AIR CONDITIONING SYSTEM, Diagnostic DTC:B1451/51

DTC Code DTC Name
B1451/51 Compressor Solenoid Circuit

DESCRIPTION


DTC No. Detection Item DTC Detection Condition Trouble Area Memory
B1451/51 Compressor Solenoid Circuit Open or short in compressor solenoid circuit

  • Cooler compressor assembly (compressor solenoid)

  • Harness or connector between air conditioning amplifier assembly and cooler compressor assembly (compressor solenoid)

  • Air conditioning amplifier assembly

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WIRING DIAGRAM

B0072TUE56
*a Cooler Compressor Assembly (Compressor Solenoid)
*b Air Conditioning Amplifier Assembly

PROCEDURE


  1. INSPECT COOLER COMPRESSOR ASSEMBLY (COMPRESSOR SOLENOID)


    1. B0073G4C15
      *a

      Component without harness connected

      (Cooler Compressor Assembly (Compressor Solenoid))

      Disconnect the F55 cooler compressor assembly (compressor solenoid) connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (SOL-) - 2 (SOL+) 25°C (77°F) 10.1 to 11.1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE COOLER COMPRESSOR ASSEMBLY (COMPRESSOR SOLENOID) Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (COOLER COMPRESSOR ASSEMBLY (COMPRESSOR SOLENOID) - BODY GROUND)


    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      F55-1 (SOL-) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (COOLER COMPRESSOR ASSEMBLY (COMPRESSOR SOLENOID) - AIR CONDITIONING AMPLIFIER ASSEMBLY)


    1. Disconnect the O9 air conditioning amplifier assembly connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      F55-2 (SOL+) - O9-4 (SOL+) Always Below 1 Ω
      F55-2 (SOL+) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      NG A
      OK (When troubleshooting according to the Problem Symptoms Table) B
      OK (When troubleshooting according to the DTC) C

    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    B

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    C

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here