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.

Air Conditioning System (for Front)
Symptom Suspected Area See page
All functions of the A/C system do not operate IG power source circuit

Click here

Back-up power source circuit

Click here

Air conditioning control panel circuit

Click here

A/C amplifier

Click here

Air Flow Control: No blower operation Blower motor circuit

Click here

Air conditioning control panel circuit

Click here

A/C amplifier

Click here

Air Flow Control: No blower control Blower motor circuit

Click here

Air conditioning control panel circuit

Click here

A/C amplifier

Click here

Air Flow Control: Insufficient air flow Blower motor circuit

Click here

A/C amplifier

Click here

Temperature Control: No cool air comes out Refrigerant volume

Click here

Refrigerant pressure

Click here

Air conditioning pressure sensor circuit

Click here

Air conditioning compressor magnetic clutch circuit*1

Click here

Compressor lock sensor circuit*1

Click here

Compressor solenoid circuit*2

Click here

Air mix damper control servo motor circuit (for Driver side)

Click here

Air mix damper control servo motor circuit (for Front passenger side)

Click here

Evaporator temperature sensor circuit

Click here

Room temperature sensor circuit

Click here

Ambient temperature sensor circuit

Click here

Air conditioning control panel circuit

Click here

Expansion valve

Click here

A/C amplifier

Click here

ECM (for 2GR-FE)

Click here

ECM (for 2AZ-FE)

Click here

Temperature Control: No warm air comes out Air mix damper control servo motor circuit (for Driver side)

Click here

Air mix damper control servo motor circuit (for Front passenger side)

Click here

Evaporator temperature sensor circuit

Click here

Room temperature sensor circuit

Click here

Ambient temperature sensor circuit

Click here

Air conditioning control panel circuit

Click here

PTC heater circuit*6

Click here

A/C amplifier

Click here

ECM (for 2GR-FE)

Click here

ECM (for 2AZ-FE)

Click here

Temperature Control: Output air is warmer or cooler than the set temperature or response is slow Refrigerant volume

Click here

Refrigerant pressure

Click here

Air conditioning compressor magnetic clutch circuit*1

Click here

Compressor lock sensor circuit*1

Click here

Compressor solenoid circuit*2

Click here

Solar sensor circuit (for Driver side)

Click here

Solar sensor circuit (for Front passenger side)

Click here

Room temperature sensor circuit

Click here

Ambient temperature sensor circuit

Click here

Air mix damper control servo motor circuit (for Driver side)

Click here

Air mix damper control servo motor circuit (for Front passenger side)

Click here

Air inlet damper control servo motor circuit

Click here

Air conditioning control panel circuit

Click here

PTC heater circuit*6

Click here

Radiator unit sub-assembly

Click here

Expansion valve

Click here

A/C amplifier

Click here

ECM (for 2GR-FE)

Click here

ECM (for 2AZ-FE)

Click here

Temperature control: No temperature control (only Max. cool or Max. warm) Air mix damper control servo motor circuit (for Driver side)

Click here

Air mix damper control servo motor circuit (for Front Passenger side)

Click here

Room temperature sensor circuit

Click here

Ambient temperature sensor circuit

Click here

Evaporator temperature sensor circuit

Click here

Solar sensor circuit (for Driver side)

Click here

Solar sensor circuit (for Front passenger side)

Click here

Air conditioning control panel circuit

Click here

A/C amplifier

Click here

No air inlet control Air inlet damper control servo motor circuit

Click here

Air conditioning control panel circuit

Click here

A/C amplifier

Click here

No air flow mode control Air outlet damper control servo motor circuit

Click here

Air conditioning control panel circuit

Click here

A/C amplifier

Click here

Engine idle up does not occur, or is continuous Air conditioning compressor magnetic clutch circuit*1

Click here

Compressor lock sensor circuit*1

Click here

Compressor solenoid circuit*2

Click here

A/C amplifier

Click here

Blinking of A/C indicator Air conditioning compressor magnetic clutch circuit*1

Click here

Compressor lock sensor circuit*1

Click here

Compressor solenoid circuit*2

Click here

A/C amplifier

Click here

Pollen removal mode does not operate (A/C system is operating normally) Air inlet damper control servo motor circuit

Click here

Air outlet damper control servo motor circuit

Click here

Blower motor circuit

Click here

Air conditioning control panel circuit

Click here

A/C amplifier

Click here

Ion generator assembly does not operate.*3 Ion generator circuit

Click here

Ion generator switch circuit

Click here

Air conditioning control panel circuit

Click here

A/C amplifier

Click here

Ion generator switch assembly indicator does not come on.*3 Wire harness or connector -
Ion generator switch

Click here

A/C amplifier

Click here

Eco switch assembly does not operate normally. ECO switch circuit

Click here

A/C amplifier

Click here

Auto recirculation control function does not operate normally.*5 Smog ventilation sensor circuit (for HC, CO)

Click here

Smog ventilation sensor circuit (for NOx)

Click here

Room temperature sensor circuit

Click here

Ambient temperature sensor circuit

Click here

Air inlet damper control servo motor circuit

Click here

Air conditioning control panel circuit

Click here

A/C amplifier

Click here

Diagnostic trouble codes (DTCs) are not recorded. Set mode is cleared when engine switch is off. Back-up power source circuit

Click here

A/C amplifier

Click here

Air Conditioning System (for Rear)
Symptom Suspected Area See page
All functions of the rear A/C system do not operate IG power source circuit

Click here

Back-up power source circuit

Click here

Rear air conditioning control panel circuit

Click here

A/C amplifier

Click here

Air Flow Control: No blower operation Rear blower motor circuit

Click here

Rear air conditioning control panel circuit

Click here

A/C amplifier

Click here

Air Flow Control: No blower control Rear blower motor circuit

Click here

Rear air conditioning control panel circuit

Click here

A/C amplifier

Click here

Air Flow Control: Insufficient air flow Rear blower motor circuit

Click here

Rear air conditioning control panel circuit

Click here

A/C amplifier

Click here

Temperature Control: No cool air comes out Refrigerant volume

Click here

Refrigerant pressure

Click here

Air conditioning pressure sensor circuit

Click here

Air conditioning compressor magnetic clutch circuit*1

Click here

Compressor lock sensor circuit*1

Click here

Compressor solenoid circuit*2

Click here

Rear air mix damper control servo motor circuit

Click here

Rear evaporator temperature sensor circuit

Click here

Rear room temperature sensor circuit

Click here

Ambient temperature sensor circuit

Click here

Rear air conditioning control panel circuit

Click here

Expansion valve (for Rear air conditioning unit)

Click here

CAN communication system

Click here

A/C amplifier

Click here

ECM (for 2GR-FE)

Click here

ECM (for 2AZ-FE)

Click here

Temperature Control: No warm air comes out Rear air mix damper control servo motor circuit

Click here

Rear evaporator temperature sensor circuit

Click here

Rear room temperature sensor circuit

Click here

Ambient temperature sensor circuit

Click here

Rear air conditioning control panel circuit

Click here

Engine coolant temperature sensor circuit

Click here

Heater radiator unit sub-assembly (for Rear air conditioning unit)

Click here

CAN communication system

Click here

A/C amplifier

Click here

ECM (for 2GR-FE)

Click here

ECM (for 2AZ-FE)

Click here

Temperature Control: Output air is warmer or cooler than the set temperature or response is slow Refrigerant volume

Click here

Refrigerant pressure

Click here

Solar sensor circuit (for Driver side)

Click here

Solar sensor circuit (for Front passenger side)

Click here

Rear room temperature sensor circuit

Click here

Rear evaporator temperature sensor circuit

Click here

Ambient temperature sensor circuit

Click here

Rear air mix damper control servo motor circuit

Click here

Rear air conditioning control panel circuit

Click here

Engine coolant temperature sensor circuit

Click here

Expansion valve (for Rear air conditioning unit)

Click here

Heater radiator unit sub-assembly (for Rear air conditioning unit)

Click here

CAN communication system

Click here

A/C amplifier

Click here

ECM (for 2GR-FE)

Click here

ECM (for 2AZ-FE)

Click here

Temperature Control: No temperature control (only Max. cool or Max. hot) Rear air mix damper control servo motor circuit

Click here

Rear room temperature sensor circuit

Click here

Solar sensor circuit (for Driver side)

Click here

Solar sensor circuit (for Front passenger side)

Click here

Rear evaporator temperature sensor circuit

Click here

Ambient temperature sensor circuit

Click here

Engine coolant temperature sensor circuit

Click here

CAN communication system

Click here

A/C amplifier

Click here

No air flow mode control Rear air outlet damper control servo motor circuit

Click here

Rear air conditioning control panel circuit

Click here

A/C amplifier

Click here

No. 2 ion generator sub-assembly does not operate.*4 Rear ion generator circuit

Click here

Ion generator switch circuit

Click here

Rear air conditioning control panel circuit

Click here

Air conditioning control panel circuit

Click here

A/C amplifier

Click here