AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System) > DIAGNOSTIC TROUBLE CODE CHART

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DTC Code
Detection Item
Trouble Area
Memory*4
See page
B1411/11*1
Room Temperature Sensor Circuit
- Room temperature sensor (cooler thermistor)
- Harness and connector between room temperature sensor (cooler thermistor) and air conditioning amplifier
- Air conditioning amplifier
Memorized
(4 sec. or more)
 Click here
B1412/12*2
Ambient Temperature Sensor Circuit
- Ambient temperature sensor (thermister assembly)
- Harness and connector between ambient temperature sensor (thermister assembly) and combination meter assembly
- Combination meter assembly
- Air conditioning amplifier
- CAN communication line
Memorized
(4 sec. or more)
 Click here
B1413/13
Evaporator Temperature Sensor Circuit
- Front evaporator temperature sensor (No. 1 cooler thermistor)
- Harness and connector between front evaporator temperature sensor (No. 1 cooler thermistor) and air conditioning amplifier
- Air conditioning amplifier
Memorized
(4 sec. or more)
 Click here
B1423/23
Pressure Sensor Circuit
- Air conditioner pressure sensor
- Harness and connector
- Expansion valve (blocked, stuck)
- Condenser (blocked, deterioration of cooling capacity due to dirt)
- Cooler dryer (moisture in refrigerant cycle cannot be absorbed)
- Cooling fan (condenser cannot be cooled down)
- Air conditioning system (leaks, blocked)
- Refrigerant pipe line
- Air conditioning amplifier
-
 Click here
B1441/41
Air Mix Damper Control Servo Motor Circuit
- Air mix control servo motor
- Air conditioning harness
- Air conditioning amplifier
Memorized
(30 sec. or more)
 Click here
B1442/42
Air Inlet Damper Control Servo Motor Circuit
- Air inlet control servo motor
- Air conditioning harness
- Air conditioning amplifier
Memorized
(30 sec. or more)
 Click here
B1443/43
Air Outlet Damper Control Servo Motor Circuit
- Air outlet control servo motor
- Air conditioning harness
- Air conditioning amplifier
Memorized
(30 sec. or more)
 Click here
B1451/51
Compressor Solenoid Circuit
- Air conditioing compressor
- Harness and connector between air conditioning amplifier and air conditioning compressor
- Air conditioing amplifier
-
 Click here
B1479/79
Flow Sensor Circuit
- Air conditioing compressor (flow sensor)
- Harness and connector between flow sensor and air conditioning amplifier
- Air conditioning amplifier
Memorized
(4 sec.)*5
(8.5 min. or more)*6
 Click here
B1497/97
BUS IC Communication Malfunction
- Air conditioning harness
- Air conditioning amplifier
Memorized
(10 sec. or more)
 Click here
B14A2*3
Driver Side Solar Sensor Short Circuit
- Solar sensor (automatic light control sensor)
- Harness and connector between solar sensor (automatic light control sensor) and air conditioning amplifier
- Harness and connector between solar sensor (automatic light control sensor) and main body ECU
- Main body ECU
- Air conditioning amplifier
Memorized
(4 sec. or more)
 Click here
U0100
Lost Communication with ECM
- CAN communication system
- ECM
-
 Click here
U0131
Lost Communication with Electric Power Steering ECU
- CAN communication system
- Electric power steering ECU
-
 Click here
U0142
Lost Communication with Main Body ECU
- CAN communication system
- Main body ECU
-
 Click here
U0155
Lost Communication with Combination Meter
- CAN communication system
- Combination meter assembly
-
 Click here
  1. *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.
  2. *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. *3: If the check is performed in a dark place, DTC B14A2 (solar sensor circuit abnormal) may be output even though the system is normal.
  4. *4: The air conditioning amplifier stores the DTC of the respective malfunction if it has occurred for the period of time indicated in the brackets.
  5. *5: Circuit is open or shorted.
  6. *6: Sensor is stuck.