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Diagnostic Trouble Code Chart

AIR CONDITIONING SYSTEM 

DIAGNOSTIC TROUBLE CODE CHART

DTC No. Detection Item Trouble Area Memory(4)
B1411/11(1) Room Temperature Sensor Circuit
  1. Room temperature sensor
  2. Harness and connector between 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 and connector between ambient temperature sensor and ECM
  3. ECM
  4. Multiplex communication circuit
  5. 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 and 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 and connector between solar sensor and A/C amplifier
  3. Harness and connector between solar sensor and multiplex network body ECU (cowl side junction block ECU RH)
  4. A/C amplifier
 Memorized (8.5 min. or more) (only when circuit is shorted)
B1422/22 Compressor Lock Sensor Circuit
  1. A/C compressor
  2. A/C compressor drive belt
  3. A/C compressor and magnetic clutch lock sensor
  4. Harness and connector between ECM and A/C compressor
  5. ECM
  6. A/C amplifier
 -
B1423/23 Pressure Switch Circuit
  1. Pressure sensor
  2. Harness and connector between 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 and connector between solar sensor and A/C amplifier
  3. Harness and connector between solar sensor and multiplex network ECU (cowl side junction block ECU RH)
  4. A/C amplifier
 Memorized (8.5 min. or more) (only when circuit is shorted)
B1451/51 Compressor Solenoid Circuit
  1. A/C compressor
  2. Harness and 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 and 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 Multiplex communication system Memorized
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.)
B1445/45 Front Passenger Seat Side Cool Air Bypass Damper Control Servo Motor Circuit
  1. A/C amplifier
  2. Air conditioning harness
  3. Cool air by-pass damper 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.)
(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.
(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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