LIGHTING SYSTEM Front Fog Light Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) controls the front fog light relay.

WIRING DIAGRAM

A003XZKE04
A003XZKE05

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. CHECK OPERATION (TAILLIGHTS)


    1. Check the operation of the taillights.

      OK
      Taillights operate normally.

    NG

    GO TO PROBLEM SYMPTOMS TABLE Click here

    OK

  2. PERFORM ACTIVE TEST USING INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the intelligent tester on.

    4. Enter the following menus: Body / Main Body / Active Test.

    5. Check that the relay operates.

      Main Body
      Tester Display Test Part Control Range Diagnostic Note
      Front Fog Light Relay Front fog light relay ON/OFF Light control switch is in head position
      OK
      Front fog light relay operates. (Front fog lights come on.)

    NG

    CHECK HARNESS AND CONNECTOR (FOG LIGHT - INSTRUMENT PANEL JUNCTION BLOCK AND BODY GROUND) Click here

    OK

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

  3. CHECK HARNESS AND CONNECTOR (FOG LIGHT - INSTRUMENT PANEL JUNCTION BLOCK AND BODY GROUND)


    1. Disconnect the 2C instrument panel junction block assembly connector.

    2. Disconnect the C1 or C2 fog light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C1-2 - 2C-8 Always Below 1 Ω
      C2-2 - 2C-8 Always Below 1 Ω
      2C-8 - Body ground Always 10 kΩ or higher
      C1-1 - Body ground Always Below 1 Ω
      C2-1 - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. A003YTFE02
      Text in Illustration
      *A for LHD
      *B for RHD
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      Remove the instrument panel junction block assembly.

    2. Connect a positive (+) lead from the auxiliary battery to terminal 2E-1 (for LHD).

    3. Connect a positive (+) lead from the auxiliary battery to terminal 2F-1 (for RHD).

    4. Connect a negative (-) lead from the auxiliary battery to terminals A-14 (TRLY) and A-13 (FFGO).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      2C-8 - Auxiliary battery negative Always 11 to 14 V

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here