LIGHTING SYSTEM(for LED Headlight) Rear Fog Light Circuit

DESCRIPTION

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

WIRING DIAGRAM

B001GZ6E01

CAUTION / NOTICE / HINT

Note


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

  • Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS


    1. Using the GTS, perform the Active Test.

      Click here

      Main Body
      Tester Display Measurement Item Control Range Diagnostic Note
      Rear Fog Light Relay Rear fog lights OFF or ON Light control switch in Tail or Head position.
      OK
      Rear fog light relay operates (rear fog lights turn on).
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

  2. CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - REAR FOG LIGHT ASSEMBLY AND BATTERY)


    1. Disconnect the 2Q*1, 2P*2 and 2K driver side junction block assembly connectors.


      • *1: for LHD

      • *2: for RHD

    2. Disconnect the V3 rear fog light assembly LH connector.

    3. Disconnect the U3 rear fog light assembly RH connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      2K-1 - Body ground Always 11 to 14 V

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      2Q-11 - V3-1 Always Below 1 Ω
      2Q-11 - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      2P-11 - V3-1 Always Below 1 Ω
      2P-11 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY


    1. Remove the driver side junction block assembly.

      Click here

      B001DVZC01
      *A for LHD *B for RHD
      *a

      Component without harness connected

      (Driver Side Junction Block Assembly)

      		 - -

    2. Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly.

      Click here

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

      Standard Voltage
      for LHD
      Tester Connection Condition Specified Condition
      2Q-11 - Battery negative (-) terminal Battery not connected to 2K-1, A-14 (TRLY) and A-27 (RFGO) Below 1 V

      Battery positive (+) → 2K-1

      Battery negative (-) → A-14 (TRLY) and A-27 (RFGO)

      		 11 to 14 V
      for RHD
      Tester Connection Condition Specified Condition
      2P-11 - Battery negative (-) terminal Battery not connected to 2K-1, A-14 (TRLY) and A-27 (RFGO) Below 1 V

      Battery positive (+) → 2K-1

      Battery negative (-) → A-14 (TRLY) and A-27 (RFGO)

      		 11 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY Click here