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Diagnostic Trouble Code Chart

AIR CONDITIONING SYSTEM: 

AIR CONDITIONING SYSTEM

DTC Code Detection Item Trouble Area Memory (4)
B1411/11 (1) Room Temperature Sensor Circuit
  1. A/C room temperature sensor
  2. Harness or connector between A/C room temperature sensor and A/ C amplifier
  3. A/C amplifier
 Memorized (8.5 min. 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 (8.5 min. or more)
B1413/13  Evaporator Temperature Sensor Circuit
  1. Air conditioning harness (evaporator temperature sensor)
  2. A/C amplifier
 Memorized (8.5 min. or more)
B1418/18  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
 -
B1421/21 (3) Solar Sensor Circuit (Passenger Side)
  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. A/C amplifier
  5. Main body ECU
 Memorized (8.5 min. or more) (only when circuit is shorted)
B1422/22  Compressor Lock Sensor Circuit
  1. A/C compressor (A/C lock sensor)
  2. Compressor drive belt
  3. Harness or connector between compressor and magnetic clutch (A/C lock sensor)
  4. A/C amplifier
  5. 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. Refrigerant pipe line
  4. A/C amplifier
 -
B1424/24 (3) Solar Sensor Circuit (Driver Side)
  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. A/C amplifier
  5. Main body ECU
 Memorized (8.5 min. or more) (only when circuit is shorted)
B1441/41  Air Mix Damper Control Servo Motor Circuit (Passenger Side)
  1. A/C amplifier
  2. Air conditioning harness
  3. Air mix control servo motor
 Memorized (30 sec.)
B1442/42  Air Inlet Damper Control Servo Motor Circuit
  1. A/C amplifier
  2. Air conditioning harness
  3. Air inlet control servo motor
 Memorized (30 sec.)
B1443/43  Air Outlet Damper Control Servo Motor Circuit
  1. A/C amplifier
  2. Air conditioning harness
  3. Air outlet control servo motor
 Memorized (30 sec.)
B1446/46  Air Mix Damper Control Servo Motor Circuit (Driver Side)
  1. A/C amplifier
  2. Air conditioning harness
  3. Air mix control servo motor
 Memorized (30 sec.)
B1451/51  Compressor Solenoid Circuit
  1. A/C compressor
  2. Harness or connector between A/C amplifier and solenoid of externally changeable compressor
  3. A/C amplifier
 -
B1461/61  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
 -
B1497/97  BUS IC Communication Malfunction
  1. Air conditioning harness
  2. A/C amplifier
 Memorized (10 sec. or more)
B1499/99  Multiplex Communication Circuit CAN communication system Memorized
(1) If the room temperature is approx. -18.6°C (-1.48°F) or lower, DTC B1411/11 may be output even though the system is normal.
(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.
(3) If the check is performed in a dark place, DTC B1421/21 or B1424/24 (solar sensor circuit abnormal) may be output even though the system is normal.
(4) The A/C amplifier memorizes the DTC of the respective malfunction if it has occurred for the period of time indicated in the brackets.
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