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
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

Air conditioning amplifier assembly

Click here

Air flow control: No blower operation Blower motor circuit

Click here

Air conditioning control panel circuit

Click here

Air conditioning amplifier assembly

Click here

Air flow control: No blower control Blower motor circuit

Click here

Air conditioning control panel circuit

Click here

Air conditioning amplifier assembly

Click here

Air flow control: Insufficient air flow Blower motor circuit

Click here

Air conditioning amplifier assembly

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 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

CAN communication system

Click here

Air conditioning amplifier assembly

Click here

No. 2 engine wire

Click here

Compressor with motor assembly*4

Click here

Compressor with motor assembly*5

Click here

Power management control ECU

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*2

Click here

Exhaust heat recirculation system*3

Click here

CAN communication system

Click here

Air conditioning amplifier assembly

Click here

Power management control ECU

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

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

Radiator unit sub-assembly

Click here

Expansion valve

Click here

Exhaust heat recirculation system*3

Click here

CAN communication system

Click here

Air conditioning amplifier assembly

Click here

No. 2 engine wire

Click here

Compressor with motor assembly*4

Click here

Compressor with motor assembly*5

Click here

Power management control ECU

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

Air conditioning amplifier assembly

Click here

Heater performance is low (engine is stopped)*2 PTC heater circuit

Click here

Air conditioning amplifier assembly

Click here

No air inlet control Air inlet damper control servo motor circuit

Click here

Air conditioning control panel circuit

Click here

Air conditioning amplifier assembly

Click here

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

Click here

Air conditioning control panel circuit

Click here

Air conditioning amplifier assembly

Click here

Windshield fogs up*1 Glass temperature sensor circuit

Click here

Glass surroundings temperature sensor circuit

Click here

Glass humidity sensor circuit

Click here

Air conditioning thermistor assembly

Click here

Air conditioning amplifier assembly

Click here

ECO switch does not operate normally ECO switch circuit

Click here

Air conditioning amplifier assembly

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

Air conditioning amplifier assembly

Click here

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

Click here

Air conditioning amplifier assembly

Click here