AIR CONDITIONING SYSTEM, Diagnostic DTC:B1451/51

DTC Code DTC Name
B1451/51 Compressor Solenoid Circuit

DESCRIPTION


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

  • Compressor assembly with pulley

  • Harness or connector

  • Air conditioning amplifier assembly

 - -

Tech Tips

The air conditioning amplifier assembly stores the DTC of the respective malfunction if it has occurred for the period of time indicated in the brackets.

WIRING DIAGRAM

B005BBKE54
*a Compressor Assembly with Pulley
*b Air Conditioning Amplifier Assembly

CAUTION / NOTICE / HINT

Note

When the battery is disconnected or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization.

Click here

PROCEDURE


  1. READ VALUE USING GTS


    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 / Data List.

    5. Check the value(s) 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

      		 Value changes between 0 A and 0.997 A in accordance with solenoid valve operation -

      Body Electrical > Air Conditioner > Data List
      Tester Display
      Regulator Control Current
      OK
      The display is as specified in the normal condition column.
      Result
      Result Proceed to
      OK (When troubleshooting according to Problem Symptoms Table) A
      OK (When troubleshooting according to the DTC) B
      NG C

    A

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

    B

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    C

  2. INSPECT COMPRESSOR ASSEMBLY WITH PULLEY


    1. Remove the compressor assembly with pulley.

      for 8AR-FTS:

      Click here

      for 3ZR-FAE:

      Click here

    2. Inspect the compressor assembly with pulley.

      for 8AR-FTS:

      Click here

      for 3ZR-FAE:

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE COMPRESSOR ASSEMBLY WITH PULLEY for 8AR-FTS: REPLACE COMPRESSOR ASSEMBLY WITH PULLEY Click here
    REPLACE COMPRESSOR ASSEMBLY WITH PULLEY for 3ZR-FAE: REPLACE COMPRESSOR ASSEMBLY WITH PULLEY Click here

    OK

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


    1. B0058OJC03
      *a

      Front view of wire harness connector

      (to Compressor Assembly with Pulley)

      Disconnect the 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
      C13-1 (SOL-) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the I50 air conditioning amplifier assembly connector.

    2. Disconnect the C13 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
      I50-2 (SOL+) - C13-2 (SOL+) Always Below 1 Ω
      I50-2 (SOL+) or C13-2 (SOL+) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (When troubleshooting according to Problem Symptoms Table) A
      OK (When troubleshooting according to the DTC) B
      NG C

    A

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

    B

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR