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

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DTC Code DTC Name
  Mirror Heater does not Operate with Rear Defogger Switch
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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.

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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

  • The power mirror control system (w/ Memory) uses the CAN communication system. First, confirm that there is no malfunction in the CAN communication system. Refer to the How to Proceed with Troubleshooting procedure.

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  • If the battery voltage is low, the mirror heater function may not operate. When "Operation of Electrical Items Restricted." is not displayed on the multi-information display in the combination meter assembly, check the Data List item "Battery Control Count (Body ECU)".

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

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PROCEDURE


  1. Click here

    CHECK WINDOW DEFOGGER SYSTEM


    1. Check window defogger system operation.

      Click here

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

  2. Click here

    PERFORM ACTIVE TEST 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 / Mirror L or Mirror R / Active Test.

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


      1. 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 engine switch on (IG) and the vehicle stopped.

        • This test turns the mirror heater on or off.

        • Mirror heater operation can be confirmed by touch.



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





      1. 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 engine switch on (IG) and the vehicle stopped.

        • This test turns the mirror heater on or off.

        • Mirror heater operation can be confirmed by touch.



      1. 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

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    INSPECT OUTER MIRROR ACTUATOR ASSEMBLY (DRIVER DOOR) (MIRROR HEATER)


    1. Remove the outer mirror actuator assembly (driver door).

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

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      Result
      Proceed to
      OK
      NG

  4. Click here

    CHECK HARNESS AND CONNECTOR (OUTER MIRROR ACTUATOR ASSEMBLY (DRIVER DOOR) - OUTER MIRROR CONTROL ECU ASSEMBLY (DRIVER DOOR))


    1. Disconnect the S13*1 or R13*2 outer mirror control ECU assembly (driver door) connector.


      • *1: for LHD

      • *2: for RHD

    2. Disconnect the S7*1 or R7*2 outer mirror actuator assembly (driver door) connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      Table 1. for LHD
      Tester Connection Condition Specified Condition
      S13-4 (HTR+) - S7-4 (+) Always Below 1 Ω
      S13-4 (HTR+) or S7-4 (+) - Body ground Always 10 kΩ or higher
      S13-12 (HTR-) - S7-12 (-) Always Below 1 Ω
      S13-12 (HTR-) or S7-12 (-) - Body ground Always 10 kΩ or higher
      Table 2. for RHD
      Tester Connection Condition Specified Condition
      R13-4 (HTR+) - R7-4 (+) Always Below 1 Ω
      R13-4 (HTR+) or R7-4 (+) - Body ground Always 10 kΩ or higher
      R13-12 (HTR-) - R7-12 (-) Always Below 1 Ω
      R13-12 (HTR-) or R7-12 (-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

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

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. Click here

    INSPECT OUTER MIRROR (DRIVER DOOR)


    1. Remove the outer mirror (driver door).

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    2. Inspect the outer mirror (driver door).

      Click here

      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE OUTER MIRROR ACTUATOR ASSEMBLY (DRIVER DOOR)Click here

    • NG

      REPLACE OUTER MIRROR (DRIVER DOOR)Click here

  6. Click here

    INSPECT OUTER MIRROR ACTUATOR ASSEMBLY (FRONT PASSENGER DOOR) (MIRROR HEATER)


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

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

      Click here

      Result
      Proceed to
      OK
      NG

  7. Click here

    CHECK HARNESS AND CONNECTOR (OUTER MIRROR ACTUATOR ASSEMBLY (FRONT PASSENGER DOOR) - OUTER MIRROR CONTROL ECU ASSEMBLY (FRONT PASSENGER DOOR))


    1. Disconnect the R13*1 or S13*2 outer mirror control ECU assembly (front passenger door) connector.


      • *1: for LHD

      • *2: for RHD

    2. Disconnect the R7*1 or S7*2 outer mirror actuator assembly (front passenger door) connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      Table 3. for LHD
      Tester Connection Condition Specified Condition
      R13-4 (HTR+) - R7-4 (+) Always Below 1 Ω
      R13-4 (HTR+) or R7-4 (+) - Body ground Always 10 kΩ or higher
      R13-12 (HTR-) - R7-12 (-) Always Below 1 Ω
      R13-12 (HTR-) or R7-12 (-) - Body ground Always 10 kΩ or higher
      Table 4. for RHD
      Tester Connection Condition Specified Condition
      S13-4 (HTR+) - S7-4 (+) Always Below 1 Ω
      S13-4 (HTR+) or S7-4 (+) - Body ground Always 10 kΩ or higher
      S13-12 (HTR-) - S7-12 (-) Always Below 1 Ω
      S13-12 (HTR-) or S7-12 (-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

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

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  8. Click here

    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 MIRROR ACTUATOR ASSEMBLY (FRONT PASSENGER DOOR)Click here

    • NG

      REPLACE OUTER MIRROR (FRONT PASSENGER DOOR)Click here