Lighting System Inside Handle Illumination Light Circuit

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK OPERATION OF INSIDE HANDLE ILLUMINATION

PERFORM ACTIVE TEST BY INTELLIGENT TESTER

REPLACE INSIDE HANDLE ILLUMINATION (FRONT LH)

CHECK WIRE HARNESS (DOOR ECU FRONT LH - INSIDE HANDLE ILLUMINATION (FRONT LH))

PERFORM ACTIVE TEST BY INTELLIGENT TESTER

REPLACE INSIDE HANDLE ILLUMINATION (FRONT RH)

CHECK WIRE HARNESS (DOOR ECU FRONT RH - INSIDE HANDLE ILLUMINATION (FRONT RH))

PERFORM ACTIVE TEST BY INTELLIGENT TESTER

REPLACE INSIDE HANDLE ILLUMINATION (REAR LH)

CHECK WIRE HARNESS (DOOR ECU REAR LH - INSIDE HANDLE ILLUMINATION (REAR LH))

PERFORM ACTIVE TEST BY INTELLIGENT TESTER

REPLACE INSIDE HANDLE ILLUMINATION (REAR RH)

CHECK WIRE HARNESS (DOOR ECU REAR RH - INSIDE HANDLE ILLUMINATION (REAR RH))

LIGHTING SYSTEM - Inside Handle Illumination Light Circuit


DESCRIPTION

The inside handle illumination light illuminates when the door is opened and turns off when the door is closed.

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System.Lighting System Inside Handle Illumination Light Circuit


Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System.Lighting System Inside Handle Illumination Light Circuit


Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System.Lighting System Inside Handle Illumination Light Circuit


Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System.Lighting System Inside Handle Illumination Light Circuit


INSPECTION PROCEDURE

1.CHECK OPERATION OF INSIDE HANDLE ILLUMINATION

  1. When a door is opened, check that the following inside handle illumination lights illuminate.

    Result:

    Result
    		Proceed to
    Inside handle illumination (front LH) does not illuminate
    		A
    Inside handle illumination (front RH) does not illuminate
    		B
    Inside handle illumination (rear LH) does not illuminate
    		C
    Inside handle illumination (rear RH) does not illuminate
    		D


B
Go to step 5

C
Go to step 8

D
Go to step 11
A


2.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 inside handle illumination light illuminates.


Multiplex network door ECU front LH:

Item
Test Details
Diagnostic Note
Inside Handle Illumination
Inside handle illumination ON / OFF
-
OK:
Light illuminates.


NG
Go to step 3
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

3.REPLACE INSIDE HANDLE ILLUMINATION (FRONT LH)

  1. Temporarily replace the inside handle illumination (front LH) with a new or normally functioning one.

  1. Check that the illumination light illuminates.

    OK:
    Inside handle illumination light illuminates.


OK
END
NG


4.CHECK WIRE HARNESS (DOOR ECU FRONT LH - INSIDE HANDLE ILLUMINATION (FRONT LH))


    Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System.Lighting System Inside Handle Illumination Light Circuit

  1. Disconnect the O3 ECU connector.

  1. Disconnect the S1 light connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    O3-14 (LED+) - S1-1
    		Below 1 Ω
    O3-13 (LED-) - S1-2
    		Below 1 Ω
    O3-14 (LED+) or S1-1 - Body ground
    		10 kΩ or higher
    O3-13 (LED-) or S1-2 - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

5.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 inside handle illumination light illuminates.


Multiplex network door ECU front RH:

Item
Test Details
Diagnostic Note
Inside Handle Illumination
Inside handle illumination ON / OFF
-
OK:
Light illuminates.


NG
Go to step 6
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

6.REPLACE INSIDE HANDLE ILLUMINATION (FRONT RH)

  1. Temporarily replace the inside handle illumination (front LH) with a new or normally functioning one.

  1. Check that the illumination light illuminates.

    OK:
    Inside handle illumination light illuminates.


OK
END
NG


7.CHECK WIRE HARNESS (DOOR ECU FRONT RH - INSIDE HANDLE ILLUMINATION (FRONT RH))


    Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System.Lighting System Inside Handle Illumination Light Circuit

  1. Disconnect the N4 ECU connector.

  1. Disconnect the R1 light connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    N4-14 (LED+) - R1-1
    		Below 1 Ω
    N4-13 (LED-) - R1-2
    		Below 1 Ω
    N4-14 (LED+) or R1-1 - Body ground
    		10 kΩ or higher
    N4-13 (LED-) or R1-2 - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

8.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 inside handle illumination light illuminates.


Multiplex network door ECU rear LH:

Item
Test Details
Diagnostic Note
Inside Handle Illumination
Inside handle illumination ON / OFF
-
OK:
Light illuminates.


NG
Go to step 9
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

9.REPLACE INSIDE HANDLE ILLUMINATION (REAR LH)

  1. Temporarily replace the inside handle illumination (rear LH) with a new or normally functioning one.

  1. Check that the illumination light illuminates.

    OK:
    Inside handle illumination light illuminates.


OK
END
NG


10.CHECK WIRE HARNESS (DOOR ECU REAR LH - INSIDE HANDLE ILLUMINATION (REAR LH))


    Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System.Lighting System Inside Handle Illumination Light Circuit

  1. Disconnect the Q2 ECU connector.

  1. Disconnect the U3 light connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    Q2-14 (LED+) - U3-1
    		Below 1 Ω
    Q2-13 (LED-) - U3-2
    		Below 1 Ω
    Q2-14 (LED+) or U3-1 - Body ground
    		10 kΩ or higher
    Q2-13 (LED-) or U3-2 - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

11.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 inside handle illumination light illuminates.


Multiplex network door ECU rear RH:

Item
Test Details
Diagnostic Note
Inside Handle Illumination
Inside handle illumination ON / OFF
-
OK:
Light illuminates.


NG
Go to step 12
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

12.REPLACE INSIDE HANDLE ILLUMINATION (REAR RH)

  1. Temporarily replace the inside handle illumination (rear RH) with a new or normally functioning one.

  1. Check that the illumination light illuminates.

    OK:
    Inside handle illumination light illuminates.


OK
END
NG


13.CHECK WIRE HARNESS (DOOR ECU REAR RH - INSIDE HANDLE ILLUMINATION (REAR RH))


    Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System.Lighting System Inside Handle Illumination Light Circuit

  1. Disconnect the P3 ECU connector.

  1. Disconnect the T3 light connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    P3-14 (LED+) - T3-1
    		Below 1 Ω
    P3-13 (LED-) - T3-2
    		Below 1 Ω
    P3-14 (LED+) or T3-1 - Body ground
    		10 kΩ or higher
    P3-13 (LED-) or T3-2 - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE