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

Radio receiver assembly*1

Click here

Radio receiver assembly*2

Click here

Air conditioning amplifier assembly

Click here

CAN communication system*4

Click here

CAN communication system*5

Click here

Air flow control: No blower operation Blower motor circuit

Click here

Air conditioning control panel circuit

Click here

Radio receiver assembly*1

Click here

Radio receiver assembly*2

Click here

Air conditioning amplifier assembly

Click here

CAN communication system*4

Click here

CAN communication system*5

Click here

Air flow control: No blower control Blower motor circuit

Click here

Air conditioning control panel circuit

Click here

Radio receiver assembly*1

Click here

Radio receiver assembly*2

Click here

Air conditioning amplifier assembly

Click here

CAN communication system*4

Click here

CAN communication system*5

Click here

Air flow control: Insufficient air flow Blower motor circuit

Click here

Air conditioning amplifier assembly

Click here

Temperature control: Cooling effectiveness is poor Refrigerant shortage check using the GTS

Click here

Refrigerant volume -
Refrigerant pressure

Click here

Compressor with motor assembly

Click here

Air conditioning amplifier assembly

Click here

Temperature control: No cool air comes out Refrigerant shortage check using the GTS

Click here

Refrigerant volume -
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

Cooler expansion valve

Click here

No. 4 engine wire

Click here

Compressor with motor assembly

Click here

Air conditioning control panel circuit

Click here

Radio receiver assembly*1

Click here

Radio receiver assembly*2

Click here

Air conditioning amplifier assembly

Click here

Hybrid vehicle control ECU assembly

Click here

CAN communication system*4

Click here

CAN communication system*5

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

PTC heater circuit

Click here

Heater radiator unit sub-assembly

Click here

Air conditioning control panel circuit

Click here

Radio receiver assembly*1

Click here

Radio receiver assembly*2

Click here

Air conditioning amplifier assembly

Click here

Hybrid vehicle control ECU assembly

Click here

CAN communication system*4

Click here

CAN communication system*5

Click here

Temperature control: Output air is warmer or cooler than the set temperature or response is slow Refrigerant shortage check using the GTS

Click here

Refrigerant volume -
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

PTC heater circuit

Click here

Heater radiator unit sub-assembly

Click here

Cooler expansion valve

Click here

No. 4 engine wire

Click here

Compressor with motor assembly

Click here

Air conditioning control panel circuit

Click here

Radio receiver assembly*1

Click here

Radio receiver assembly*2

Click here

Air conditioning amplifier assembly

Click here

Hybrid vehicle control ECU assembly

Click here

CAN communication system*4

Click here

CAN communication system*5

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

Radio receiver assembly*1

Click here

Radio receiver assembly*2

Click here

Air conditioning amplifier assembly

Click here

CAN communication system*4

Click here

CAN communication system*5

Click here

Temperature control: Output air temperature is different between left and right resisters (the set temperature is the same for both) Refrigerant shortage check using the GTS

Click here

Refrigerant volume -
Refrigerant pressure

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

Solar sensor circuit (for driver side)

Click here

Solar sensor circuit (for front passenger side)

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

Radio receiver assembly*1

Click here

Radio receiver assembly*2

Click here

Air conditioning amplifier assembly

Click here

CAN communication system*4

Click here

CAN communication system*5

Click here

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

Click here

Air conditioning control panel circuit

Click here

Radio receiver assembly*1

Click here

Radio receiver assembly*2

Click here

Air conditioning amplifier assembly

Click here

CAN communication system*4

Click here

CAN communication system5

Click here

Auto recirculation control function does not operate normally. 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

Radio receiver assembly*1

Click here

Radio receiver assembly*2

Click here

Air conditioning amplifier assembly

Click here

CAN communication system*4

Click here

CAN communication system*5

Click here

Rear seat temperature cannot be adjusted*3 Rear air mix control servo motor circuit

Click here

Rear LIN communication circuit

Click here

Air conditioning amplifier assembly

Click here

Ion generator assembly does not operate Ion generator circuit

Click here

Air conditioning control panel circuit

Click here

Radio receiver assembly*1

Click here

Radio receiver assembly*2

Click here

Air conditioning amplifier assembly

Click here

CAN communication system*4

Click here

CAN communication system*5

Click here

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

Click here

Air conditioning amplifier assembly

Click here

ECO mode switch (integration control and panel assembly) does not operate normally ECO switch circuit

Click here

Air conditioning amplifier assembly

Click here

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

Click here

Air conditioning amplifier assembly

Click here