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

DESCRIPTION

When the rear defogger switch is operated, the mirror heater signal is sent to the air conditioning amplifier assembly and then to each outer mirror control ECU via CAN communication. Based on the signal, each outer mirror control ECU operates the mirror heater.

WIRING DIAGRAM

A01NG8FE04

INSPECTION PROCEDURE

Note


  • The power mirror control system is a part of the CAN communication system. This system features shared communication wiring that reduces the wiring complexity of the communication lines. The first step in any repair is to confirm the proper operation of the communication system. Proceed with troubleshooting after the communication has been verified (See CAN Communication System, Click here.

  • The mirror heater operation is liked with the defogger system or wiper and washer system. Confirm that these systems are operating normally before starting the inspection.

PROCEDURE


  1. CHECK WINDOW DEFOGGER SYSTEM


    1. Check window defogger system operation Click here.

      OK
      Window defogger system is normal.

    NG

    GO TO WINDOW DEFOGGER SYSTEM Click here

    OK

  2. PERFORM ACTIVE TEST USING INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the intelligent tester on.

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

    5. Perform an Active Test according to the display on the intelligent tester.

      Mirror L / Mirror R
      Tester Display Test Part Control Range Diagnostic Note
      Mirror Heater Mirror heater operation ON / OFF -
      Result
      Result Proceed to
      Mirror heater operation on both mirrors are not normal A
      Mirror heater operation on RH side mirror is not normal B
      Mirror heater operation on LH side mirror is not normal C

    B

    INSPECT OUTER REAR VIEW MIRROR ASSEMBLY RH Click here

    C

    INSPECT OUTER REAR VIEW MIRROR ASSEMBLY LH Click here

    A

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

  3. INSPECT OUTER REAR VIEW MIRROR ASSEMBLY RH


    1. A01NDH1E06
      Text in Illustration
      *1

      Component without harness connected

      (Outer Rear View Mirror Assembly RH)

      Remove the outer rear view mirror assembly RH Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      z3-4 (HTR+) - z3-12 (HTR-) 25°C (77°F) 2.5 to 4.4 Ω

    NG

    REPLACE OUTER REAR VIEW MIRROR ASSEMBLY RH Click here

    OK

    REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (RH SIDE) Click here

  4. INSPECT OUTER REAR VIEW MIRROR ASSEMBLY LH


    1. A01NDH1E07
      Text in Illustration
      *1

      Component without harness connected

      (Outer Rear View Mirror Assembly LH)

      Remove the outer rear view mirror assembly LH Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      z4-4 (HTR+) - z4-12 (HTR-) 25°C (77°F) 2.4 to 4.4 Ω

    NG

    REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH Click here

    OK

    REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (LH SIDE) Click here