POWER MIRROR CONTROL SYSTEM Mirror Heater does not Operate with Rear Defogger Switch

DESCRIPTION

When the mirror heater switch (rear window defogger switch) is operated, a mirror heater signal is sent to the air conditioning amplifier assembly via CAN communication. The air conditioning amplifier assembly sends the signal to the outer mirror control ECU assembly via CAN communication. The outer mirror control ECU assembly operates the outer rear view mirror assembly mirror heater based on the received signal.

WIRING DIAGRAM

A01MINQE02

CAUTION / NOTICE / HINT

Note


  • First perform the communication function inspections in How to Proceed with Troubleshooting to confirm that there are no CAN communication malfunctions before troubleshooting this problem.

  • If the auxiliary battery voltage becomes low, mirror heater operation is canceled to prioritize supplying power to the power steering system.

    Click here

PROCEDURE


  1. CHECK WINDOW DEFOGGER SYSTEM


    1. Check the window defogger system operation.

      Click here

      OK
      Window defogger system is normal.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO WINDOW DEFOGGER SYSTEM Click here

    OK

  2. PERFORM ACTIVE TEST USING GTS (MIRROR HEATER FUNCTION)


    1. Using the GTS, perform the Active Test.

      Click here


      Body Electrical > Mirror L > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Mirror Heater Mirror heater operation OFF or ON -

      Body Electrical > Mirror L > Active Test
      Tester Display
      Mirror Heater

      Body Electrical > Mirror R > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Mirror Heater Mirror heater operation OFF or ON -

      Body Electrical > Mirror R > Active Test
      Tester Display
      Mirror Heater
      OK
      Mirror heater operates normally.
      Result
      Result Proceed to
      Mirror heater operation of both mirrors are normal A
      Mirror heater operation of LH side mirror is not normal B
      Mirror heater operation of RH side mirror is not normal C

    A

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    C

    INSPECT OUTER REAR VIEW MIRROR ASSEMBLY RH Click here

    B

  3. INSPECT OUTER REAR VIEW MIRROR ASSEMBLY LH


    1. Remove the outer rear view mirror assembly LH.

      Click here

    2. Inspect the outer rear view mirror assembly LH.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY Click here

    NG

  4. INSPECT LH MIRROR OUTER


    1. Remove the outer mirror LH.

      Click here

    2. Inspect the outer mirror LH.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH Click here

    NG

    REPLACE LH MIRROR OUTER Click here

  5. INSPECT OUTER REAR VIEW MIRROR ASSEMBLY RH


    1. Remove the outer rear view mirror assembly LH.

      Click here

    2. Inspect the outer rear view mirror assembly LH.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY Click here

    NG

  6. INSPECT RH OUTER MIRROR


    1. Remove the outer mirror RH.

      Click here

    2. Inspect the outer mirror RH.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE OUTER REAR VIEW MIRROR ASSEMBLY RH Click here

    NG

    REPLACE RH OUTER MIRROR Click here