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

DESCRIPTION

The mirror heater operation is linked with the defogger system or wiper and washer system.

Defogger linked function:

When the window defogger switch, which is built into the multi-display assembly*1 or integration control and panel*2, is operated, the operation signals are transmitted to the A/C amplifier assembly through AVC-LAN and BEAN. When the A/C amplifier assembly receives the signals, it turns on the MIR HTR relay to operate the mirror heater. When the defogger switch is turned off, the mirror heater also turns off simultaneously.

Wiper linked function:


Note


  • The power mirror control system is a part of the multiplex 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 Multiplex Communication System, Click here.

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


WIRING DIAGRAM

A0161JHE03

INSPECTION PROCEDURE

Note


  • The power mirror control system is a part of the multiplex 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 Multiplex Communication System, Click here.

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

PROCEDURE


  1. CHECK MULTIPLEX COMMUNICATION SYSTEM


    1. Use the intelligent tester to check if the multiplex communication system is functioning normally Click here.


    NG
    OK
  2. PERFORM ACTIVE TEST USING INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Enter the following menus: Body / Air Conditioner / Active Test.

    4. Perform an Active Test according to the display on the tester.

      Tester Display Test Part Control Range Diagnostic Note
      Mirror Heater Mirror heater operation OFF / ON -
      OK
      Mirrors become warm.

    NG
    OK
  3. REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY


    1. Replace the air conditioning amplifier assembly Click here


    NEXT
  4. CONFIRM MIRROR HEATER OPERATION


    1. Turn the engine switch on (IG).

    2. Check mirror heater operation.

      Result
      Result Proceed to
      Mirrors become warm A
      Mirrors do not operate linked with automatic wiper B
      Mirrors do not operate linked with windshield wiper switch assembly C

    B
    C
    A
  5. PERFORM ACTIVE TEST USING INTELLIGENT TESTER


    1. Select the Active Test, use the intelligent tester to issue a control command, and then check heater mirror relay operation.

    2. Check that operation sound of the heater mirror relay can be heard.

      OK
      Operation sound of the heater mirror relay can be heard.

    NG
    OK
  6. INSPECT HEATER MIRROR RELAY


    1. A0162KB

      Remove the heater mirror relay.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 - 5 When battery voltage is applied to terminals 1 and 2 Below 1 Ω
      3 - 5 When battery voltage is not applied to terminals 1 and 2 10 kΩ or higher

    NG
    OK
  7. CHECK HARNESS AND CONNECTOR (HEATER MIRROR RELAY - BATTERY)


    1. A016047E02

      Measure the voltage according to the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      Q52-5 - Body ground Always 11 to 14 V

    NG
    OK
  8. CHECK HARNESS AND CONNECTOR (HEATER MIRROR RELAY - OUTER REAR VIEW MIRROR ASSEMBLY)


    1. Disconnect the L14 and M15 connectors.

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

      Standard Resistance
      Outer Rear View Mirror Assembly LH
      Tester Connection Condition Specified Condition
      Q52-3 - M15-3 (+) Always Below 1 Ω
      Q52-3 - Body ground Always 10 kΩ or higher
      M15-9 (-) - Body ground Always Below 1 Ω
      Outer Rear View Mirror Assembly RH
      Tester Connection Condition Specified Condition
      Q52-3 - L14-3 (+) Always Below 1 Ω
      Q52-3 - Body ground Always 10 kΩ or higher
      L14-9 (-) - Body ground Always Below 1 Ω

    NG
    OK
  9. INSPECT HEATER MIRROR RELAY


    1. A0162KB

      Remove the heater mirror relay.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 - 5 When battery voltage is applied to terminals 1 and 2 Below 1 Ω
      3 - 5 When battery voltage is not applied to terminals 1 and 2 10 kΩ or higher

    NG
    OK
  10. CHECK HARNESS AND CONNECTOR (HEATER MIRROR RELAY - BATTERY)


    1. A016047E02

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      Q52-1 - Body ground Engine switch on (IG) 11 to 14 V

    NG
    OK
  11. CHECK HARNESS AND CONNECTOR (HEATER MIRROR RELAY - A/C AMPLIFIER ASSEMBLY)


    1. Disconnect the J58 connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Q52-2 - J58-2 (MHTR) Always Below 1 Ω
      Q52-2 - Body ground Always 10 kΩ or higher

    NG
    OK