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

A01GYOXE03

INSPECTION PROCEDURE

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 or ON -
      OK
      Rear magnetic valve operates normally.

    NG

    INSPECT FUSE (RR-IG1-2) Click here

    OK

    REPLACE AIR CONDITIONING AMPLIFIER Click here

  2. INSPECT FUSE (RR-IG1-2)


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

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

      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)

    A01GWMWE03

    1. Disconnect the S90 rear air conditioning harness connector.

    2. Disconnect the S62 rear junction block ECU connector.

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

      Standard voltage
      Tester Connection Condition Specified Condition
      S90-1 (+S) - Body ground Power switch ON (IG) 11 to 14 V

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

      Standard resistance
      Tester Connection Condition Specified Condition
      S90-7 (RMGV) - S62-5 (RMGV) Always Below 1 Ω
      S90-7 (RMGV) - Body ground Always 10 kΩ or higher
      S62-5 (RMGV) - Body ground

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. REPLACE REAR MAGNETIC VALVE


    1. Replace the rear magnetic valve Click here.

      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.

    NG

    REPLACE REAR AIR CONDITIONING HARNESS Click here

    OK

    END (REAR MAGNETIC VALVE IS DEFECTIVE)

  5. REPLACE REAR AIR CONDITIONING HARNESS


    1. 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.

    NG

    REPLACE REAR JUNCTION BLOCK ECU

    OK

    END (REAR AIR CONDITIONING HARNESS IS DEFECTIVE)