POWER MIRROR CONTROL SYSTEM(w/ Memory) Mirror Heater does not Operate with Rear Defogger Switch

DESCRIPTION

When the mirror heater switch (rear window defogger switch) is operated, the mirror heater signal is sent to the air conditioning amplifier assembly and then to each outer mirror control ECU assembly via CAN communication. Based on this signal, the outer mirror control ECU assemblies operate the mirror heaters.

WIRING DIAGRAM

A0029FDE07

CAUTION / NOTICE / HINT

Note


  • The power mirror control system (w/ Memory) uses the CAN communication system and LIN communication system. Inspect the communication functions by following How to Proceed with Troubleshooting. Troubleshoot the power mirror control system (w/ Memory) after confirming that the communication systems are functioning properly.

    Click here

  • If the battery voltage is low, the mirror heater function may not operate. In this case, check the Data List item "Battery Control Count (Body ECU)".

    Click here

  • Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.

  • As the door control battery is installed between the vehicle battery and main body ECU (multiplex network body ECU), first perform the inspections in On-Vehicle Inspection to confirm that there are no malfunctions in the power source circuit for the main body ECU (multiplex network body ECU) before performing this troubleshooting procedure.*

    Click here


    • *: for LHD

PROCEDURE


  1. CHECK WINDOW DEFOGGER SYSTEM


    1. Check 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


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Mirror L or Mirror R / Active Test.

    5. Perform an Active Test according to the display on the GTS.


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

      • Operate with the ignition switch ON and the vehicle stopped.

      • This test turns the mirror heater on or off.

      • Mirror heater operation can be confirmed by touch.

      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

      • Operate with the ignition switch ON and the vehicle stopped.

      • This test turns the mirror heater on or off.

      • Mirror heater operation can be confirmed by touch.

      Body Electrical > Mirror R > Active Test
      Tester Display
      Mirror Heater
      Result
      Result Proceed to
      Mirror heater operation on both mirrors is normal A
      Mirror heater operation on driver door mirror is not normal B
      Mirror heater operation on front passenger door mirror is not normal C

    A

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    C

    INSPECT OUTER REAR VIEW MIRROR ASSEMBLY (FRONT PASSENGER DOOR) (MIRROR HEATER) Click here

    B

  3. INSPECT OUTER REAR VIEW MIRROR ASSEMBLY (DRIVER DOOR) (MIRROR HEATER)


    1. Remove the outer rear view mirror assembly (driver door).

      Click here

    2. Remove the outer rear view mirror assembly (driver door) (mirror heater).

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (DRIVER DOOR) Click here

    NG

  4. INSPECT OUTER MIRROR (DRIVER DOOR)


    1. Remove the outer mirror (driver door).

      Click here

    2. Inspect the outer mirror (driver door).

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE OUTER REAR VIEW MIRROR ASSEMBLY (DRIVER DOOR) Click here

    NG

    REPLACE OUTER MIRROR (DRIVER DOOR) Click here

  5. INSPECT OUTER REAR VIEW MIRROR ASSEMBLY (FRONT PASSENGER DOOR) (MIRROR HEATER)


    1. Remove the outer rear view mirror assembly (front passenger door).

      Click here

    2. Remove the outer rear view mirror assembly (front passenger door) (mirror heater).

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (FRONT PASSENGER DOOR) Click here

    NG

  6. INSPECT OUTER MIRROR (FRONT PASSENGER DOOR)


    1. Remove the outer mirror (front passenger door).

      Click here

    2. Inspect the outer mirror (front passenger door).

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE OUTER REAR VIEW MIRROR ASSEMBLY (FRONT PASSENGER DOOR) Click here

    NG

    REPLACE OUTER MIRROR (FRONT PASSENGER DOOR) Click here