LIGHTING SYSTEM Rear Fog Light Circuit

DESCRIPTION

The main body ECU receives headlight dimmer switch information signals and illuminates the rear fog lights.

WIRING DIAGRAM

A01FGVXE02

INSPECTION PROCEDURE

Note


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

  • Recognition code registration is necessary when replacing the main body ECU (multiplex network body ECU).

  • If the main body ECU (multiplex network body ECU) is replaced, refer to the Service Bulletin.

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS (REAR FOG LIGHT RELAY)


    1. Using the GTS, perform the Active Test Click here.

      Main Body
      Tester Display Test Part Control Range Diagnostic Note
      Rear Fog Light Relay Rear fog light relay ON/OFF The headlight dimmer switch is in the tail position.
      OK
      Rear fog light relay operates (rear fog lights come on).

    NG

    CHECK HARNESS AND CONNECTOR (NO. 1 JUNCTION BLOCK - BATTERY) Click here

    OK

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

  2. CHECK HARNESS AND CONNECTOR (NO. 1 JUNCTION BLOCK - BATTERY)


    1. A01FGKEE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to No. 1 Junction Block Assembly)

      Disconnect the No. 1 junction block connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      6D-1 - Body ground Always 11 to 14 V
      6B-3 - Body ground Headlight dimmer switch in tail

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT NO. 1 JUNCTION BLOCK ASSEMBLY


    1. A01FEBME01

      Remove the No. 1 junction block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      6D-1 - 6A-5 Battery voltage applied between terminals 6B-3 and 6B-7 Below 1 Ω
      Battery voltage not applied between terminals 6B-3 and 6B-7 10 kΩ or higher

    NG

    REPLACE NO. 1 JUNCTION BLOCK ASSEMBLY

    OK

  4. CHECK HARNESS AND CONNECTOR (NO. 1 JUNCTION BLOCK - COWL SIDE JUNCTION BLOCK LH)


    1. Disconnect the 6B No. 1 junction block connector.

    2. Disconnect the 5C cowl side junction block LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      6B-7 - 5C-16 Always Below 1 Ω
      6B-7 - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT COWL SIDE JUNCTION BLOCK LH


    1. A01FHRQE02

      Remove the cowl side junction block LH Click here.

    2. Remove the main body ECU from the cowl side junction block LH Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A-27 (RFGO) - 5C-16 Always Below 1 Ω

    NG

    REPLACE COWL SIDE JUNCTION BLOCK LH Click here

    OK

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