AIR CONDITIONING SYSTEM PROBLEM SYMPTOMS TABLE
Tech Tips
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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.
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Inspect the fuses and relays related to this system before inspecting the suspected areas below.
| Symptom | Suspected Area | See page |
|---|---|---|
| All functions of the A/C system do not operate | IG power source circuit | |
| Back-up power source circuit | ||
| LIN communication circuit | ||
| Air conditioning amplifier assembly | ||
| Air flow control: No blower operation | Blower motor circuit | |
| LIN communication circuit | ||
| Air conditioning amplifier assembly | ||
| Air flow control: No blower control | Blower motor circuit | |
| LIN communication circuit | ||
| Air conditioning amplifier assembly | ||
| Air flow control: Insufficient air flow | Blower motor circuit | |
| Air conditioning amplifier assembly | ||
| Temperature control: Cooling effectiveness is poor | Refrigerant shortage check using the Techstream | |
| Refrigerant volume | ||
| Refrigerant pressure | ||
| Compressor with motor assembly | ||
| Air conditioning amplifier assembly | ||
| Temperature control: No cool air comes out | Refrigerant shortage check using the Techstream | |
| Refrigerant volume | ||
| Refrigerant pressure | ||
| Air conditioning pressure sensor circuit | ||
| Air mix damper control servo motor circuit (for driver side) | ||
| Air mix damper control servo motor circuit (for front passenger side) | ||
| Evaporator temperature sensor circuit | ||
| Room temperature sensor circuit | ||
| Ambient temperature sensor circuit | ||
| LIN communication circuit | ||
| Cooler expansion valve | ||
| No. 2 air conditioning radiator damper servo sub-assembly (for driver side) | ||
| No. 1 air conditioning radiator damper servo sub-assembly (for front passenger side) | ||
| Air conditioning harness assembly | ||
| Air conditioning amplifier assembly | ||
| No. 4 engine wire | ||
| Compressor with motor assembly | ||
| Power management control ECU | ||
| Temperature control: No warm air comes out | Air mix damper control servo motor circuit (for driver side) | |
| Air mix damper control servo motor circuit (for front passenger side) | ||
| Evaporator temperature sensor circuit | ||
| Room temperature sensor circuit | ||
| Ambient temperature sensor circuit | ||
| LIN communication circuit | ||
| PTC heater circuit | ||
| No. 2 air conditioning radiator damper servo sub-assembly (for driver side) | ||
| No. 1 air conditioning radiator damper servo sub-assembly (for front passenger side) | ||
| Air conditioning harness assembly | ||
| Heater radiator unit sub-assembly | ||
| Air conditioning amplifier assembly | ||
| Power management control ECU | ||
| ECM | ||
| Temperature control: Output air is warmer or cooler than the set temperature or response is slow | Refrigerant shortage check using the Techstream | |
| Refrigerant volume | ||
| Refrigerant pressure | ||
| Solar sensor circuit (for driver side) | ||
| Solar sensor circuit (for front passenger side) | ||
| Room temperature sensor circuit | ||
| Ambient temperature sensor circuit | ||
| Air mix damper control servo motor circuit (for driver side) | ||
| Air mix damper control servo motor circuit (for front passenger side) | ||
| Air inlet damper control servo motor circuit | ||
| PTC heater circuit | ||
| LIN communication circuit | ||
| No. 2 air conditioning radiator damper servo sub-assembly (for driver side) | ||
| No. 1 air conditioning radiator damper servo sub-assembly (for front passenger side) | ||
| Air conditioning harness assembly | ||
| Heater radiator unit sub-assembly | ||
| Cooler expansion valve | ||
| Air conditioning amplifier assembly | ||
| No. 4 engine wire | ||
| Compressor with motor assembly | ||
| Power management control ECU | ||
| ECM | ||
| Temperature control: No temperature control (only Max. cool or Max. warm) | Air mix damper control servo motor circuit (for driver side) | |
| Air mix damper control servo motor circuit (for front passenger side) | ||
| Room temperature sensor circuit | ||
| Ambient temperature sensor circuit | ||
| Evaporator temperature sensor circuit | ||
| Solar sensor circuit (for driver side) | ||
| Solar sensor circuit (for front passenger side) | ||
| LIN communication circuit | ||
| No. 2 air conditioning radiator damper servo sub-assembly (for driver side) | ||
| No. 1 air conditioning radiator damper servo sub-assembly (for front passenger side) | ||
| Air conditioning harness assembly | ||
| Air conditioning amplifier assembly | ||
| No air inlet control | Air inlet damper control servo motor circuit | |
| LIN communication circuit | ||
| No. 1 blower damper servo sub-assembly | ||
| Air conditioning harness assembly | ||
| Air conditioning amplifier assembly | ||
| No air flow mode control | Air outlet damper control servo motor circuit | |
| LIN communication circuit | ||
| No. 1 air conditioning radiator damper servo sub-assembly (air outlet) | ||
| Air conditioning harness assembly | ||
| Air conditioning amplifier assembly | ||
| Heater performance is low (engine is stopped) | PTC heater circuit | |
| Air conditioning amplifier circuit | ||
| ECO mode switch (eco switch assembly) does not operate normally | ECO switch circuit | |
| Air conditioning amplifier assembly | ||
| Diagnostic trouble codes (DTCs) are not recorded. Set mode is cleared when power switch is off. | Back-up power source circuit | |
| Air conditioning amplifier assembly |