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.

Front Air Conditioning System (except 5L-E):
Symptom	Suspected Area	See page
Warm air does not flow immediately after engine start with temperature control dial at max. hot	Volume of refrigerant	Click here
	Heater control knob	Click here
	Ambient temperature sensor circuit	Click here
	PTC heater (w/ PTC Heater)	Click here
	Heater switch (w/ Rear Heater)	Click here
	Magnet valve (w/ HOT Gas Heater)	Click here
	Harness or connector	-
	Air conditioning amplifier assembly	Click here
Cabin temperature does not drop	Volume of refrigerant	Click here
	Refrigerant pressure	Click here
	Drive belt tension	Click here
	Air conditioner pressure sensor	Click here
	No. 2 air conditioner pressure sensor (for LHD, 2TR-FE)	Click here
	Cooler compressor assembly (for 1KD-FTV, 2KD-FTV)	Click here
	Magnet clutch assembly (for 1KD-FTV, 2KD-FTV)	Click here
	Compressor assembly with pulley (for 1TR-FE, 2TR-FE)	Click here
	Heater control knob	Click here
	Evaporator temperature sensor	Click here
	Harness or connector	-
	Air conditioning amplifier assembly	Click here
Air flow control: No blower operation	Front blower resistor	Click here
	Front blower motor	Click here
	No. 3 heater control knob	Click here
	Harness or connector	-
	Air conditioning amplifier assembly	Click here
Air flow control: No blower control	Front blower resistor	Click here
	No. 3 heater control knob	Click here
	Harness or connector	-
	Air conditioning amplifier assembly	Click here
Does not operate compressor operate	CAN communication system	Click here
	Volume of refrigerant	Click here
	Refrigerant pressure	Click here
	Heater control knob	Click here
	Air conditioner pressure sensor	Click here
	No. 2 air conditioner pressure sensor (for LHD, 2TR-FE)	Click here
	Evaporator temperature sensor	Click here
	Cooler compressor assembly (for 1KD-FTV, 2KD-FTV)	Click here
	Magnet clutch assembly (for 1KD-FTV, 2KD-FTV)	Click here
	Compressor assembly with pulley (for 1TR-FE, 2TR-FE)	Click here
	ECM (for 1KD-FTV)	Click here
	ECM (for 2KD-FTV)	Click here
	ECM (for 2TR-FE)	Click here
	ECM (for 1TR-FE)	Click here
	Harness or connector	-
	Air conditioning amplifier assembly	Click here

Rear Cooler (except 5L-E) (w/ Rear Cooler):
Symptom	Suspected Area	See page
Air flow control: No blower operation	Rear blower resistor	Click here
	Rear blower motor	Click here
	Cooler control switch	Click here
	Rear blower switch	Click here
	Harness or connector	-
	Air conditioning amplifier assembly	Click here
Air flow control: No blower control	Rear blower resistor	Click here
	Cooler control switch	Click here
	Harness or connector	-
	Air conditioning amplifier assembly	Click here
Temperature control: No cooler air comes out	Rear evaporator temperature sensor	Click here
	No. 2 cooler expansion valve (for Integrated Blower Motor Fan Type)	Click here
	No. 2 cooler expansion valve (for Separate Blower Motor Fan Type)	Click here
	Harness or connector	-
	Air conditioning amplifier assembly	Click here

Rear Heater (except 5L-E) (w/ Rear Heater):
Symptom	Suspected Area	See page
Air flow control: No blower operation	Rear blower resistor	Click here
	Rear blower motor	Click here
	Heater switch	Click here
	Rear blower switch	Click here
	Harness or connector	-
	Air conditioning amplifier assembly	Click here
Air flow control: No blower control	Rear blower resistor	Click here
	Rear blower switch	Click here
	Harness or connector	-
	Air conditioning amplifier assembly	Click here
Temperature control: No warm air comes out	Engine coolant volume (for 1KD-FTV)	Click here
	Engine coolant volume (for 2KD-FTV)	Click here
	Engine coolant volume (for 2TR-FE)	Click here
	Engine coolant volume (for 1TR-FE)	Click here
	Heater switch	Click here
	Rear blower motor	Click here
	Rear blower resistor	Click here
	Harness or connector	-
	Air conditioning amplifier assembly	Click here

Front Air Conditioning System (for 5L-E):
Symptom	Suspected Area	See page
Cabin temperature does not drop	Troubleshooting flowchart	Click here
Air flow control: No blower operation	Blower resistor	Click here
	Blower motor	Click here
	No. 3 heater control knob (front blower switch)	Click here
	Harness or connector	-
	Air conditioning amplifier assembly	Click here
Air flow control: No blower control	Blower resistor	Click here
	No. 3 heater control knob (front blower switch)	Click here
	Harness or connector	-
	Air conditioning amplifier assembly	Click here
Does not operate compressor operate	CAN communication system	Click here
	Volume of refrigerant	Click here
	Refrigerant pressure	Click here
	Heater control knob (air mix damper control switch)	Click here
	Pressure switch	Click here
	Evaporator temperature sensor	Click here
	Cooler compressor assembly	Click here
	Magnet clutch assembly	Click here
	ECM	Click here
	Harness or connector	-
	Air conditioning amplifier assembly	Click here

Rear Cooler (for 5L-E) (w/ Rear Cooler):
Symptom	Suspected Area	See page
Air flow control: No blower operation	Rear blower resistor	Click here
	Rear blower motor	Click here
	Cooler control switch	Click here
	Harness or connector	-
Air flow control: No blower control	Rear blower resistor	Click here
	Cooler control switch	Click here
	Harness or connector	-
Temperature control: No cooler air comes out	Rear evaporator temperature sensor	Click here
	No. 2 cooler expansion valve (for Integrated Blower Motor Fan Type)	Click here
	No. 2 cooler expansion valve (for Separate Blower Motor Fan Type)	Click here
	Harness or connector	-

Rear Heater (for 5L-E) (w/ Rear Heater):
Symptom	Suspected Area	See page
Air flow control: No blower operation	Rear blower resistor	Click here
	Rear blower motor	Click here
	Heater control switch	Click here
	Rear heater blower switch	Click here
	Harness or connector	-
Air flow control: No blower control	Rear blower resistor	Click here
	Rear heater blower switch	Click here
	Harness or connector	-
Temperature control: No warm air comes out	Engine coolant volume	Click here
	Heater switch	Click here
	Rear blower motor	Click here
	Rear blower resistor	Click here
	Harness or connector	-