AIR CONDITIONING SYSTEM, Diagnostic DTC:B1451

DTC Code DTC Name
B1451 Compressor Solenoid Circuit

DESCRIPTION

In this circuit, the compressor assembly with pulley receives a refrigerant compression demand signal from the air conditioning amplifier assembly. Based on this signal, the compressor assembly with pulley changes the amount of compressor output.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory
B1451 Compressor Solenoid Circuit

  • Diagnosis condition: During compressor assembly with pulley operation

  • Malfunction status: Open or short in compressor solenoid circuit

  • Detection time: Continuously for 30 seconds or more

  • Compressor assembly with pulley

  • Harness or connector

  • Air conditioning amplifier assembly

 Memorized

WIRING DIAGRAM

B000YJBE17
*a Compressor Assembly with Pulley
*b Air Conditioning Amplifier Assembly

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS (COMPRESSOR SOLENOID)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Air Conditioner / Active Test.

    5. Check the operation by referring to the table below.


      Body Electrical > Air Conditioner > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Regulator Control Current Solenoid valve control current

      Min.: 0 A

      Max.: 0.997 A

      		 Solenoid valve control current Compressor system malfunction

      Body Electrical > Air Conditioner > Data List
      Tester Display
      Regulator Control Current
      OK
      The display is as specified in the normal condition column.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    NG

  2. INSPECT COMPRESSOR ASSEMBLY WITH PULLEY


    1. Remove the compressor assembly with pulley.

      Click here

    2. Inspect the compressor assembly with pulley.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE COMPRESSOR ASSEMBLY WITH PULLEY Click here

    OK

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


    1. Disconnect the G75 compressor assembly with pulley connector.

    2. Disconnect the P58 air conditioning amplifier assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G75-2 (SOL+) - P58-3 (SOL+) Always Below 1 Ω
      G75-2 (SOL-) - body ground Always Below 1 Ω
      G75-2 (SOL+) or P58-3 (SOL+) - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR