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

Note:

for 1WW:

After turning the ignition switch off, make sure to wait at least 6 minutes before disconnecting the ECM connector or replacing the ECM.

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.
As the operation of the quick heater may be limited due to battery voltage reduction history in the power steering system, proceed according to "How to Proceed with Troubleshooting".*
Inspect the fuses and relays related to this system before inspecting the suspected areas below.

Table 1. Air Conditioning System
Symptom	Suspected Area	See page
All functions of the A/C system do not operate	Proceed to "IG Power Source Circuit"	Click here
	Proceed to "Heater Control Switch Circuit"	Click here
	Replace air conditioning amplifier assembly	Click here
Air Flow Control: No blower operation	Proceed to "Blower Motor Circuit"	Click here
Air Flow Control: No blower control	Proceed to "Blower Motor Circuit"	Click here
Air Flow Control: Insufficient air flow	Proceed to "Blower Motor Circuit"	Click here
Temperature Control: No cool air comes out	Check volume of refrigerant (for HFC-134a[R134a])	Click here
	Check volume of refrigerant (for HFO-1234yf[R1234yf])	Click here
	Check for refrigerant gas leak (for HFC-134a[R134a])	Click here
	Check for refrigerant gas leak (for HFO-1234yf[R1234yf])	Click here
	Replace cooler expansion valve	Click here
	Replace compressor assembly with pulley (except 1WW)	Click here
	Replace compressor assembly with pulley (for 1WW)	Click here
	Proceed to "Pressure Sensor Circuit"	Click here
	Proceed to "Compressor Solenoid Circuit"	Click here
	Proceed to "Evaporator Temperature Sensor Circuit"	Click here
	Proceed to "Ambient Temperature Sensor Circuit"	Click here
	Check air mix damper control cable sub-assembly	Click here
	Replace air conditioning amplifier assembly	Click here
	Proceed to "CAN Communication System"	Click here
Temperature Control: No warm air comes out	Check air mix damper control cable sub-assembly	Click here
Temperature Control: No warm air comes out	Replace heater radiator unit sub-assembly	Click here
Temperature Control: Output air is warmer or cooler than the set temperature or response is slow	Check volume of refrigerant (for HFC-134a[R134a])	Click here
	Check volume of refrigerant (for HFO-1234yf[R1234yf])	Click here
	Check for refrigerant gas leak (for HFC-134a[R134a])	Click here
	Check for refrigerant gas leak (for HFO-1234yf[R1234yf])	Click here
	Replace cooler expansion valve	Click here
	Replace compressor assembly with pulley (except 1WW)	Click here
	Replace compressor assembly with pulley (for 1WW)	Click here
	Replace heater radiator unit sub-assembly	Click here
	Proceed to "Ambient Temperature Sensor Circuit"	Click here
	Check air mix damper control cable sub-assembly	Click here
No air inlet control	Proceed to "Recirculation Damper Servo Motor Circuit"	Click here
No air inlet control	Check heater control base sub-assembly (air inlet control switch)	Click here
No air flow mode control	Check No. 2 heater control cable sub-assembly	Click here
Engine idle up does not occur or is continuous	Proceed to "Compressor Solenoid Circuit"	Click here
	Replace air conditioning amplifier assembly	Click here
	Replace ECM (for 1ZR-FAE)	Click here
	Replace ECM (for 2ZR-FAE)	Click here
	Replace ECM (for 1WW)	Click here
	Proceed to "CAN Communication System"	Click here
Blinking of air conditioning switch indicator	Proceed to "Heater Control Switch Circuit"	Click here
Blinking of air conditioning switch indicator	Replace air conditioning amplifier assembly	Click here
Diagnostic trouble codes are not stored, and set mode is cleared when ignition switch is off	Replace air conditioning amplifier assembly	Click here
Engine coolant does not warm up quickly when the engine is cold (PTC heater does not operate)*	Proceed to "PTC Heater Circuit"	Click here
	Proceed to "CAN Communication System"	Click here
	Check generator assembly (for 1ZR-FAE)	Click here
	Check generator assembly (for 2ZR-FAE)	Click here
	Check generator assembly (for 1WW)	Click here
	Proceed to "Headlight Signal Circuit" in Lighting System	Click here
	Replace air conditioning amplifier assembly	Click here
Rear window defogger, quick heater and mirror heater do not operate*	Power steering system (battery voltage reduction history)	Click here

*: w/ PTC heater