AIR CONDITIONING SYSTEM Rear Magnetic Valve Circuit

DESCRIPTION

The rear cooler expansion valve (rear magnetic valve) is controlled by the rear junction block ECU and the air conditioning amplifier via the CAN communication line.

Tech Tips

This circuit uses the CAN communication line. Before performing the inspection, check that the CAN communication system is functioning normally.

WIRING DIAGRAM

A001FLRE09

PROCEDURE


  1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (REAR A/C MAGNETIC VALVE)


    1. Select the Active Test, using the intelligent tester to generate a control command, and then check that the rear magnetic valve operates.

      Air Conditioner
      Tester Display Test Part Control Range Diagnostic Note
      Rear A/C Mag Valv Rear A/C magnetic valve OFF, ON -
      Result
      Result Proceed to
      NG (rear magnetic valve operates normally) A
      NG (checking from the PROBLEM SYMPTOMS TABLE) B
      OK C

    B

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    C

    REPLACE AIR CONDITIONING AMPLIFIER Click here

    A

  2. INSPECT FUSE (RR-IG1-2)


    1. Remove the RR-IG1-2 fuse from the luggage room junction block.

    2. Measure the resistance of the fuse.

      Standard resistance
      Tester Connection Condition Specified Condition
      RR-IG1-2 fuse Always Below 1 Ω

    NG

    REPLACE FUSE

    OK

  3. CHECK HARNESS AND CONNECTOR (REAR AIR CONDITIONING HARNESS - REAR JUNCTION BLOCK ECU)

    A001CVRE01
    *1 Front view of wire harness connector: (to Rear Air Conditioning Harness)
    *2 Front view of wire harness connector: (to Rear Junction Block ECU)

    1. Disconnect the S28 rear air conditioning harness connector.

    2. Disconnect the S62 rear junction block ECU connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      S28-4 (RMGV) - S62-5 (RMGV) Always Below 1 Ω
      S28-4 (RMGV) - Body ground Always 10 kΩ or higher
      S62-5 (RMGV) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. REPLACE REAR MAGNETIC VALVE

    Tech Tips

    Since the rear magnetic valve cannot be inspected while it is removed from the vehicle, replace the rear magnetic valve with a normal one and check that the condition returns to normal.

    OK
    Same problem does not occur.

    OK

    END (REAR MAGNETIC VALVE IS DEFECTIVE)

    NG

  5. CHECK REAR AIR CONDITIONING HARNESS

    Tech Tips

    Replace the rear air conditioning harness with a normal one and check that the condition returns to normal Click here.

    OK
    Same problem does not occur.

    OK

    END (REAR AIR CONDITIONING HARNESS IS DEFECTIVE)

    NG

    REPLACE REAR JUNCTION BLOCK ECU