Toyota CH-R Service Manual: Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART

AIR CONDITIONING SYSTEM

DTC No.

Detection Item

DTC Detection Condition

Link

B1411

Room Temperature Sensor Circuit

Any of the following conditions is met:

  • Open in cooler thermistor (room temperature sensor) circuit
  • Short in cooler thermistor (room temperature sensor) circuit

B1412

Ambient Temperature Sensor Circuit

When the air conditioning amplifier assembly cannot receive outside temperature sensor data from the combination meter assembly.

B1413

Evaporator Temperature Sensor Circuit

Any of the following conditions is met:

  • Open in No. 1 cooler thermistor (evaporator temperature sensor) circuit
  • Short in No. 1 cooler thermistor (evaporator temperature sensor) circuit

B1423

Pressure Sensor Circuit

  • Open in air conditioner pressure sensor circuit
  • Short in air conditioner pressure sensor circuit
  • Refrigerant pressure on high pressure side is extremely low (195 kPa (2.0 kgf/cm2, 28 psi) or less) or extremely high (2812 kPa (28.7 kgf/cm2, 408 psi) or more)

B1441

Air Mix Damper Control Servo Motor Circuit (Passenger Side)

Air mix damper position sensor value does not change even if air conditioning amplifier assembly operates No. 1 air conditioning radiator damper servo sub-assembly

B1442

Air Inlet Damper Control Servo Motor Circuit

Air inlet damper position sensor value does not change even if air conditioning amplifier assembly operates No. 1 blower damper servo sub-assembly

B1443

Air Outlet Damper Control Servo Motor Circuit

Air outlet damper position sensor value does not change even if air conditioning amplifier assembly operates No. 1 air conditioning radiator damper servo sub-assembly

B1446

Air Mix Damper Control Servo Motor Circuit (Driver Side)

Air mix damper position sensor value does not change even if air conditioning amplifier assembly operates No. 1 air conditioning radiator damper servo sub-assembly

B1451

Compressor Solenoid Circuit

Any of the following conditions is met:

  • Open in compressor solenoid circuit
  • Short in compressor solenoid circuit

B1497

Communication Malfunction (Bus Ic)

Any of the following conditions is met:

  • Error in communication line
  • Open in communication line

B14B2

Lost Communication with Front Panel LIN

Lost communication with air conditioning control assembly

B14B8

Refrigerant Shortage

When following condition is detected in refrigerant shortage check in normal operation:

Amount of refrigerant is insufficient

U0100

Lost Communication with ECM

No communication with ECM

U0131

Lost Communication with Electric Power Steering ECU

No communication with power steering ECU assembly

U0142

Lost Communication with Main Body ECU

No communication with main body ECU (multiplex network body ECU)

U0155

Lost Communication with Combination Meter

No communication with combination meter assembly

    Data List / Active Test
    DATA LIST / ACTIVE TEST DATA LIST NOTICE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when decidi ...

    Refrigerant Shortage (B14B8)
    DESCRIPTION This DTC is stored if the amount of refrigerant in the air conditioning system is insufficient. The air conditioning amplifier assembly receives the ambient temperature signal, refri ...

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