AIR CONDITIONING SYSTEM, Diagnostic DTC:B1451/51

DTC Code DTC Name
B1451/51 Compressor Solenoid Circuit

DESCRIPTION

1. except 2GR-FE

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

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

2. for 2GR-FE

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

Based on this signal, the compressor and magnet clutch (compressor solenoid) changes the amount of compressor output.

DTC No. DTC Detection Condition Trouble Area
B1451/51 Open or short in compressor solenoid circuit

  • Compressor assembly with pulley (compressor solenoid)*1

  • Compressor and magnet clutch (compressor solenoid)*2

  • Harness or connector between air conditioning amplifier assembly and compressor assembly with pulley (compressor solenoid)*1

  • Harness or connector between air conditioning amplifier assembly and compressor and magnet clutch (compressor solenoid)*2

  • Air conditioning amplifier assembly

WIRING DIAGRAM

B000M31E35

INSPECTION PROCEDURE

PROCEDURE


  1. CONFIRM MODEL

    Result
    Result Proceed to
    except 2GR-FE A
    for 2GR-FE B

    B

    INSPECT COMPRESSOR AND MAGNET CLUTCH (COMPRESSOR SOLENOID) Click here

    A

  2. INSPECT COMPRESSOR ASSEMBLY WITH PULLEY (COMPRESSOR SOLENOID)


    1. B000NNWE01
      Text in Illustration
      *a

      Component without harness connected

      (Compressor Assembly with Pulley (Compressor Solenoid))

      Disconnect the E74 compressor assembly with pulley (compressor solenoid) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E74-2 (SOL+) - E74-1 (SOL-) 20°C (68°F) 10 to 11 Ω
      Result
      Result Proceed to
      OK A
      NG (for 2AR-FE) B
      NG (for 6AR-FSE) C

    B

    REPLACE COMPRESSOR ASSEMBLY WITH PULLEY (COMPRESSOR SOLENOID) Click here

    C

    REPLACE COMPRESSOR ASSEMBLY WITH PULLEY (COMPRESSOR SOLENOID) Click here

    A

  3. 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
      E74-1 (SOL-) - Body ground Always Below 1 Ω

    NG

    REPLACE COMPRESSOR ASSEMBLY WITH PULLEY (COMPRESSOR SOLENOID) Click here

    OK

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


    1. Disconnect the I77 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
      I77-2 (SOL+) - E74-2 (SOL+) Always Below 1 Ω
      I77-2 (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 (for TMC, TMMR Made)) C
      OK (When troubleshooting according to the DTC (for TMMK Made)) D

    B

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

    C

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    D

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. INSPECT COMPRESSOR AND MAGNET CLUTCH (COMPRESSOR SOLENOID)


    1. B000NNWE01
      Text in Illustration
      *a

      Component without harness connected

      (Compressor and Magnet Clutch (Compressor Solenoid))

      Disconnect the E74 compressor and magnet clutch (compressor solenoid) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E74-2 (SOL+) - E74-1 (SOL-) 20°C (68°F) 10 to 11 Ω

    NG

    REPLACE COMPRESSOR AND MAGNET CLUTCH (COMPRESSOR SOLENOID) Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (COMPRESSOR AND MAGNET CLUTCH (COMPRESSOR SOLENOID) - BODY GROUND)


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E74-1 (SOL-) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK HARNESS AND CONNECTOR (COMPRESSOR AND MAGNET CLUTCH (COMPRESSOR SOLENOID) - AIR CONDITIONING AMPLIFIER ASSEMBLY)


    1. Disconnect the I77 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
      I77-2 (SOL+) - E74-2 (SOL+) Always Below 1 Ω
      I77-2 (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

    B

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

    C

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR