Lighting System Front Fog Light Circuit

Body Electrical. Lexus Is250, Is220D. Gse20 Ale20
Lighting. Lexus Is250, Is220D. Gse20 Ale20

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTIVE TEST BY INTELLIGENT TESTER

INSPECT FUSE (FR FOG)

CHECK HARNESS AND CONNECTOR (ENGINE ROOM NO. 2 RELAY BLOCK - BATTERY)

CHECK HARNESS AND CONNECTOR (ENGINE ROOM NO. 2 R/B - FOG LIGHT)

LIGHTING SYSTEM - Front Fog Light Circuit


DESCRIPTION

The front controller receives fog light switch information from the combination switch, and turns on the fog light.

WIRING DIAGRAM


Lexus Is250, Is220D. Gse20 Ale20.Lighting.Lighting System.Lighting System Front Fog Light Circuit


INSPECTION PROCEDURE

1.PERFORM ACTIVE TEST BY INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the intelligent tester main switch on.

  1. Select the item below in the ACTIVE TEST and then check the front fog light operation.


ACTIVE TEST: Body No. 5 (Front Controller)
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)

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

  1. Measure the resistance of the fuse.

    Standard resistance:
    Below 1 Ω


NG
REPLACE FUSE
OK


3.CHECK HARNESS AND CONNECTOR (ENGINE ROOM NO. 2 RELAY BLOCK - BATTERY)


    Lexus Is250, Is220D. Gse20 Ale20.Lighting.Lighting System.Lighting System Front Fog Light Circuit

  1. Disconnect the 2E relay block connector.

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

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


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK HARNESS AND CONNECTOR (ENGINE ROOM NO. 2 R/B - FOG LIGHT)


    Lexus Is250, Is220D. Gse20 Ale20.Lighting.Lighting System.Lighting System Front Fog Light Circuit

  1. Check the wire harness between the fog light (front LH) and engine room No. 2 relay block, and the fog light (front LH) and body ground.

    1. Disconnect the 2G relay block connector.

    2. Disconnect the B13 fog light connector.

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

      Standard resistance:
      Tester Connection
      		Condition
      		Specified Condition
      2G-7 - B13-2
      		Always
      		Below 1 Ω
      2G-7 or B13-2 - Body ground
      		Always
      		10 kΩ or higher
      B13-1 - Body ground
      		Always
      		Below 1 Ω


    Lexus Is250, Is220D. Gse20 Ale20.Lighting.Lighting System.Lighting System Front Fog Light Circuit

  1. Check the wire harness between the fog light (front RH) and engine room No. 2 relay block, and the fog light (front RH) and body ground.

    1. Disconnect the 2G relay block connector.

    2. Disconnect the B1 fog light connector.

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

      Standard resistance:
      Tester Connection
      		Condition
      		Specified Condition
      2G-6 - B1-2
      		Always
      		Below 1 Ω
      2G-6 or B1-2 - Body ground
      		Always
      		10 kΩ or higher
      B1-1 - Body ground
      		Always
      		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ENGINE ROOM NO. 2 R/B (FRONT CONTROLLER)