Lighting System Door Courtesy Light Circuit

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK OPERATION OF COURTESY LIGHT AND OUTER SCUFF LIGHT

PERFORM ACTIVE TEST BY INTELLIGENT TESTER

REPLACE COURTESY LIGHT (FRONT DOOR LH)

CHECK WIRE HARNESS (DOOR ECU FRONT LH - COURTESY LIGHT (FRONT DOOR LH))

REPLACE OUTER SCUFF LIGHT (FRONT DOOR LH)

CHECK WIRE HARNESS (DOOR ECU FRONT LH - OUTER SCUFF LIGHT (FRONT DOOR LH))

PERFORM ACTIVE TEST BY INTELLIGENT TESTER

REPLACE COURTESY LIGHT (FRONT DOOR RH)

CHECK WIRE HARNESS (DOOR ECU FRONT RH - COURTESY LIGHT (FRONT DOOR RH))

REPLACE OUTER SCUFF LIGHT (FRONT DOOR RH)

CHECK WIRE HARNESS (DOOR ECU FRONT RH - OUTER SCUFF LIGHT (FRONT DOOR RH))

PERFORM ACTIVE TEST BY INTELLIGENT TESTER

REPLACE COURTESY LIGHT (REAR DOOR LH)

CHECK WIRE HARNESS (DOOR ECU REAR LH - COURTESY LIGHT (REAR DOOR LH))

PERFORM ACTIVE TEST BY INTELLIGENT TESTER

REPLACE COURTESY LIGHT (REAR DOOR RH)

CHECK WIRE HARNESS (DOOR ECU REAR RH - COURTESY LIGHT (REAR DOOR RH))

LIGHTING SYSTEM - Door Courtesy Light Circuit


DESCRIPTION

The door courtesy light turns on when the door is opened and turns off when closed.

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System.Lighting System Door Courtesy Light Circuit


Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System.Lighting System Door Courtesy Light Circuit


Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System.Lighting System Door Courtesy Light Circuit


Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System.Lighting System Door Courtesy Light Circuit


INSPECTION PROCEDURE

1.CHECK OPERATION OF COURTESY LIGHT AND OUTER SCUFF LIGHT

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

    Result:

    Result
    		Proceed to
    Courtesy or outer scuff light (front door LH) does not illuminate
    		A
    Courtesy or outer scuff light (front door RH) does not illuminate
    		B
    Courtesy light (rear door LH) does not illuminate
    		C
    Courtesy light (rear door RH) does not illuminate
    		D


B
Go to step 7

C
Go to step 12

D
Go to step 15
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 courtesy light illuminates.

    Multiplex network door ECU front LH:

    Item
    		Test Details
    		Diagnostic Note
    Courtesy Light
    		Courtesy light ON / OFF
    		-

    Result:

    Result
    		Proceed to
    OK
    		A
    When courtesy light does not illuminate
    		B
    When scuff light does not illuminate
    		C


B
Go to step 3

C
Go to step 5
A

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

3.REPLACE COURTESY LIGHT (FRONT DOOR LH)

  1. Temporarily replace the courtesy light (front door LH) with a new or normally functioning one.

  1. Check that the courtesy light illuminates.

    OK:
    Courtesy light illuminates.


OK
END
NG


4.CHECK WIRE HARNESS (DOOR ECU FRONT LH - COURTESY LIGHT (FRONT DOOR LH))


    Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System.Lighting System Door Courtesy Light Circuit

  1. Disconnect the O3 ECU connector.

  1. Disconnect the S7 light connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    O3-12 (CTYB) - S7-2
    		Below 1 Ω
    O3-11 (CYL) - S7-1
    		Below 1 Ω
    O3-12 (CTYB) or S7-2 - Body ground
    		10 kΩ or higher
    O3-11 (CYL) or S7-1 - 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.REPLACE OUTER SCUFF LIGHT (FRONT DOOR LH)

  1. Temporarily replace the outer scuff light (front door LH) with a new or normally functioning one.

  1. Check that the outer scuff light illuminates.

    OK:
    Outer scuff light illuminates.


OK
END
NG


6.CHECK WIRE HARNESS (DOOR ECU FRONT LH - OUTER SCUFF LIGHT (FRONT DOOR LH))


    Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System.Lighting System Door Courtesy Light Circuit

  1. Disconnect the O3 ECU connector.

  1. Disconnect the S6 light connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    O3-12 (CTYB) - S6-2
    		Below 1 Ω
    O3-11 (CYL) - S6-1
    		Below 1 Ω
    O3-12 (CTYB) or S6-2 - Body ground
    		10 kΩ or higher
    O3-11 (CYL) or S6-1 - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

7.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 courtesy light (front door RH) illuminates.

    Multiplex network door ECU front RH:

    Item
    		Test Details
    		Diagnostic Note
    Courtesy Light
    		Courtesy light ON / OFF
    		-

    Result:

    Result
    		Proceed to
    OK
    		A
    When courtesy light does not illuminate
    		B
    When scuff light does not illuminate
    		C


B
Go to step 8

C
Go to step 10
A

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

8.REPLACE COURTESY LIGHT (FRONT DOOR RH)

  1. Temporarily replace the courtesy light (front door RH) with a new or normally functioning one.

  1. Check that the courtesy light illuminates.

    OK:
    Courtesy light illuminates.


OK
END
NG


9.CHECK WIRE HARNESS (DOOR ECU FRONT RH - COURTESY LIGHT (FRONT DOOR RH))


    Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System.Lighting System Door Courtesy Light Circuit

  1. Disconnect the N4 ECU connector.

  1. Disconnect the R8 light connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    N4-12 (CTYB) - R8-2
    		Below 1 Ω
    N4-11 (CYL) - R8-1
    		Below 1 Ω
    N4-12 (CTYB) or R8-2 - Body ground
    		10 kΩ or higher
    N4-11 (CYL) or R8-1 - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

10.REPLACE OUTER SCUFF LIGHT (FRONT DOOR RH)

  1. Temporarily replace the outer scuff light (front door RH) with a new or normally functioning one.

  1. Check that the outer scuff light illuminates.

    OK:
    Outer scuff light illuminates.


OK
END
NG


11.CHECK WIRE HARNESS (DOOR ECU FRONT RH - OUTER SCUFF LIGHT (FRONT DOOR RH))


    Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System.Lighting System Door Courtesy Light Circuit

  1. Disconnect the N4 ECU connector.

  1. Disconnect the R7 light connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    N4-12 (CTYB) - R7-2
    		Below 1 Ω
    N4-11 (CYL) - R7-1
    		Below 1 Ω
    N4-12 (CTYB) or R7-2 - Body ground
    		10 kΩ or higher
    N4-11 (CYL) or R7-1 - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

12.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 courtesy light illuminates.

    Multiplex network door ECU rear LH:

    Item
    		Test Details
    		Diagnostic Note
    Courtesy Light
    		Courtesy light ON / OFF
    		-


NG
Go to step 13
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

13.REPLACE COURTESY LIGHT (REAR DOOR LH)

  1. Temporarily replace the courtesy light (rear door LH) with a new or normally functioning one.

  1. Check that the courtesy light illuminates.

    OK:
    Courtesy light illuminates.


OK
END
NG


14.CHECK WIRE HARNESS (DOOR ECU REAR LH - COURTESY LIGHT (REAR DOOR LH))


    Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System.Lighting System Door Courtesy Light Circuit

  1. Disconnect the Q2 ECU connector.

  1. Disconnect the U2 light connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    Q2-12 (CTYB) - U2-2
    		Below 1 Ω
    Q2-11 (CYL) - U2-1
    		Below 1 Ω
    Q2-12 (CTYB) or U2-2 - Body ground
    		10 kΩ or higher
    Q2-11 (CYL) or U2-1 - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

15.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 courtesy light illuminates.

    Multiplex network door ECU rear RH:

    Item
    		Test Details
    		Diagnostic Note
    Courtesy Light
    		Courtesy light ON / OFF
    		-


NG
Go to step 16
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

16.REPLACE COURTESY LIGHT (REAR DOOR RH)

  1. Temporarily replace the courtesy light (rear door RH) with a new or normally functioning one.

  1. Check that the courtesy light illuminates.

    OK:
    Courtesy light illuminates.


OK
END
NG


17.CHECK WIRE HARNESS (DOOR ECU REAR RH - COURTESY LIGHT (REAR DOOR RH))


    Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System.Lighting System Door Courtesy Light Circuit

  1. Disconnect the P3 ECU connector.

  1. Disconnect the T2 light connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    P3-12 (CTYB) - T2-2
    		Below 1 Ω
    P3-11 (CYL) - T2-1
    		Below 1 Ω
    P3-12 (CTYB) or T2-2 - Body ground
    		10 kΩ or higher
    P3-11 (CYL) or T2-1 - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE