PROBLEM SYMPTOMS TABLE
Troubleshooting
| Symptom |
Suspected area |
See page |
| Entire A/C system does not operate |
1. IG power source circuit |
Click here
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| 2. A/C amplifier assembly |
Click here
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| Air Flow Control: No blower operation |
1. Heater relay circuit |
Click here
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| 2. Blower motor circuit |
Click here
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| 3. A/C amplifier assembly |
Click here
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| Air Flow Control: No blower control |
1. Heater relay circuit |
Click here
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| 2. Blower motor circuit |
Click here
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| 3. A/C amplifier assembly |
Click here
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| Air Flow Control: Insufficient air output |
1. Blower motor circuit |
Click here
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| 2. A/C amplifier assembly |
Click here
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| Temperature Control: No cool air comes out |
1. Volume of refrigerant |
Click here
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| 2. Refrigerant pressure |
Click here
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| 3. Pressure switch circuit |
Click here
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| 4. Air mix damper control servomotor circuit (Driver side) |
Click here
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| 5. Air mix damper control servomotor circuit (Passenger side) |
Click here
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| 6. Air mix damper position sensor circuit (Driver side) |
Click here
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| 7. Air mix damper position sensor circuit (Passenger side) |
Click here
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| 8. Room temperature sensor circuit. |
Click here
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| 9. Room humidity sensor circuit |
Click here
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| 10. Ambient temperature sensor circuit |
Click here
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| 11. Evaporator temperature sensor circuit |
Click here
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| 12. w/ Motor compressor assembly |
Click here
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| 13. A/C amplifier assembly |
Click here
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| 14. Multiplex communication circuit |
Click here
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| Temperature Control: No warm air comes out |
1. Heater relay circuit |
Click here
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| 2. Heater water pump circuit |
Click here
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| 3. Air mix damper control servomotor circuit (Driver side) |
Click here
|
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| 4. Air mix damper control servomotor circuit (Passenger side) |
Click here
|
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| 5. Air mix damper position sensor circuit (Driver side) |
Click here
|
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| 6. Air mix damper position sensor circuit (Passenger side) |
Click here
|
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| 7. Room temperature sensor circuit |
Click here
|
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| 8. Room humidity sensor circuit |
Click here
|
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| 9. Ambient temperature sensor circuit |
Click here
|
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| 10. Evaporator temperature sensor circuit |
Click here
|
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| 11. Heater radiator unit sub-assembly |
Click here
|
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| 12.A/C amplifier assembly |
Click here
|
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| 13. Multiplex communication circuit |
Click here
|
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| Temperature Control: Output air is warmer or cooler than set temperature or response is slow |
1. Volume of refrigerant |
Click here
|
| 2. Refrigerant pressure |
Click here
|
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| 3. Air mix damper control servomotor circuit (Driver side) |
Click here
|
|
| 4. Air mix damper control servomotor circuit (Passenger side) |
Click here
|
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| 5. Air mix damper position sensor circuit (Driver side) |
Click here
|
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| 6. Air mix damper position sensor circuit (Passenger side) |
Click here
|
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| 7. Room temperature sensor circuit |
Click here
|
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| 8. Room humidity sensor circuit |
Click here
|
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| 9. Ambient temperature sensor circuit |
Click here
|
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| 10. Solar sensor circuit (Driver side) |
Click here
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| 11. Solar sensor circuit (Passenger side) |
Click here
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| 12. Expansion valve |
Click here
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| 13. Heater radiator unit sub-assembly |
Click here
|
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| 14. A/C amplifier assembly |
Click here
|
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| 15. Multiplex communication circuit |
Click here
|
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| Temperature Control: No temperature control (only Max. cool or Max. warm) |
1. Room temperature sensor circuit |
Click here
|
| 2. Room humidity sensor circuit |
Click here
|
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| 3. Ambient temperature sensor circuit |
Click here
|
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| 4. Air mix damper control servomotor circuit (Driver side) |
Click here
|
|
| 5. Air mix damper control servomotor circuit (Passenger side) |
Click here
|
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| 6. Air mix damper position sensor circuit (Driver side) |
Click here
|
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| 7. Air mix damper position sensor circuit (Passenger side) |
Click here
|
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| 8. A/C amplifier assembly |
Click here
|
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| No air inlet control |
1. Air inlet damper control servomotor circuit |
Click here
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| 2. Air inlet damper position sensor circuit |
Click here
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| 3. A/C amplifier assembly |
Click here
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| No air outlet control |
1. Air outlet damper control servomotor circuit |
Click here
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| 2. Air outlet damper position sensor circuit |
Click here
|
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| 3. A/C amplifier assembly |
Click here
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| Engine idle does not occur, or is continuous |
1. A/C amplifier assembly |
Click here
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| 2. Multiplex communication circuit |
Click here
|
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| Displayed set temperature value does not match with operation of temperature control switch |
1. A/C amplifier assembly |
Click here
|
| Brightness does not change when rheostat volume or light control |
1. Illumination light system |
Click here
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| 2. A/C amplifier assembly |
Click here
|
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| Unable to access the diagnosis mode |
3. A/C amplifier assembly |
Click here
|
| DTC not recorded. Set mode is cleared when IG switch is turned off. |
1. Back-up power source circuit |
Click here
|
| 2. A/C amplifier assembly |
Click here
|
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| Unable to control A/C with the multi-display |
1. Multiplex communication circuit |
Click here
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| 2. Multi-display assembly (w/Navi) |
Click here
|
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| 3. Integration control & panel assembly (w/o Navi) |
Click here
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| 4. A/C amplifier assembly |
Click here
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