Lighting System Front Fog Light Circuit

Body Electrical. Lexus Gs430, Gs300. Uzs190 Grs190
Lighting. Lexus Gs430, Gs300. Uzs190 Grs190

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTIVE TEST BY INTELLIGENT TESTER

INSPECT FUSE (FR FOG, FR CTRL-AM)

REPLACE FOG LIGHT BULB (FRONT RH OR FRONT LH)

CHECK WIRE HARNESS (ENGINE ROOM NO. 2 JUNCTION BLOCK - BATTERY)

CHECK WIRE HARNESS (ENGINE ROOM NO. 2 JUNCTION BLOCK - BODY GROUND)

LIGHTING SYSTEM - Front Fog Light Circuit


DESCRIPTION

The Engine room No. 2 relay block receives fog light switch information from the combination switch, and turns on the fog light.

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System.Lighting System Front Fog Light Circuit


INSPECTION PROCEDURE

1.PERFORM ACTIVE TEST BY INTELLIGENT TESTER

  1. Select the item below in the Active Test, use the intelligent tester to generate a control command, and then check that the fog light illuminates.


Engine room No. 2 relay block:

Item
Test Details
Diagnostic Note
Front fog light relay
Front fog light relay ON / OFF
-
OK:
Fog light illuminates.


NG
Go to step 2
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

2.INSPECT FUSE (FR FOG, FR CTRL-AM)

  1. Remove the FR CTRL-AM fuses from the engine room No. 2 relay block.

  1. Remove the FR FOG from the engine room No. 2 junction block.

  1. Measure the resistance of the fuses.

    Standard resistance:
    Below 1 Ω


NG
REPLACE FUSE
OK


3.REPLACE FOG LIGHT BULB (FRONT RH OR FRONT LH)

  1. Temporarily replace the fog light bulb with a new or normally functioning one.

  1. Check that the bulb illuminates.

    OK:
    Fog light bulb illuminates.


OK
END
NG


4.CHECK WIRE HARNESS (ENGINE ROOM NO. 2 JUNCTION BLOCK - BATTERY)


    Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System.Lighting System Front Fog Light Circuit

  1. Disconnect the 2E junction block connector.

  1. Measure the resistance of the wire harness side connector.

    Standard voltage:
    Tester Connection
    		Specified Condition
    2E-1 - Body ground
    		10 to 14 V


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


5.CHECK WIRE HARNESS (ENGINE ROOM NO. 2 JUNCTION BLOCK - BODY GROUND)


    Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System.Lighting System Front Fog Light Circuit

  1. Disconnect the 2G junction block connector.

  1. Measure the resistance of the wire harness side connector.

    Standard resistance:
    Tester Connection
    		Specified Condition
    2G-6 - Body ground
    		Below 1 Ω
    2G-7 - Body ground
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE