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

DESCRIPTION

When the rear window defogger switch on the air conditioning control assembly is pressed, the operation signal is transmitted to the air conditioning amplifier assembly via LIN communication. When the air conditioning amplifier assembly receives the signal, it turns on a relay in the engine room junction block assembly to operate the mirror heaters.

WIRING DIAGRAM

A01G4GAE03

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. 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 / Air Conditioner / Active Test.

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

      Air Conditioner
      Tester Display Test Part Control Range Diagnostic Note
      Defogger Relay (Rear) Mirror heater OFF/ON -
      Result
      Result Proceed to
      Mirror heater operation on both mirrors is 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 waveform 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.

      A01G71KE04

    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 installed

      (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 engine room junction block assembly connector.

    2. Disconnect the L7 outer rear view mirror assembly RH connector.

    3. Disconnect the M6 outer rear view mirror assembly LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1G-7 (MHTR) - L7-4 (+) Always Below 1 Ω
      1G-7 (MHTR) - M6-4 (+) Always Below 1 Ω

    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 engine room junction block assembly connector.

    2. Disconnect the L7 outer rear view mirror assembly RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1G-7 (MHTR) - L7-4 (+) Always Below 1 Ω
      L7-12 (-) - Body Ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. INSPECT OUTER MIRROR RH


    1. Remove the outer mirror RH Click here.

    2. Inspect the outer mirror RH Click here.

      OK
      Outer mirror RH is normal.

    NG

    REPLACE OUTER 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 engine room junction block assembly connector.

    2. Disconnect the M6 outer rear view mirror assembly LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1G-7 (MHTR) - M6-4 (+) Always Below 1 Ω
      M6-12 (-) - Body Ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. INSPECT OUTER MIRROR LH


    1. Remove the outer mirror LH Click here.

    2. Inspect the outer mirror LH Click here.

      OK
      Outer mirror LH is normal.

    NG

    REPLACE OUTER MIRROR LH Click here

    OK

    REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH Click here