LIGHTING SYSTEM Engine Switch Illumination Circuit

DESCRIPTION

When either of the following conditions is met, the engine switch illumination comes on.


WIRING DIAGRAM

A01CDKME12

INSPECTION PROCEDURE

PROCEDURE


  1. 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 / Main Body / Active Test.

    5. Check the operation.

      Main Body
      Tester Display Test Part Control Range Diagnostic Note
      Indicator for Lighting Engine switch illumination ON/OFF All doors are closed.
      OK
      Engine switch illumination comes on.

    NG

    INSPECT ENGINE SWITCH Click here

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

  2. INSPECT ENGINE SWITCH


    1. Remove the engine switch Click here for 2GR-FE, Click here for 2AZ-FE).

      A01CCX1E21

    2. Connect a positive (+) lead from the battery to terminal 11 and a negative (-) lead to terminal 4 or 5.

    3. Check that the illumination comes on.

      OK
      Engine switch illumination comes on.
      Result
      Result Proceed to
      OK A
      NG (for 2GR-FE) B
      NG (for 2AZ-FE) C

    B

    REPLACE ENGINE SWITCH (for 2GR-FE) Click here

    C

    REPLACE ENGINE SWITCH (for 2AZ-FE) Click here

    A

  3. CHECK HARNESS OR CONNECTOR (ENGINE SWITCH - MAIN BODY ECU AND BODY GROUND)


    1. A01CBQ9E01

      Disconnect the G48 main body ECU connector.

    2. Disconnect the G21 engine switch connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G21-11 (SWIL) - G48-25 (SWIL) Always Below 1 Ω
      G21-4 (COM) or G21-5 (GND) - Body ground Always Below 1 Ω
      G48-25 (SWIL) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU Click here