Power Door Lock Control System Double Lock Function Does Not Operate Properly

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK WIRELESS DOOR LOCK CONTROL SYSTEM

PERFORM ACTIVE TEST BY INTELLIGENT TESTER (DOUBLE DOOR LOCK MOTOR)

PERFORM ACTIVE TEST BY INTELLIGENT TESTER (DOUBLE DOOR LOCK MOTOR)

PERFORM ACTIVE TEST BY INTELLIGENT TESTER (DOUBLE DOOR LOCK MOTOR)

PERFORM ACTIVE TEST BY INTELLIGENT TESTER (DOUBLE DOOR LOCK MOTOR)

INSPECT FRONT DOOR LOCK ASSEMBLY (DRIVER SIDE) (DOUBLE DOOR LOCK MOTOR)

READ VALUE OF INTELLIGENT TESTER (DOUBLE DOOR LOCK POSITION SWITCH)

INSPECT FRONT DOOR LOCK ASSEMBLY (DRIVER SIDE) (DOUBLE DOOR LOCK POSITION SWITCH)

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

INSPECT FRONT DOOR LOCK ASSEMBLY (PASSENGER SIDE) (DOUBLE DOOR LOCK MOTOR)

READ VALUE OF INTELLIGENT TESTER (DOUBLE DOOR LOCK POSITION SWITCH)

INSPECT FRONT DOOR LOCK ASSEMBLY (PASSENGER SIDE) (DOUBLE DOOR LOCK POSITION SWITCH)

CHECK WIRE HARNESS (PASSENGER DOOR ECU - FRONT DOOR LOCK ASSEMBLY)

INSPECT REAR DOOR LOCK ASSEMBLY LH (DOUBLE DOOR LOCK MOTOR)

READ VALUE OF INTELLIGENT TESTER (DOUBLE DOOR LOCK POSITION SWITCH)

INSPECT REAR DOOR LOCK ASSEMBLY LH (DOUBLE DOOR LOCK POSITION SWITCH)

CHECK WIRE HARNESS (REAR DOOR LH ECU - REAR DOOR LOCK ASSEMBLY LH)

INSPECT REAR DOOR LOCK ASSEMBLY RH (DOUBLE DOOR LOCK MOTOR)

READ VALUE OF INTELLIGENT TESTER (DOUBLE DOOR LOCK POSITION SWITCH)

INSPECT REAR DOOR LOCK ASSEMBLY RH (DOUBLE DOOR LOCK POSITION SWITCH)

CHECK WIRE HARNESS (REAR DOOR RH ECU - REAR DOOR LOCK ASSEMBLY RH)

POWER DOOR LOCK CONTROL SYSTEM - Double Lock Function does not Operate Properly


DESCRIPTION

All the doors except the luggage compartment door have the double lock function. This system is set and unset by the multiplex network body ECU. When the multiplex network body ECU receives a request signal from the wireless transmitter to set or unset the double lock function, it drives the double lock motor built into each door lock according to the conditions of the double lock position switches, thus causing the double locking system to be set or unset.

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.Door Lock.Power Door Lock Control System.Power Door Lock Control System Double Lock Function Does Not Operate Properly


Lexus Gs430, Gs300. Uzs190 Grs190.Door Lock.Power Door Lock Control System.Power Door Lock Control System Double Lock Function Does Not Operate Properly


INSPECTION PROCEDURE

1.CHECK WIRELESS DOOR LOCK CONTROL SYSTEM

  1. Check that the doors can be locked and unlocked normally using the wireless operation.

    OK:
    Doors can be locked and unlocked normally using wireless operation.


NG
GO TO WIRELESS DOOR LOCK CONTROL SYSTEM
OK


2.PERFORM ACTIVE TEST BY INTELLIGENT TESTER (DOUBLE DOOR LOCK MOTOR)

  1. Select the Active Test, use the intelligent tester to generate a control command, and then check that the double door lock motor operates normally.

    Driver door ECU:

    Item
    		Tester Details
    		Diagnostic Note
    Double Lock Unset
    		Operate double lock motor/UNSET or SET
    		-
OK:
Double door lock motor operates normally.


NG
Go to step 6
OK


3.PERFORM ACTIVE TEST BY INTELLIGENT TESTER (DOUBLE DOOR LOCK MOTOR)

  1. Select the Active Test, use the intelligent tester to generate a control command, and then check that the double door lock motor operates normally.

    Passenger door ECU:

    Item
    		Tester Details
    		Diagnostic Note
    Double Lock Unset
    		Operate double lock motor/UNSET or SET
    		-
OK:
Double door lock motor operates normally.


NG
Go to step 10
OK


4.PERFORM ACTIVE TEST BY INTELLIGENT TESTER (DOUBLE DOOR LOCK MOTOR)

  1. Select the Active Test, use the intelligent tester to generate a control command, and then check that the double door lock motor operates normally.

    Rear door ECU LH:

    Item
    		Tester Details
    		Diagnostic Note
    Double Lock Unset
    		Operate double lock motor/UNSET or SET
    		-
OK:
Double door lock motor operates normally.


NG
Go to step 14
OK


5.PERFORM ACTIVE TEST BY INTELLIGENT TESTER (DOUBLE DOOR LOCK MOTOR)

  1. Select the Active Test, use the intelligent tester to generate a control command, and then check that the double door lock motor operates normally.

    Rear door ECU RH:

    Item
    		Tester Details
    		Diagnostic Note
    Double Lock Unset
    		Operate double lock motor/UNSET or SET
    		-
OK:
Double door lock motor operates normally.


NG
Go to step 18
OK

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

6.INSPECT FRONT DOOR LOCK ASSEMBLY (DRIVER SIDE) (DOUBLE DOOR LOCK MOTOR)

Lexus Gs430, Gs300. Uzs190 Grs190.Door Lock.Power Door Lock Control System.Power Door Lock Control System Double Lock Function Does Not Operate Properly

  1. Check operation of the double lock motor.

    1. Apply battery voltage to the door lock and set the door lock motor to the lock position.

      OK :
      LHD
      Measurement Condition
      		Specified Condition
      Battery positive (+) → Terminal 4
      Battery negative (-) → Terminal 3
      		Lock
      Battery positive (+) → Terminal 3
      Battery negative (-) → Terminal 4
      		Unlock
      RHD:
      Measurement Condition
      		Specified Condition
      Battery positive (+) → Terminal 2
      Battery negative (-) → Terminal 1
      		Lock
      Battery positive (+) → Terminal 1
      Battery negative (-) → Terminal 2
      		Unlock

    2. Apply battery voltage to the door lock motor and check the operation of the double door lock motor.

      OK :
      LHD
      Measurement Condition
      		Specified Condition
      Battery positive (+) → Terminal 2
      Battery negative (-) → Terminal 1
      		Set
      Battery positive (+) → Terminal 1
      Battery negative (-) → Terminal 2
      		Unset
      RHD:
      Measurement Condition
      		Specified Condition
      Battery positive (+) → Terminal 4
      Battery negative (-) → Terminal 3
      		Set
      Battery positive (+) → Terminal 3
      Battery negative (-) → Terminal 4
      		Unset

    3. While the double locking system is set, check that the doors cannot be unlocked by operating the control cable.



NG
REPLACE FRONT DOOR LOCK ASSEMBLY
OK


7.READ VALUE OF INTELLIGENT TESTER (DOUBLE DOOR LOCK POSITION SWITCH)

  1. Check the Data List for proper functioning of the double door lock position switch.

    Driver door ECU:

    Item
    		Measurement Item/Display (Range)
    		Normal Condition
    		Diagnostic Note
    Double Lock Position SW
    		Driver side double door lock position switch signal/ ON or OFF
    		ON: Driver side double door is unset
    OFF: Driver side double door is set
    		-
OK:
ON (driver side double door is unset) appears on screen.


OK
Go to step 9
NG


8.INSPECT FRONT DOOR LOCK ASSEMBLY (DRIVER SIDE) (DOUBLE DOOR LOCK POSITION SWITCH)

Lexus Gs430, Gs300. Uzs190 Grs190.Door Lock.Power Door Lock Control System.Power Door Lock Control System Double Lock Function Does Not Operate Properly

  1. Measure the resistance of the double door lock position switch.

    Standard resistance:
    LHD
    Tester Connection
    		Switch Condition
    		Specified Condition
    5 - 6
    		Set
    		Below 1 Ω
    5 - 6
    		Unset
    		10 kΩ or higher
    RHD:
    Tester Connection
    		Switch Condition
    		Specified Condition
    9 - 10
    		Set
    		Below 1 Ω
    9 - 10
    		Unset
    		10 kΩ or higher


NG
REPLACE FRONT DOOR LOCK ASSEMBLY
OK


9.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 Double Lock Function Does Not Operate Properly

  1. Disconnect the O4*1 or N3*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
    O4-5 (AI+) - O6-2 (DL)
    		Below 1 Ω
    O4-6 (AI-) - O6-1 (UNDL)
    		Below 1 Ω
    O4-3 (DBSL) - O6-6 (DLSR)
    		Below 1 Ω
    O4-4 (DBE) - O6-5 (E)
    		Below 1 Ω
    RHD:
    Tester Connection
    		Specified Condition
    N3-5 (AI+) - N6-4 (DL)
    		Below 1 Ω
    N3-6 (AI-) - N6-3 (UNDL)
    		Below 1 Ω
    N3-3 (DBSL) - N6-9 (DLSR)
    		Below 1 Ω
    N3-4 (DBE) - N6-10 (E)
    		Below 1 Ω
    HINT:
    *1: LHD
    *2: RHD


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE DRIVER DOOR ECU

10.INSPECT FRONT DOOR LOCK ASSEMBLY (PASSENGER SIDE) (DOUBLE DOOR LOCK MOTOR)

Lexus Gs430, Gs300. Uzs190 Grs190.Door Lock.Power Door Lock Control System.Power Door Lock Control System Double Lock Function Does Not Operate Properly

  1. Check operation of the double lock motor.

    1. Apply battery voltage to the door lock and set the door lock motor to the lock position.

      OK:
      LHD
      Measurement Condition
      		Specified Condition
      Battery positive (+) → Terminal 2
      Battery negative (-) → Terminal 1
      		Lock
      Battery positive (+) → Terminal 1
      Battery negative (-) → Terminal 2
      		Unlock
      RHD:
      Measurement Condition
      		Specified Condition
      Battery positive (+) → Terminal 4
      Battery negative (-) → Terminal 3
      		Lock
      Battery positive (+) → Terminal 3
      Battery negative (-) → Terminal 4
      		Unlock

    2. Apply battery voltage to the door lock motor and check the operation of the double door lock motor.

      OK :
      LHD
      Measurement Condition
      		Specified Condition
      Battery positive (+) → Terminal 4
      Battery negative (-) → Terminal 3
      		Set
      Battery positive (+) → Terminal 3
      Battery negative (-) → Terminal 4
      		Unset
      RHD:
      Measurement Condition
      		Specified Condition
      Battery positive (+) → Terminal 2
      Battery negative (-) → Terminal 1
      		Set
      Battery positive (+) → Terminal 1
      Battery negative (-) → Terminal 2
      		Unset

    3. While the double locking system is set, check that the doors cannot be unlocked by operating the control cable.



NG
REPLACE FRONT DOOR LOCK ASSEMBLY
OK


11.READ VALUE OF INTELLIGENT TESTER (DOUBLE DOOR LOCK POSITION SWITCH)

  1. Check the Data List for proper functioning the of double door lock position switch.

    Passenger door ECU:

    Item
    		Measurement Item/Display (Range)
    		Normal Condition
    		Diagnostic Note
    Double Lock Position SW
    		Passenger side double door lock position switch signal/ ON or OFF
    		ON: Passenger side double door is unset
    OFF: Passenger side double door is set
    		-
OK:
ON (passenger side double door is unset) appears on screen.


OK
Go to step 13
NG


12.INSPECT FRONT DOOR LOCK ASSEMBLY (PASSENGER SIDE) (DOUBLE DOOR LOCK POSITION SWITCH)

Lexus Gs430, Gs300. Uzs190 Grs190.Door Lock.Power Door Lock Control System.Power Door Lock Control System Double Lock Function Does Not Operate Properly

  1. Measure the resistance of the double door lock position switch.

    Standard resistance:
    LHD
    Tester Connection
    		Switch Condition
    		Specified Condition
    9 - 10
    		Set
    		Below 1 Ω
    9 - 10
    		Unset
    		10 kΩ or higher
    RHD:
    Tester Connection
    		Switch Condition
    		Specified Condition
    5 - 6
    		Set
    		Below 1 Ω
    5 - 6
    		Unset
    		10 kΩ or higher


NG
REPLACE FRONT DOOR LOCK ASSEMBLY
OK


13.CHECK WIRE HARNESS (PASSENGER DOOR ECU - FRONT DOOR LOCK ASSEMBLY)
Lexus Gs430, Gs300. Uzs190 Grs190.Door Lock.Power Door Lock Control System.Power Door Lock Control System Double Lock Function Does Not Operate Properly

  1. Disconnect the N3*1 or O4*2 ECU connector.

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

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

    Standard resistance:
    LHD
    Tester Connection
    		Specified Condition
    N3-5 (AI+) - N6-4 (DL)
    		Below 1 Ω
    N3-6 (AI-) - N6-3 (UNDL)
    		Below 1 Ω
    N3-3 (DBSL) - N6-9 (DLSR)
    		Below 1 Ω
    N3-4 (DBE) - N6-10 (E)
    		Below 1 Ω
    RHD:
    Tester Connection
    		Specified Condition
    O4-5 (AI+) - O6-2 (DL)
    		Below 1 Ω
    O4-6 (AI-) - O6-1 (UNDL)
    		Below 1 Ω
    O4-3 (DBSL) - O6-6 (DLSR)
    		Below 1 Ω
    O4-4 (DBE) - O6-5 (E)
    		Below 1 Ω
    HINT:
    *1: LHD
    *2: RHD


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE PASSENGER DOOR ECU

14.INSPECT REAR DOOR LOCK ASSEMBLY LH (DOUBLE DOOR LOCK MOTOR)
Lexus Gs430, Gs300. Uzs190 Grs190.Door Lock.Power Door Lock Control System.Power Door Lock Control System Double Lock Function Does Not Operate Properly

  1. Check operation of the double lock motor.

    1. Apply battery voltage to the door lock and set the door lock motor to the lock position.

      OK:
      Measurement Condition
      		Specified Condition
      Battery positive (+) → Terminal 4
      Battery negative (-) → Terminal 1
      		Lock
      Battery positive (+) → Terminal 1
      Battery negative (-) → Terminal 4
      		Unlock

    2. Apply battery voltage to the door lock motor and check the operation of the double door lock motor.

      OK:
      Measurement Condition
      		Specified Condition
      Battery positive (+) → Terminal 4
      Battery negative (-) → Terminal 3
      		Set
      Battery positive (+) → Terminal 3
      Battery negative (-) → Terminal 4
      		Unset

    3. While the double locking system is set, check that the doors cannot be unlocked by operating the control cable.



NG
REPLACE REAR DOOR LOCK ASSEMBLY LH
OK


15.READ VALUE OF INTELLIGENT TESTER (DOUBLE DOOR LOCK POSITION SWITCH)

  1. Check the Data List for proper functioning the of double door lock position switch.

    Rear door ECU LH:

    Item
    		Measurement Item/Display (Range)
    		Normal Condition
    		Diagnostic Note
    Double Lock Position SW
    		Rear LH side double door lock position switch signal/ ON or OFF
    		ON: Rear LH side double door is unset
    OFF: Rear LH side double door is set
    		-
OK:
ON (rear LH side double door is unset) appears on screen.


OK
Go to step 17
NG


16.INSPECT REAR DOOR LOCK ASSEMBLY LH (DOUBLE DOOR LOCK POSITION SWITCH)
Lexus Gs430, Gs300. Uzs190 Grs190.Door Lock.Power Door Lock Control System.Power Door Lock Control System Double Lock Function Does Not Operate Properly

  1. Measure the resistance of the double door lock position switch.

    Standard resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    9 - 10
    		Set
    		Below 1 Ω
    9 - 10
    		Unset
    		10 kΩ or higher


NG
REPLACE REAR DOOR LOCK ASSEMBLY LH
OK


17.CHECK WIRE HARNESS (REAR DOOR LH ECU - REAR DOOR LOCK ASSEMBLY LH)
Lexus Gs430, Gs300. Uzs190 Grs190.Door Lock.Power Door Lock Control System.Power Door Lock Control System Double Lock Function Does Not Operate Properly

  1. Disconnect the Q3 ECU connector.

  1. Disconnect the Q5 door lock connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    Q3-5 (AI+) - Q5-4 (DL)
    		Below 1 Ω
    Q3-6 (AI-) - Q5-3 (UNDL)
    		Below 1 Ω
    Q3-3 (DBSI) - Q5-9 (DLSR)
    		Below 1 Ω
    Q3-4 (DBE) - Q5-10 (E)
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE REAR DOOR ECU LH

18.INSPECT REAR DOOR LOCK ASSEMBLY RH (DOUBLE DOOR LOCK MOTOR)
Lexus Gs430, Gs300. Uzs190 Grs190.Door Lock.Power Door Lock Control System.Power Door Lock Control System Double Lock Function Does Not Operate Properly

  1. Check operation of the double lock motor.

    1. Apply battery voltage to the door lock and set the door lock motor to the lock position.

      OK:
      Measurement Condition
      		Specified Condition
      Battery positive (+) → Terminal 4
      Battery negative (-) → Terminal 3
      		Lock
      Battery positive (+) → Terminal 3
      Battery negative (-) → Terminal 4
      		Unlock

    2. Apply battery voltage to the door lock motor and check the operation of the double door lock motor.

      OK:
      Measurement Condition
      		Specified Condition
      Battery positive (+) → Terminal 2
      Battery negative (-) → Terminal 1
      		Set
      Battery positive (+) → Terminal 1
      Battery negative (-) → Terminal 2
      		Unset

    3. While the double locking system is set, check that the doors cannot be unlocked by operating the control cable.



NG
REPLACE REAR DOOR LOCK ASSEMBLY RH
OK


19.READ VALUE OF INTELLIGENT TESTER (DOUBLE DOOR LOCK POSITION SWITCH)

  1. Check the Data List for proper functioning the of double door lock position switch.

    Rear door ECU RH:

    Item
    		Measurement Item/Display (Range)
    		Normal Condition
    		Diagnostic Note
    Double Lock Position SW
    		Rear RH side double door lock position switch signal/ ON or OFF
    		ON: Rear RH side double door is unset
    OFF: Rear RH side double door is set
    		-
OK:
ON (rear RH side double door is unset) appears on screen.


OK
Go to step 21
NG


20.INSPECT REAR DOOR LOCK ASSEMBLY RH (DOUBLE DOOR LOCK POSITION SWITCH)
Lexus Gs430, Gs300. Uzs190 Grs190.Door Lock.Power Door Lock Control System.Power Door Lock Control System Double Lock Function Does Not Operate Properly

  1. Measure the resistance of the double door lock position switch.

    Standard resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    5 - 6
    		Set
    		Below 1 Ω
    5 - 6
    		Unset
    		10 kΩ or higher


NG
REPLACE REAR DOOR LOCK ASSEMBLY RH
OK


21.CHECK WIRE HARNESS (REAR DOOR RH ECU - REAR DOOR LOCK ASSEMBLY RH)
Lexus Gs430, Gs300. Uzs190 Grs190.Door Lock.Power Door Lock Control System.Power Door Lock Control System Double Lock Function Does Not Operate Properly

  1. Disconnect the P2 ECU connector.

  1. Disconnect the P5 door lock connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    P2-5 (AI+) - P5-2 (DL)
    		Below 1 Ω
    P2-6 (AI-) - P5-1 (UNDL)
    		Below 1 Ω
    P2-3 (DBSI) - P5-5 (DLSR)
    		Below 1 Ω
    P2-4 (DBE) - P5-6 (E)
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE REAR DOOR ECU RH