LIGHTING SYSTEM Rear Fog Light Circuit

DESCRIPTION

The main body ECU controls the rear fog light relay when a signal is received from the headlight dimmer switch assembly.

WIRING DIAGRAM

A01CEYOE01

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 that the relay operates.

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

    NG

    INSPECT REAR FOG LIGHT RELAY (RR FOG) Click here

    OK

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

  2. INSPECT REAR FOG LIGHT RELAY (RR FOG)


    1. A01CG0EE87

      Remove the rear fog light relay from the fusible link block assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3-5 Voltage is not applied between terminals 1 and 2 10 kΩ or higher
      3-5 Apply the battery voltage between terminals 1 and 2 Below 1 Ω

    NG

    REPLACE REAR FOG LIGHT RELAY

    OK

  3. CHECK HARNESS AND CONNECTOR (BATTERY - REAR FOG LIGHT RELAY)


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

      Standard Voltage
      Tester Connection Condition Specified Condition
      Rear fog light relay terminal 5 - Body ground Always 11 to 14 V
      Rear fog light relay terminal 2 - Body ground Light control switch OFF → TAIL Below 1 V → 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (REAR FOG LIGHT RELAY - MAIN BODY ECU)


    1. Disconnect the G50 main body ECU connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      Rear fog light relay terminal 1 - G50-14 (RFGO) Always Below 1 Ω
      G50-14 (RFGO) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (REAR FOG LIGHT - REAR FOG LIGHT RELAY AND BODY GROUND)


    1. Disconnect the T5 rear fog light connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Front fog light relay terminal 3 - T5-1 Always Below 1 Ω
      T5-1 - Body ground Always 10 kΩ or higher
      T5-2 - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU