Lighting System Luggage Room 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 (RR-B)

REPLACE ROOM LIGHT (LUGGAGE)

CHECK WIRE HARNESS (COWL SIDE JUNCTION BLOCK ECU LH - BATTERY)

INSPECT LUGGAGE DOOR CLOSER (LUGGAGE DOOR COURTESY SWITCH)

CHECK WIRE HARNESS (COWL SIDE JUNCTION BLOCK ECU LH - LUGGAGE DOOR CLOSER - BODY GROUND)

LIGHTING SYSTEM - Luggage Room Light Circuit


DESCRIPTION

The No. 1 junction block assembly receives luggage room door information, and turns on the luggage compartment lights.

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System.Lighting System Luggage Room Light Circuit


INSPECTION PROCEDURE

1.PERFORM ACTIVE TEST BY INTELLIGENT TESTER

  1. Select the Active Test, use the intelligent tester to generate a control command, and then check that the room light (luggage) illuminates.

    Cowl side junction block ECU LH:

    Item
    		Test Details
    		Diagnostic Note
    Luggage Light control
    		Luggage light control ON / OFF
    		-
    OK:
    Luggage room light illuminates.


OK
Go to step 2
NG

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

2.INSPECT FUSE (RR-B)

  1. Remove the RR-B fuse from the No. 1 junction block assembly.

  1. Measure the resistance of the fuse.

    Standard resistance:
    Below 1 Ω


NG
REPLACE FUSE
OK


3.REPLACE ROOM LIGHT (LUGGAGE)

  1. Temporarily replace the room light (luggage) with a new or normally functioning one.

  1. Turn the room light switch ON.

  1. Check that the light illuminates.

    OK:
    Room light illuminates.


OK
END
NG


4.CHECK WIRE HARNESS (COWL SIDE JUNCTION BLOCK ECU LH - BATTERY)


    Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System.Lighting System Luggage Room Light Circuit

  1. Disconnect the W3 ECU connector.

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

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    W3-3 (LGCY) - Body ground
    		Room light switch ON
    		10 to 14 V
    W3-3 (LGCY) - Body ground
    		Room light switch OFF
    		0 V


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


5.INSPECT LUGGAGE DOOR CLOSER (LUGGAGE DOOR COURTESY SWITCH)
Inspection (Click here)
OK:
Luggage door closer (luggage door courtesy switch) is normal.


NG
REPLACE LUGGAGE DOOR CLOSER
OK


6.CHECK WIRE HARNESS (COWL SIDE JUNCTION BLOCK ECU LH - LUGGAGE DOOR CLOSER - BODY GROUND)


    Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System.Lighting System Luggage Room Light Circuit

  1. Disconnect the W3 ECU connector.

  1. Disconnect the a5 closer connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    W3-8 (CCTY) - a5-4 (CTY)
    		Below 1 Ω
    W3-8 (CCTY) or a5-4 (CTY) - Body ground
    		10 kΩ or higher
    a5-3 (E) - Body ground
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE