Power Door Lock Control System All Doors Lock / Unlock Functions Do Not Operate Via Master Switch, Driver Side Door Key Cylinder

Body Electrical. Lexus Gs430, Gs300. Uzs190 Grs190
Door Lock. Lexus Gs430, Gs300. Uzs190 Grs190

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT FUSE (FR DOOR LH*1, FR DOOR RH*2, MPX-B, D/C CUT)

CHECK WIRE HARNESS (DRIVER DOOR ECU - BATTERY AND BODY GROUND)

CHECK DOOR LOCK OPERATION

REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY (POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY)

READ VALUE OF INTELLIGENT TESTER (DOOR LOCK AND UNLOCK SWITCH)

INSPECT FRONT DOOR LOCK ASSEMBLY (DRIVER SIDE) (DOOR LOCK AND UNLOCK SWITCH)

CHECK WIRE HARNESS (FRONT DOOR LOCK ASSEMBLY - MULTIPLEX NETWORK MASTER SWITCH)

CHECK WIRE HARNESS (DRIVER DOOR ECU - FRONT DOOR LOCK ASSEMBLY (DRIVER SIDE))

REPLACE DRIVER DOOR ECU

POWER DOOR LOCK CONTROL SYSTEM - All Doors LOCK / UNLOCK Functions do not Operate Via Master Switch, Driver Side Door Key Cylinder


DESCRIPTION

The multiplex network body ECU receives switch signals from the multiplex network master switch and driver side door key cylinder, and activates the door lock motor on each door according to the signals.

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.Door Lock.Power Door Lock Control System.Power Door Lock Control System All Doors Lock / Unlock Functions Do Not Operate Via Master Switch, Driver Side Door Key Cylinder


Lexus Gs430, Gs300. Uzs190 Grs190.Door Lock.Power Door Lock Control System.Power Door Lock Control System All Doors Lock / Unlock Functions Do Not Operate Via Master Switch, Driver Side Door Key Cylinder


INSPECTION PROCEDURE

1.INSPECT FUSE (FR DOOR LH*1, FR DOOR RH*2, MPX-B, D/C CUT)

  1. Remove the FR DOOR LH*1 fuse from the cowl side junction block LH.

  1. Remove the FR DOOR EGH*2 fuse from the cowl side junction block RH.

  1. Remove the MPX-B and D/C CUT fuses from the engine room No. 1 junction block.

  1. Measure the resistance of the fuses.

    Standard resistance:
    Below 1 Ω
    HINT:
    *1: LHD
    *2: RHD


NG
REPLACE FUSE
OK


2.CHECK WIRE HARNESS (DRIVER DOOR ECU - BATTERY AND BODY GROUND)
Lexus Gs430, Gs300. Uzs190 Grs190.Door Lock.Power Door Lock Control System.Power Door Lock Control System All Doors Lock / Unlock Functions Do Not Operate Via Master Switch, Driver Side Door Key Cylinder

  1. Disconnect the O3*1 or N4*2 ECU connector.

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

    Standard voltage:
    LHD
    Tester Connection
    		Specified Condition
    O3-4 (CPUB) - Body ground
    		10 to 14 V
    O3-6 (BDR) - Body ground
    		10 to 14 V
    RHD:
    Tester Connection
    		Specified Condition
    N4-4 (CPUB) - Body ground
    		10 to 14 V
    N4-6 (BDR) - Body ground
    		10 to 14 V

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

    Standard resistance:
    LHD
    Tester Connection
    		Specified Condition
    O3-1 (GND) - Body ground
    		Below 1 Ω
    RHD:
    Tester Connection
    		Specified Condition
    N4-1 (GND) - Body ground
    		Below 1 Ω
    HINT:
    *1: LHD
    *2: RHD


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


3.CHECK DOOR LOCK OPERATION

Result:

Result
Proceed to
Doors cannot be locked through master switch
A
Doors cannot be locked through driver side door key cylinder
B


B
Go to step 5
A


4.REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY (POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY)

  1. After replacing the multiplex network master switch assembly with a normal one, check that all doors can be locked and unlocked by using the master switch.

    OK:
    All doors can be locked and unlocked with master switch.


NG
REPLACE COWL SIDE JUNCTION BLOCK RH (MULTIPLEX NETWORK BODY ECU)
OK

END (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY IS FAULTY)

5.READ VALUE OF INTELLIGENT TESTER (DOOR LOCK AND UNLOCK SWITCH)

  1. Check the Data List for proper functioning of the door lock and unlock switch.


Multiplex network master switch assembly:

Item
Measurement Item/Display (Range)
Normal Condition
Diagnostic Note
Door Key Lock
Door key-linked lock switch signal/ ON or OFF
ON: Driver side door key cylinder is turned to lock position
OFF: Driver side door key cylinder is turned to unlock position
-
Door Key Unlock
Door key-linked unlock switch signal/ ON or OFF
ON: Driver side door key cylinder is turned to unlock position
OFF: Driver side door key cylinder is turned to lock position
-
OK:
ON (driver side door key cylinder is turned to lock/unlock position) appears on screen.


NG
Go to step 6
OK

REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

6.INSPECT FRONT DOOR LOCK ASSEMBLY (DRIVER SIDE) (DOOR LOCK AND UNLOCK SWITCH)

Lexus Gs430, Gs300. Uzs190 Grs190.Door Lock.Power Door Lock Control System.Power Door Lock Control System All Doors Lock / Unlock Functions Do Not Operate Via Master Switch, Driver Side Door Key Cylinder

  1. Disconnect the O6*1 or N6*2 door lock connector.

  1. Measure the resistance of the switch.

    Standard resistance:
    LHD
    Tester Connection
    		Condition
    		Specified Condition
    9 - 7
    		Lock
    		Below 1 Ω
    10 - 7
    		Unlock
    		Below 1 Ω
    9 - 7
    		OFF
    		10 kΩ or higher
    10 - 7
    		OFF
    		10 kΩ or higher
    RHD:
    Tester Connection
    		Condition
    		Specified Condition
    6 - 8
    		Lock
    		Below 1 Ω
    5 - 8
    		Unlock
    		Below 1 Ω
    6 - 8
    		OFF
    		10 kΩ or higher
    5 - 8
    		OFF
    		10 kΩ or higher
    HINT:
    *1: LHD
    *2: RHD


NG
REPLACE FRONT DOOR LOCK ASSEMBLY (DRIVER SIDE)
OK


7.CHECK WIRE HARNESS (FRONT DOOR LOCK ASSEMBLY - MULTIPLEX NETWORK MASTER SWITCH)
Lexus Gs430, Gs300. Uzs190 Grs190.Door Lock.Power Door Lock Control System.Power Door Lock Control System All Doors Lock / Unlock Functions Do Not Operate Via Master Switch, Driver Side Door Key Cylinder

  1. Disconnect the O6*1 or N6*2 door lock connector.

  1. Disconnect the S5*1 or R9*2 switch connector.

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

    Standard resistance:
    LHD
    Tester Connection
    		Specified Condition
    O6-9 (L) - S5-4 (KL)
    		Below 1 Ω
    O6-10 (UL) - S5-14 (KUL)
    		Below 1 Ω
    RHD:
    Tester Connection
    		Specified Condition
    N6-6 (L) - R9-4 (KL)
    		Below 1 Ω
    N6-5 (UL) - R9-14 (KUL)
    		Below 1 Ω
    HINT:
    *1: LHD
    *2: RHD


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


8.CHECK WIRE HARNESS (DRIVER DOOR ECU - FRONT DOOR LOCK ASSEMBLY (DRIVER SIDE))
Lexus Gs430, Gs300. Uzs190 Grs190.Door Lock.Power Door Lock Control System.Power Door Lock Control System All Doors Lock / Unlock Functions Do Not Operate Via Master Switch, Driver Side Door Key Cylinder

  1. Disconnect the O3*1 or N4*2 ECU connector.

  1. Disconnect the O6*1 or N6*2 door lock connector.

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

    Standard resistance:
    LHD
    Tester Connection
    		Specified Condition
    O4-13 (LSWE) - O6-7 (E)
    		Below 1 Ω
    RHD:
    Tester Connection
    		Specified Condition
    N3-13 (LSWE) - N6-8 (E)
    		Below 1 Ω
    HINT:
    *1: LHD
    *2: RHD


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


9.REPLACE DRIVER DOOR ECU

  1. After replacing the driver door ECU with a normal one, check that all doors can be locked and unlocked by using the driver side door key cylinder.

    OK:
    All doors can be locked and unlocked with driver side door key cylinder.


NG
REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY
OK

END (DRIVER DOOR ECU IS FAULTY)