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

DESCRIPTION

When the mirror heater switch on the air conditioning control assembly is pressed, the operation signal is transmitted to the air conditioning amplifier assembly through a LIN communication line. When the air conditioning amplifier assembly receives the signal, it turns on the engine room junction block assembly to operate the mirror heater.

WIRING DIAGRAM

A01HPVDE16

INSPECTION PROCEDURE

Note


  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

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

PROCEDURE


  1. PERFORM ACTIVE TEST USING TECHSTREAM


    1. Connect the Techstream to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the Techstream on.

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

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

      Air Conditioner
      Tester Display Test Part Control Range Diagnostic Note
      Defogger Relay (Rear) Mirror heater OFF/ON -
      Result
      Result Proceed to
      Mirror heater operations 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

    CHECK HARNESS AND CONNECTOR (ENGINE ROOM JUNCTION BLOCK ASSEMBLY - OUTER REAR VIEW MIRROR ASSEMBLY RH - BODY GROUND) Click here

    C

    CHECK HARNESS AND CONNECTOR (ENGINE ROOM JUNCTION BLOCK ASSEMBLY - OUTER REAR VIEW MIRROR ASSEMBLY LH - BODY GROUND) Click here

    A

  2. CHECK REAR WINDOW DEFOGGER SYSTEM


    1. Check the rear window defogger operation Click here.

      OK
      The rear window defogger operates normally.

    NG

    GO TO WINDOW DEFOGGER SYSTEM Click here

    OK

  3. CHECK ENGINE ROOM JUNCTION BLOCK ASSEMBLY


    1. Using a voltmeter, check the signal reading of the engine room junction block assembly Click here.

      OK
      Output signal reading is normal.

    NG

    INSPECT ENGINE ROOM JUNCTION BLOCK ASSEMBLY (RESULTS OF SIGNAL READING CHECK) Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (ENGINE ROOM JUNCTION BLOCK ASSEMBLY - POWER SOURCE AND BODY GROUND)


    1. Remove the engine room junction block assembly from the engine room relay block and junction block assembly.

      A01HP4RE04

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A-1 (BATT) - Body ground Always 11 to 14 V
      B-1 (ALT) - Body ground Always 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1F-3 (GND1) - Body ground Always Below 1 Ω
      1G-4 (GND2) - Body ground Always Below 1 Ω
      Text in Illustration
      *a

      Component without engine room junction block assembly

      (Engine Room Relay Block and Junction Block Assembly)

      		 - -

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR ASSEMBLY - ENGINE ROOM JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the 1G connector from the engine room junction block assembly.

    2. Disconnect the J13*1 or J7*2 connector from the outer rear view mirror assembly RH.

    3. Disconnect the K12*1 or K7*2 connector from the outer rear view mirror assembly LH.

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

      Standard Resistance
      Tester Connection Condition Specified Condition

      1G-7 (MHTR) - J13-2 (HR+)*1

      1G-7 (MHTR) - J7-2 (HR+)*2

      		 Always Below 1 Ω

      1G-7 (MHTR) - K12-2 (HR+)*1

      1G-7 (MHTR) - K7-2 (HR+)*2

      		 Always Below 1 Ω

      • *1: w/ Daytime Running Light Control

      • *2: w/o Daytime Running Light Control


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ENGINE ROOM JUNCTION BLOCK ASSEMBLY Click here

  6. CHECK HARNESS AND CONNECTOR (ENGINE ROOM JUNCTION BLOCK ASSEMBLY - OUTER REAR VIEW MIRROR ASSEMBLY RH - BODY GROUND)


    1. Disconnect the 1G connector from the engine room junction block assembly .

    2. Disconnect the J13*1 or J7*2 connector from the outer rear view mirror assembly RH.

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

      Standard Resistance
      Tester Connection Condition Specified Condition

      1G-7 (MHTR) - J13-2 (MR+)*1

      1G-7 (MHTR) - J7-2 (MR+)*2

      		 Always Below 1 Ω

      J13-5 (HR-) - Body Ground*1

      J7-8 (HR-) - Body Ground*2

      		 Always Below 1 Ω

      • *1: w/ Daytime Running Light Control

      • *2: w/o Daytime Running Light Control


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. INSPECT OUTER REAR VIEW MIRROR RH


    1. Remove the outer rear view mirror RH Click here.

    2. Inspect the outer rear view mirror RH Click here.

      OK
      Outer rear view mirror RH is normal.

    NG

    REPLACE OUTER REAR VIEW MIRROR RH Click here

    OK

    REPLACE OUTER REAR VIEW MIRROR ASSEMBLY RH Click here

  8. CHECK HARNESS AND CONNECTOR (ENGINE ROOM JUNCTION BLOCK ASSEMBLY - OUTER REAR VIEW MIRROR ASSEMBLY LH - BODY GROUND)


    1. Disconnect the 1G connector from the engine room junction block assembly.

    2. Disconnect the K12*1 or K7*2 connector from the outer rear view mirror assembly LH.

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

      Standard Resistance
      Tester Connection Condition Specified Condition

      1G-7 (MHTR) - K12-2 (HL+)*1

      1G-7 (MHTR) - K7-2 (HL+)*2

      		 Always Below 1 Ω

      K12-5 (HL-) - Body ground*1

      K7-8 (HL-) - Body ground*2

      		 Always Below 1 Ω

      • *1: w/ Daytime Running Light Control

      • *2: w/o Daytime Running Light Control


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. INSPECT OUTER REAR VIEW MIRROR LH


    1. Remove the outer rear view mirror LH Click here.

    2. Inspect the outer rear view mirror LH Click here.

      OK
      Outer rear view mirror LH is normal.

    NG

    REPLACE OUTER REAR VIEW MIRROR LH Click here

    OK

    REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH Click here