Entry And Start System Entry Unlock Function Does Not Operate On Rear Door Lh

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK MANUAL DOOR UNLOCK OPERATION

READ DATA LIST (DOOR COURTESY LIGHT SWITCH)

READ DATA LIST (LOCK POSITION SWITCH)

PERFORM ACTIVE TEST (REAR LH SIDE SELECT)

READ DATA LIST (REAR LH SIDE TOUCH SENSOR)

CHECK OPERATION OF MULTIPLEX NETWORK DOOR ECU REAR LH

CHECK DOOR ELECTRICAL KEY OSCILLATOR REAR LH

CHECK WIRE HARNESS (DOOR ELECTRICAL KEY OSCILLATOR REAR LH - DOOR ELECTRICAL KEY ANTENNA REAR LH)

CHECK WIRE HARNESS (ECU - OSCILLATOR)

ENTRY AND START SYSTEM - Entry Unlock Function does not Operate on Rear Door LH


DESCRIPTION

When an ID code from the door electrical key oscillator rear LH matches an ID code from the key, the multiplex network door ECU rear LH (rear door ECU LH) outputs a SEL signal (Lo when output) to the door electrical key oscillator rear LH, activates the touch sensor inside the outside door handle, and enters unlock standby mode. When the touch sensor is touched, the door electrical key oscillator rear LH sends a SENS signal (Lo when output) to the multiplex network door ECU rear LH (rear door ECU LH) and the multiplex network door ECU rear LH (rear door ECU LH) sends an unlock signal to the rear door LH lock.

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.Door Lock.Power Door Lock Control System.Entry And Start System Entry Unlock Function Does Not Operate On Rear Door Lh


INSPECTION PROCEDURE

1.CHECK MANUAL DOOR UNLOCK OPERATION

  1. Check that the manual door unlock function operates normally.

    OK:
    Manual door unlock function operates normally.


NG
GO TO POWER DOOR LOCK CONTROL SYSTEM
OK


2.READ DATA LIST (DOOR COURTESY LIGHT SWITCH)

  1. Check the Data List for proper functioning of the rear LH side door courtesy light switch.

    Multiplex network door ECU rear LH:
    Item
    		Measurement Item / Range (Display)
    		Normal Condition
    		Diagnostic Note
    Courtesy SW
    		Courtesy light switch / ON or OFF
    		ON: Courtesy light switch is pushed
    OFF: Courtesy light switch is not pushed
    		-
    OK:
    ON (door courtesy light switch is pushed) appears on the screen.


NG
GO TO LIGHTING SYSTEM
OK


3.READ DATA LIST (LOCK POSITION SWITCH)

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

    Multiplex network door ECU rear LH:
    Item
    		Measurement Item / Range (Display)
    		Normal Condition
    		Diagnostic Note
    Lock Pos SW
    		Door unlock detection switch signal/ ON or OFF
    		ON: Door is unlocked
    OFF: Door is locked
    		-
    OK:
    ON (Door is unlocked) appears on the screen.


NG
GO TO POWER DOOR LOCK CONTROL SYSTEM
OK


4.PERFORM ACTIVE TEST (REAR LH SIDE SELECT)

  1. Select the Active Test, use the intelligent tester to generate a control command, and then check that the oscillator operates.

    Certification ECU (LHD):
    Item
    		Test Details
    		Diagnostic Note
    DR Select Sig
    		Driver side rear select ON / OFF
    		-

    Certification ECU (RHD):
    Item
    		Test Details
    		Diagnostic Note
    PR Select Sig
    		Passenger side rear select ON / OFF
    		-
    OK:
    ON (DR or PR Select Sig is ON) appears on the screen.


NG
REPLACE CERTIFICATION ECU ASSEMBLY
OK


5.READ DATA LIST (REAR LH SIDE TOUCH SENSOR)

  1. With "DR or PR Select Sig" ON, check the Data List for proper functioning of the touch sensor.

    Certification ECU (LHD):
    Item
    		Measurement Item / Range (Display)
    		Normal Condition
    		Diagnostic Note
    DR Touch Sensor
    		Driver side rear door touch sensor / ON or OFF
    		ON: Sensor is touched
    OFF: Sensor is not touched
    		-

    Certification ECU (RHD):
    Item
    		Measurement Item / Range (Display)
    		Normal Condition
    		Diagnostic Note
    PR Touch Sensor
    		Passenger side rear door touch sensor / ON or OFF
    		ON: Sensor is touched
    OFF: Sensor is not touched
    		-
    OK:
    When rear LH side is set to ON, ON (Sensor is touched) appears on the screen.


NG
Go to step 7
OK


6.CHECK OPERATION OF MULTIPLEX NETWORK DOOR ECU REAR LH

  1. After replacing the multiplex network door ECU rear LH with a normal one, check that the entry unlock function operates normally.

    OK:
    Entry unlock function operates normally.


NG
REPLACE CERTIFICATION ECU ASSEMBLY
OK

END (MULTIPLEX NETWORK DOOR ECU REAR LH IS DEFECTIVE)

7.CHECK DOOR ELECTRICAL KEY OSCILLATOR REAR LH
Lexus Gs430, Gs300. Uzs190 Grs190.Door Lock.Power Door Lock Control System.Entry And Start System Entry Unlock Function Does Not Operate On Rear Door Lh

  1. Measure the voltage of the oscillator connector.

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    4 (SEL) - Body ground
    		During Active Test
    		Below 1 V
    6 (SENS) - Body ground
    		Touch sensor is touched during Active Test
    		Below 1 V


OK
REPLACE CERTIFICATION ECU ASSEMBLY
NG


8.CHECK WIRE HARNESS (DOOR ELECTRICAL KEY OSCILLATOR REAR LH - DOOR ELECTRICAL KEY ANTENNA REAR LH)
Lexus Gs430, Gs300. Uzs190 Grs190.Door Lock.Power Door Lock Control System.Entry And Start System Entry Unlock Function Does Not Operate On Rear Door Lh

  1. Disconnect the s2 oscillator connector.

  1. Disconnect the s1 antenna connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    s2-2 (SGT) - s1-6 (SGT2)
    		Below 1 Ω
    s2-3 (ANT1) - s1-5 (ANT1)
    		Below 1 Ω
    s2-8 (ANT2) - s1-2 (ANT2)
    		Below 1 Ω
    s2-9 (TRG-) - s1-1 (TRG-)
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


9.CHECK WIRE HARNESS (ECU - OSCILLATOR)
Lexus Gs430, Gs300. Uzs190 Grs190.Door Lock.Power Door Lock Control System.Entry And Start System Entry Unlock Function Does Not Operate On Rear Door Lh

  1. Disconnect the V33 ECU connector.

  1. Disconnect the s2 oscillator connector.

  1. Measure the resistance of the wire harness connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    V33-1 (SEL3)*1 - s2-4 (SEL)
    V33-2 (SEL4)*2 - s2-4 (SEL)
    		Below 1 Ω
    V33-28 (SEN3)*1 - s2-6 (SENS)
    V33-27 (SEN4)*2 - s2-6 (SENS)
    		Below 1 Ω
    V33-8 (CLG3)*1 - s2-10 (CLG)
    V33-10 (CLG4)*2 - s2-10 (CLG)
    		Below 1 Ω
    V33-9 (CG3B)*1 - s2-5 (CLGB)
    V33-11 (CG4B)*2 - s2-5 (CLGB)
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE ELECTRICAL KEY OSCILLATOR REAR LH