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

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DTC Code
Detection Item
Trouble Area
Memory*2
See page
B1412
Ambient Temperature Sensor Circuit
- Ambient temperature sensor (thermistor assembly)
- Harness or connector between ambient temperature sensor (thermistor assembly) and combination meter assembly
- Combination meter assembly
- Air conditioning amplifier
- CAN communication line
Memorized
(4 sec. or more)
 Click here
B1413
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
Pressure Sensor Circuit
- Air conditioner pressure
sensor
- Harness or connector
between air conditioner
pressure sensor and air
conditioning amplifier
- Air conditioning amplifier
- Expansion valve
(blocked, stuck)
- Condenser (blocked, deterioration of cooling
capacity due to dirt)
- Cooler dryer (moisture in
the 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
B1451
Compressor Solenoid Circuit
- Air conditioning compressor
- Harness and connector between air conditioning amplifier and air conditioning compressor
- Air conditioning amplifier
-
 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
U0155
Lost Communication with Combination Meter
- CAN communication system
- Combination meter assembly
-
 Click here
B1479
Flow Sensor Circuit
- Air conditioning compressor (flow sensor)
- Harness and connector between flow sensor and air conditioning amplifier
- Air conditioning amplifier
Memorized
(4 sec.)*3
(8.5 min. or more)*4
 Click here

HINT:
  1. *1: If the ambient temperature is approximately -52.9°C (-63.22°F) or lower, DTC B1412 may be output even though the system is normal.
  2. *2: The air conditioning amplifier memorizes the DTC of the respective malfunction if it has occurred for the period of time indicated in the brackets.
  3. *3: Circuit is open or shorted.
  4. *4: Sensor is stuck