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

for Preparation Click here

HINT:

Use the table below to help determine the cause of problem symptoms. 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.

Air Conditioning System
Symptom	Suspected Area	See page
No functions of A/C panel operate	LIN communication line	-
	Air conditioning control assembly	Click here
	Air conditioning amplifier assembly	Click here
No functions of A/C system operate	Air conditioning control assembly	Click here
	Air conditioning amplifier assembly	Click here
	Harness or connector	-
Airflow Control: No blower control (Blower motor does not operate)	Blower motor circuit	Click here
	Air conditioning amplifier assembly	Click here
	Air conditioning control assembly	Click here
	Harness or connector	-
Airflow Control: No blower control (Blower motor does not change speed)	Blower motor circuit	Click here
	Air conditioning amplifier assembly	Click here
	Air conditioning control assembly	Click here
Temperature Control: No cool air comes out	Refrigerant volume	Click here
	Refrigerant pressure	Click here
	Air conditioning pressure sensor	Click here
	Compressor solenoid circuit	Click here
	Driver side air mix damper control servo motor circuit	Click here
	Passenger side air mix damper control servo motor circuit	Click here
	Evaporator temperature sensor circuit	Click here
	Room temperature sensor circuit	Click here
	Ambient temperature sensor circuit	Click here
	Expansion valve	Click here
	Air conditioning amplifier assembly	Click here
	Air conditioning control assembly	Click here
	ECM (for 2AD-FHV)	Click here
	ECM (for 2AD-FTV [for CCo])	Click here
	ECM (for 2AD-FTV [for DPF])	Click here
	LIN communication system	-
	CAN communication system	Click here
Temperature Control: No warm air comes out	Driver side air mix damper control servo motor circuit	Click here
	Passenger side air mix damper control servo motor circuit	Click here
	Air conditioning harness assembly	-
	Room temperature sensor circuit	Click here
	Ambient temperature sensor circuit	Click here
	PTC heater circuit*	Click here
	Air conditioning amplifier assembly	Click here
	Air conditioning control assembly	Click here
	ECM (for 2AD-FHV)	Click here
	ECM (for 2AD-FTV [for CCo])	Click here
	ECM (for 2AD-FTV [for DPF])	Click here
	LIN communication system	-
	CAN communication system	Click here
Temperature Control: Output air is warmer or cooler than set	Driver side solar sensor circuit	Click here
	Passenger side solar sensor circuit	Click here
	Room temperature sensor circuit	Click here
	Ambient temperature sensor circuit	Click here
	PTC heater circuit	Click here
	Air inlet damper control servo motor circuit	Click here
	Heater radiator	Click here
	Expansion valve	Click here
	Air conditioning amplifier assembly	Click here
	Air conditioning control assembly	Click here
	ECM (for 2AD-FHV)	Click here
	ECM (for 2AD-FTV [for CCo])	Click here
	ECM (for 2AD-FTV [for DPF])	Click here
	LIN communication system	-
	CAN communication system	Click here
Temperature Control: No temperature control (only Max. cool or Max. warm)	Driver side solar sensor circuit	Click here
	Passenger side solar sensor circuit	Click here
	Air conditioning amplifier assembly	Click here
	Air conditioning control assembly	Click here
	LIN communication system	-
No air inlet control	Air conditioning control assembly	Click here
	Air inlet damper control servo motor circuit	Click here
	Evaporator temperature sensor circuit	Click here
	Air conditioning amplifier assembly	Click here
Engine idle up does not occur, or is continuos	Compressor solenoid circuit	Click here
	ECM (for 2AD-FHV)	Click here
	ECM (for 2AD-FTV [for CCo])	Click here
	ECM (for 2AD-FTV [for DPF])	Click here
Diagnostic trouble codes are not recorded. Set mode is cleared when ignition switch turned off	Air conditioning amplifier assembly	Click here
	Back-up power source circuit	Click here

*: w/ PTC Heater