Click here
	Air conditioning amplifier	Click here
No air flow mode control	Air outlet damper control servo motor circuit	Click here
No air flow mode control	Air conditioning amplifier	Click here
Engine idle up does not occur, or is continuous	Air conditioning compressor magnetic clutch circuit	Click here
	Compressor lock sensor circuit	Click here
	Compressor solenoid circuit	Click here
	Air conditioning control	Click here
	LIN communication line	-
	Air conditioning amplifier	Click here
	ECM	Click here
Air conditioning indicator blinking	Compressor solenoid circuit	Click here
Air conditioning indicator blinking	Air conditioning amplifier	Click here
Diagnostic trouble codes are not recorded. Set mode is cleared when ignition switch turned off	Air conditioning amplifier	Click here
	Back-up power source circuit	Click here

Air conditioning system (for Rear)
Symptom	Suspected Area	See page
No functions of rear air conditioning panel operate	LIN communication line	-
	Rear air conditioning control	Click here
	Air conditioning amplifier	Click here
No functions of rear air conditioning system operate	A/C NO.2 fuse	-
	Rear air conditioning control	Click here
	Air conditioning amplifier	Click here
	Wire harness or connector	-
Airflow Control: No blower control (Blower motor dose not operate)	RR CLR H-fuse	-
	Rear blower motor circuit	Click here
	Air conditioning amplifier	Click here
	Rear air conditioning control	Click here
	Wire harness or connector	-
Airflow Control: No blower control (Blower motor dose not change speed)	Rear blower motor circuit	Click here
	Air conditioning amplifier	Click here
	Rear air conditioning control	Click here
Temperature Control: No cool air comes out	Refrigerant volume	Click here
	Refrigerant pressure	Click here
	Air conditioning pressure sensor	Click here
	Air conditioning compressor magnetic clutch circuit	Click here
	Rear air mix damper control servo motor circuit	Click here
	Rear evaporator temperature sensor circuit	Click here
	Ambient temperature sensor circuit	Click here
	Expansion valve	-
	LIN communication line	-
	Rear air conditioning control	Click here
	Air conditioning amplifier	Click here
Temperature Control: No warm air comes out	Rear air mix damper control servo motor circuit	Click here
	Rear air conditioning harness	-
	Air conditioning amplifier	Click here
	Rear air conditioning control	Click here
	LIN communication line	-