AIR CONDITIONING SYSTEM(for Manual 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.

for Front Air Conditioning
Symptom	Suspected Area	Link
All functions of air conditioning system do not operate.	Harness or connector	-
	Air conditioning control assembly	Click here
	Air conditioning amplifier assembly	Click here
Air flow control: No blower operation. (blower motor does not operate)	Harness or connector	-
	Blower resistor	Click here
	Air conditioning control assembly	Click here
	Blower with fan motor sub-assembly	Click here
Air flow control: No blower control. (blower motor does not change speed)	Harness or connector	-
	Blower resistor	Click here
	Air conditioning control assembly	Click here
Air flow control: Insufficient air comes out.	Harness or connector	-
	Blower resistor	Click here
	Air conditioning control assembly	Click here
	Blower with fan motor sub-assembly	Click here
Temperature control: Cooling effectiveness is poor.	Refrigerant volume	Click here
	Refrigerant pressure	Click here
	Check refrigerant line	Click here
	No. 1 cooler expansion valve	Click here
	Compressor assembly with magnet clutch (for 1GR-FE)	Click here
	Compressor assembly with magnet clutch (for 1GD-FTV, 2GD-FTV)	Click here
	Compressor assembly with magnet clutch (for 2KD-FTV)	Click here
	Compressor assembly with magnet clutch (for 2TR-FE)	Click here
	Magnet clutch assembly (for 1GR-FE)	Click here
	Magnet clutch assembly (for 1GD-FTV, 2GD-FTV)	Click here
	Magnet clutch assembly (for 2KD-FTV)	Click here
	Magnet clutch assembly (for 2TR-FE)	Click here
	Air conditioning amplifier assembly	Click here
Temperature control: No cool air comes out.*	Refrigerant volume	Click here
	Refrigerant pressure	Click here
	Check refrigerant line	Click here
	Air conditioner pressure switch	Click here
	Harness or connector	-
	Evaporator temperature sensor circuit (w/ PTC Heater)	Click here
	No. 1 cooler thermistor (front evaporator temperature sensor) (w/o PTC Heater)	Click here
	Air conditioning compressor magnetic clutch circuit	Click here
	Air conditioning control assembly	Click here
	Compressor assembly with magnet clutch (for 1GR-FE)	Click here
	Compressor assembly with magnet clutch (for 1GD-FTV, 2GD-FTV)	Click here
	Compressor assembly with magnet clutch (for 2KD-FTV)	Click here
	Compressor assembly with magnet clutch (for 2TR-FE)	Click here
	Air mix damper control sub-assembly	Click here
	Defroster damper control sub-assembly	Click here
	Air conditioning amplifier assembly	Click here
	ECM (for 1GR-FE)	Click here
	ECM (for 2TR-FE)	Click here
	ECM (for 1GD-FTV)	Click here
	ECM (for 2GD-FTV)	Click here
	ECM (for 1KD-FTV)	Click here
	ECM (for 2KD-FTV)	Click here
	No. 1 cooler expansion valve	Click here
	No. 1 cooler evaporator	Click here
Temperature control: No warm air comes out.	Harness or connector	-
	Ambient temperature sensor circuit (w/ PTC Heater)	Click here
	Air conditioning control assembly	Click here
	Air mix damper control sub-assembly	Click here
	Defroster damper control sub-assembly	Click here
	Heater radiator unit sub-assembly	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
	Check refrigerant line	Click here
	Air conditioner pressure switch	Click here
	Harness or connector	-
	Evaporator temperature sensor circuit (w/ PTC Heater)	Click here
	No. 1 cooler thermistor (front evaporator temperature sensor) (w/o PTC Heater)	Click here
	Air conditioning compressor magnetic clutch circuit	Click here
	Air conditioning control assembly	Click here
	Air mix damper control sub-assembly	Click here
	Defroster damper control sub-assembly	Click here
	Air conditioning amplifier assembly	Click here
	ECM (for 1GR-FE)	Click here
	ECM (for 2TR-FE)	Click here
	ECM (for 1GD-FTV)	Click here
	ECM (for 2GD-FTV)	Click here
	ECM (for 1KD-FTV)	Click here
	ECM (for 2KD-FTV)	Click here
	No. 1 cooler expansion valve	Click here
	No. 1 cooler evaporator	Click here
Temperature control: No temperature control.	Air conditioning control assembly	Click here
No air inlet control.	Air conditioning control assembly	Click here
Engine coolant does not warm up quickly when engine is cold (PTC heater does not operate) (w/ PTC Heater).	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	Proceed to "PTC Heater Circuit"	Click here
Viscous with magnet clutch heater assembly does not operate when heater switch assembly is pushed while engine is cold (w/ Viscous Heater).	CAN communication system (for LHD)	Click here
	Proceed to "Viscous Heater with Magnet Clutch Circuit"	Click here
Engine idle up does not occur when idle up switch is pushed while engine is cold (w/ Idle Up Switch).	CAN communication system (for RHD)	Click here
	Proceed to "Idle Up Switch Circuit"	Click here
ECO mode switch does not operate.	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	Meter/gauge system	Click here
	Air conditioning amplifier assembly	Click here
Diagnostic trouble codes (DTCs) are not recorded. Set mode is cleared when ignition switch is off.	Air conditioning amplifier assembly	Click here

*: Check that the radiator, condenser and/or intercooler is not blocked with leaves, dirt or insects, and clean them if necessary. Also check the hose connection for the installation condition, corrosion, etc.

for 1GR-FE: Click here
for 1GD-FTV: Click here
for 2GD-FTV: Click here
for 2KD-FTV: Click here
for 1TR-FE: Click here
for 2TR-FE: Click here