AIR CONDITIONING SYSTEM(for Automatic Air Conditioning System), Diagnostic DTC:B1451/51

DTC Code DTC Name
B1451/51 Compressor Solenoid Circuit

DESCRIPTION

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

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

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

  • Compressor assembly with pulley (compressor solenoid)

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

  • Air conditioning amplifier assembly

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WIRING DIAGRAM

B0043SKE62

PROCEDURE


  1. INSPECT COMPRESSOR ASSEMBLY WITH PULLEY (COMPRESSOR SOLENOID)


    1. Disconnect the B7*1 or B222*2 compressor assembly with pulley (compressor solenoid) connector.


      • *1: except 1WW

      • *2: for 1WW

    2. B0044I7C05
      *a

      Component without harness connected

      (Compressor Assembly with Pulley (Compressor Solenoid))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (SOL-) - 2 (SOL+) 20°C (68°F) 10.1 to 11.1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE COMPRESSOR ASSEMBLY WITH PULLEY (COMPRESSOR SOLENOID) for 1WW: Click here
    REPLACE COMPRESSOR ASSEMBLY WITH PULLEY (COMPRESSOR SOLENOID) for 1ND-TV: Click here
    REPLACE COMPRESSOR ASSEMBLY WITH PULLEY (COMPRESSOR SOLENOID) for 1NR-FE: Click here
    REPLACE COMPRESSOR ASSEMBLY WITH PULLEY (COMPRESSOR SOLENOID) for 1ZR-FE, 1ZR-FAE: Click here
    REPLACE COMPRESSOR ASSEMBLY WITH PULLEY (COMPRESSOR SOLENOID) for 2ZR-FE: Click here
    REPLACE COMPRESSOR ASSEMBLY WITH PULLEY (COMPRESSOR SOLENOID) for 8NR-FTS: Click here

    OK

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


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B7-1 (SOL-) - Body ground*1 Always Below 1 Ω
      B222-1 (SOL-) - Body ground*2 Always Below 1 Ω

      • *1: except 1WW

      • *2: for 1WW

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the E28 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
      E28-2 (SOL+) - B7-2 (SOL+)*1 Always Below 1 Ω
      E28-2 (SOL+) - B222-2 (SOL+)*2 Always 10 kΩ or higher
      E28-2 (SOL+) - Body ground Always 10 kΩ or higher

      • *1: except 1WW

      • *2: for 1WW

      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