AIR CONDITIONING SYSTEM DIAGNOSTIC TROUBLE CODE CHART
Tech Tips
When the air conditioning system functions properly, DTC 00 is output.
| DTC Code | Detection Item | Trouble Area | Memory*3 | See page |
|---|---|---|---|---|
| B1411/11*1 | Room Temperature Sensor Circuit | 1. Room temperature sensor 2. Harness or connector between room temperature sensor and A/C amplifier 3. A/C amplifier |
Memorized (4 sec. or more) |
|
| B1412/12*2 | Ambient Temperature Sensor Circuit | 1. Ambient temperature sensor 2. Harness or connector between ambient temperature sensor and A/C amplifier 3. A/C amplifier |
Memorized (4 sec. or more) |
|
| B1413/13 | Evaporator Temperature Sensor Circuit | 1. Evaporator temperature sensor 2. Air conditioning harness 3. A/C amplifier |
Memorized (4 sec. or more) |
|
| B1418/18*4 | Exhaust Gas Sensor Circuit | 1. Smog ventilation sensor (emission gas sensor) 2. Harness or connector between smog ventilation sensor (emission gas sensor) and A/C amplifier 3. A/C amplifier |
- | |
| B1422/22*5 | Compressor Lock Sensor Circuit | 1. Air conditioning magnetic clutch circuit 2. A/C compressor (A/C lock sensor) 3. Compressor drive belt 4. Harness or connector between A/C compressor and A/C amplifier 5. A/C amplifier 6. CAN communication system |
- | |
| B1423/23 | Pressure Sensor Circuit | 1. A/C pressure sensor 2. Harness or connector between A/C pressure sensor and A/C amplifier 3. A/C amplifier 4. Expansion valve (blocked, stuck) 5. Condenser (blocked, deterioration of cooling capacity due to dirt) 6. Cooler dryer (moisture in the refrigerant cycle cannot be absorbed) 7. Cooling fan system (condenser cannot be cooled down) 8. A/C system (leaks, blocked) |
- | |
| B1441/41 | Air Mix Damper Control Servo Motor Circuit (Passenger Side) | 1. Air mix control servo motor 2. Air conditioning harness 3. A/C amplifier |
Memorized (30 sec. or more) |
|
| B1442/42 | Air Inlet Damper Control Servo Motor Circuit | 1. Air inlet control servo motor 2. Air conditioning harness 3. A/C amplifier |
Memorized (30 sec. or more) |
|
| B1443/43 | Air Outlet Damper Control Servo Motor Circuit | 1. No. 2 air mix control servo motor (air outlet control servo motor) 2. Air conditioning harness 3. A/C amplifier |
Memorized (30 sec. or more) |
|
| B1446/46 | Air Mix Damper Control Servo Motor Circuit (Driver Side) | 1. No. 2 air mix control servo motor (air mix control servo motor) 2. Air conditioning harness 3. A/C amplifier |
Memorized (30 sec. or more) |
|
| B1451/51 | Compressor Solenoid Circuit | 1. A/C compressor (solenoid valve) 2. Harness or connector between A/C amplifier and A/C compressor (solenoid valve) 3. A/C amplifier |
- | |
| B1461/61*4 | Emission Gas NOx Sensor Circuit | 1. Smog ventilation sensor (emission gas NOx sensor) 2. Harness or connector between smog ventilation sensor (emission gas NOx sensor) and A/C amplifier 3. A/C amplifier |
- | |
| B1479/79 | Flow Sensor Circuit | 1. A/C compressor (A/C mass flow sensor) 2. Harness or connector between A/C compressor (A/C mass flow sensor) and A/C amplifier 3. A/C amplifier |
Memorized (4 sec. or more) |
|
| B1497/97 | BUS IC Communication Malfunction | 1. Air conditioning harness 2. A/C amplifier |
Memorized (10 sec. or more) |
|
| B14A2 | Driver Side Solar Sensor Short Circuit | 1. Solar sensor 2. Harness or connector between solar sensor and A/C amplifier 3. Harness or connector between solar sensor and main body ECU 4. Main body ECU 5. A/C amplifier |
Memorized (4 sec. or more) |
|
| B14A3 | Front Passenger Side Solar Sensor Short Circuit | 1. Solar sensor 2. Harness or connector between solar sensor and A/C amplifier 3. Harness or connector between solar sensor and main body ECU 4. Main body ECU 5. A/C amplifier |
Memorized (4 sec. or more) |
|
| U0100 | Lost Communication with ECM | 1. CAN communication system 2. ECM |
- | |
| U0101 | Lost Communication with TCM | 1. CAN communication system 2. TCM |
- | |
| U0131 | Lost Communication with Electric Power Steering ECU | 1. CAN communication system 2. Electric power steering ECU |
- | |
| U0142 | Lost Communication with Main Body ECU | 1. CAN communication system 2. Main body ECU |
- | |
| U0155 | Lost Communication with Combination Meter | 1. CAN communication system 2. Combination meter |
- |
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*1: If the cabin temperature is approx. -18.6°C (-1.48°F) or lower, DTC B1411/11 may be output even though the system is normal.
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*2: If the ambient temperature is approx. -52.9°C (-63.22°F) or lower, DTC B1412/12 may be output even though the system is normal.
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*3: The A/C amplifier stores the DTC of the respective malfunction if it has occurred for the period of time indicated in the brackets.
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*4: w/ Smog Ventilation Sensor
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*5: for 2GR-FE