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 temp. sensor) circuit
  • Short in cooler thermistor (room temp. sensor) circuit

B1412

Ambient Temperature Sensor Circuit

When the air conditioning amplifier assembly receives out-of-range 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

Any of the following conditions is met:

  • Open in air conditioner pressure sensor circuit (Only when the outside temperature is 5 °C (41°F) or more)
  • Short in air conditioner pressure sensor circuit (Only when the outside temperature is 5 °C (41°F) or more)
  • for HFC-134a (R134a): Refrigerant pressure on high pressure side is extremely low (176 kPa (1.8 kgf/cm2, 26 psi) or less) or extremely high (3025 kPa (30.8 kgf/cm2, 439 psi) or more) (Only when the outside temperature is 5 °C (41°F) or more)
  • for HFO-1234yf (R1234yf): 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) (Only when the outside temperature is 5 °C (41°F) or more)

B1441

Air Mix Damper Control Servo Motor Circuit (Passenger Side)

Any of the following conditions is met:

  • No. 1 air conditioning radiator damper servo sub-assembly (front passenger side upper air mix) drive terminal is open circuit
  • No. 1 air conditioning radiator damper servo sub-assembly (front passenger side upper air mix) drive terminal is short circuit

B1442

Air Inlet Damper Control Servo Motor Circuit

Any of the following conditions is met:

  • No. 1 blower motor damper servo sub-assembly (fresh/recirculation) drive terminal is open circuit
  • No. 1 blower motor damper servo sub-assembly (fresh/recirculation) drive terminal is short circuit

B1443

Air Outlet Damper Control Servo Motor Circuit

Any of the following conditions is met:

  • No. 2 air conditioning radiator damper servo sub-assembly (mode switching) drive terminal is open circuit
  • No. 2 air conditioning radiator damper servo sub-assembly (mode switching) drive terminal is short circuit

B1446

Air Mix Damper Control Servo Motor Circuit (Driver Side)

Any of the following conditions is met:

  • No. 1 air conditioning radiator damper servo sub-assembly (driver side upper air mix) drive terminal is open circuit
  • No. 1 air conditioning radiator damper servo sub-assembly (driver side upper air mix) drive terminal is short circuit

B1451

Compressor Solenoid Circuit

Any of the following conditions is met:

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

B1453

Air Outlet Damper Cool Control Servo Motor Circuit (Driver Side)

Any of the following conditions is met:

  • No. 1 air conditioning radiator damper servo sub-assembly (driver side lower air mix) drive terminal is open circuit
  • No. 1 air conditioning radiator damper servo sub-assembly (driver side lower air mix) drive terminal is short circuit

B1454

Air Outlet Damper Cool Control Servo Motor Circuit (Passenger Side)

Any of the following conditions is met:

  • No. 1 air conditioning radiator damper servo sub-assembly (front passenger side lower air mix) drive terminal is open circuit
  • No. 1 air conditioning radiator damper servo sub-assembly (front passenger side lower air mix) drive terminal is short circuit

B14B2

Lost Communication with Front Panel LIN

Lost communication with air conditioning control assembly

B14B9

Open in Ion Generator Circuit

Open in ion generator sub-assembly circuit

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

    Dtc Check / Clear
    DTC CHECK / CLEAR DTC CHECK USING TECHSTREAM (a) Connect the Techstream to the DLC3. (b) Turn the ignition switch ON. (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / ...

    Open in Ion Generator Circuit (B14B9)
    DESCRIPTION The ion generator sub-assembly operates when both the ion generator switch and the blower switch are on. The air conditioning amplifier assembly sends a drive signal to the ion genera ...

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