LIGHTING SYSTEM > Front Fog Light Circuit

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DESCRIPTION

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

WIRING DIAGRAM


E223765E04


E223765E05


INSPECTION PROCEDURE

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

  1. Turn the power switch on (IG).

  1. Turn the intelligent tester on.

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

  1. 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
Go to step 3
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.

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

  1. 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


    E224153E02

  1. Remove the instrument panel junction block assembly.

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

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

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

  1. 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

    Text in Illustration 
    *A
    		for LHD
    *B
    		for RHD
    *a
    		Component without harness connected
    (Instrument Panel Junction Block Assembly)



NG
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
OK

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