AIR CONDITIONING SYSTEM(for Manual Air Conditioning System), Diagnostic DTC:B1451

DTC Code DTC Name
B1451 Compressor Solenoid Circuit

DESCRIPTION

In this circuit, the cooler compressor assembly (compressor solenoid) receives a refrigerant compression demand signal from the air conditioning amplifier assembly.

Based on this signal, the cooler compressor assembly (compressor solenoid) changes the amount of compressor output.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory
B1451 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

A0029FXE47
*a Cooler Compressor Assembly (Compressor Solenoid)
*b Air Conditioning Amplifier Assembly

PROCEDURE


  1. INSPECT COOLER COMPRESSOR ASSEMBLY (COMPRESSOR SOLENOID)


    1. A0029Z7C07
      *a

      Component without harness connected

      (Cooler Compressor Assembly (Compressor Solenoid))

      Disconnect the C16 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
      C16-1 (SOL-) - C16-2 (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
      C16-1 (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 F80 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
      C16-2 (SOL+) - F80-2 (SOL+) Always Below 1 Ω
      C16-2 (SOL+) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      NG A
      OK (When troubleshooting according to 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