LIGHTING SYSTEM Shift Illumination Circuit

DESCRIPTION

The shift illumination is controlled by the main body ECU LH based on various signals received through BEAN communication.

The main body ECU LH includes a MOS-FET (Metal Oxide Semiconductor - Field Effect Transistor) circuit that fades the shift illumination in and out by duty control.

This MOS-FET circuit has an overheat protection function as a fail-safe. If the main body ECU LH becomes excessively hot, the shift illumination turns off and remains off.

Normal operation will resume when the conditions required to turn on the shift illumination are met again.

WIRING DIAGRAM

A01628RE02

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK PERSONAL LIGHT (OPERATION)

    Tech Tips

    The personal lights and shift illumination share the same power source circuit. Therefore, if none of them come on, inspect the power source circuit first.


    1. Push the switches for the personal lights.

    2. Check that the personal lights come on.

      OK
      Personal lights come on.

    NG

    CHECK HARNESS AND CONNECTOR (POWER SOURCE) Click here

    OK

  2. PERFORM ACTIVE TEST USING INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the intelligent tester on.

    4. Enter the following menus: Body / Body No. 3 / Active Test.

    5. Check the operation.

      Body No. 3 (Main Body ECU LH)
      Tester Display Test Part Control Range Diagnostic Note
      Shift Light Operation Shift illumination ON/OFF -
      OK
      The shift illumination comes on.

    NG

    CHECK HARNESS AND CONNECTOR (MAIN BODY ECU LH - OVERHEAD JUNCTION BLOCK) Click here

    OK

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here

  3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU LH - OVERHEAD JUNCTION BLOCK)


    1. A0161QQE08

      Disconnect the Q1 main body ECU LH connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      Q1-3 (RCTY) - Body ground Always 11 to 14 V

    NG

    CHECK HARNESS AND CONNECTOR (MAIN BODY ECU LH - OVERHEAD JUNCTION BLOCK) Click here

    OK

    REPLACE MAIN BODY ECU LH (COWL SIDE JUNCTION BLOCK LH)

  4. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU LH - OVERHEAD JUNCTION BLOCK)


    1. A0162GPE01

      Disconnect the Q1 main body ECU LH connector.

    2. Disconnect the R5 overhead junction block connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Q1-3 (RCTY) - R5-14 (SHFT) Always Below 1 Ω
      Q1-3 (RCTY) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE OVERHEAD JUNCTION BLOCK Click here

  5. CHECK HARNESS AND CONNECTOR (POWER SOURCE)


    1. A01631RE01

      Disconnect the R5 overhead junction block connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      R5-1 (+B1) - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE OVERHEAD JUNCTION BLOCK Click here