AIR CONDITIONING SYSTEM, Diagnostic DTC:B1451

DTC Code DTC Name
B1451 Compressor Solenoid Circuit

DESCRIPTION

In this circuit, the compressor receives a refrigerant compression demand signal from the air conditioning amplifier.

Based on this signal, the compressor changes the degree of refrigerant compression.

DTC Code DTC Detection Condition Trouble Area
B1451 Open or short in solenoid of externally changeable compressor circuit

  • Compressor assembly with pulley

  • Harness and connector

  • Air conditioning amplifier

WIRING DIAGRAM

A003HLXE06

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING GTS (REGULATOR CONTROL CURRENT)


    1. Use the Data List to check if the compressor assembly with pulley is functioning properly Click here.

      Air Conditioner
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Regulator Control Current

      Regulator control current /

      Min.: 0 A

      Max.: 0.997 A

      		 Value changes between 0 A and 0.997 A in accordance with compressor assembly with pulley operation -
      OK
      The display is as specified in the normal condition column.
      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

  2. INSPECT COMPRESSOR ASSEMBLY WITH PULLEY


    1. Remove the compressor assembly with pulley Click here.

    2. Inspect the compressor assembly with pulley Click here.


    NG

    REPLACE COMPRESSOR WITH PULLEY ASSEMBLY Click here

    OK

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


    1. Disconnect the H18 air conditioning amplifier connector.

    2. Disconnect the D13 compressor assembly with pulley connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      H18-19 (MGC) - D13-2 Always Below 1 Ω
      H18-19 (MGC) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A003HQEE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Compressor Assembly with Pulley)

      Disconnect the D13 compressor assembly with pulley connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      D13-1 - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here