LIGHTING SYSTEM Rear Fog Light Circuit

DESCRIPTION

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

WIRING DIAGRAM

A01ND1OE01

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. 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
      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. A01NEVEE87

      Remove the rear fog light relay from the No. 1 relay block.

    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 Voltage is applied 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. A01NH64E01
      Text in Illustration
      *1 No. 1 Relay Block

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      Relay terminal 2 - Body ground Light control switch off → tail Below 1 V → 11 to 14 V
      Relay terminal 5 - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (REAR FOG LIGHT RELAY - REAR FOG LIGHT ASSEMBLY)


    1. A01NHLKE01
      Text in Illustration
      *1 No. 1 Relay Block
      *2

      Front view of wire harness connector

      (to Rear Fog Light Assembly LH)
      *3

      Front view of wire harness connector

      (to Rear Fog Light Assembly RH)

      Disconnect the W3 or V3 rear fog light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Relay Terminal 3 - W3-2 Always Below 1 Ω
      Relay Terminal 3 - V3-2 Always Below 1 Ω
      Relay Terminal 3 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (REAR FOG LIGHT RELAY - INSTRUMENT PANEL JUNCTION BLOCK)


    1. A01NHF7E01
      Text in Illustration
      *1 No. 1 Relay Block
      *2

      Front view of wire harness connector

      (to Instrument Panel Junction Block Assembly)

      Disconnect the 2A instrument panel junction block assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Relay terminal 1 - 2A-41 Always Below 1 Ω
      2A-41 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. A01NFUWE01
      Text in Illustration
      *1

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      Remove the instrument panel junction block assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2A-41 - A-27 (RFGO) Always Below 1 Ω
      2A-41 - Body ground Always 10 kΩ or higher

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    OK

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