Wireless Door Lock Control System Only Wireless Control Function Is Inoperative

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

SYSTEM DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK WIRELESS DOOR LOCK

CHECK THAT TRANSMITTER LED ILLUMINATES

CHECK WIRELESS DOOR LOCK CONTROL FUNCTIONS (STANDARD OPERATION)

REPLACE TRANSMITTER BATTERY

CHECK CERTIFICATION ECU ASSEMBLY

CHECK WIRE HARNESS (CERTIFICATION ECU - DOOR CONTROL RECEIVER AND BODY GROUND)

CHECK DOOR CONTROL RECEIVER (OUTPUT)

WIRELESS DOOR LOCK CONTROL SYSTEM - Only Wireless Control Function is inoperative


SYSTEM DESCRIPTION

The door control receiver receives a signal from the transmitter and send signals to the multiplex network body ECU through the certification ECU assembly. The multiplex network body ECU then controls all doors by sending LOCK/UNLOCK signals to each door ECU, hazard flasher relay operation signals to the turn signals flasher relay (hazard warning lights) and wireless door lock buzzer sound signals to the wireless door lock buzzer.

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.Door Lock.Power Door Lock Control System.Wireless Door Lock Control System Only Wireless Control Function Is Inoperative


INSPECTION PROCEDURE

1.CHECK WIRELESS DOOR LOCK


NG
Go to step 2
OK

END

2.CHECK THAT TRANSMITTER LED ILLUMINATES

  1. Check that the transmitter's LED illuminates 3 times when the switch is pressed 3 times.

    OK:
    Transmitter's LED illuminates 3 times when the switch is pressed 3 times.


NG
Go to step 4
OK


3.CHECK WIRELESS DOOR LOCK CONTROL FUNCTIONS (STANDARD OPERATION)

  1. Check standard LOCK/UNLOCK switch operation.

    NOTICE:
    Standardized test procedure: press the transmitter switch for 1 second, directing the beam to the driver side door outside handle from a distance of 1 m (3.28 ft). The transmitter should be pointed directly at the handle, i.e. at a 90° angle to the vehicle body.


NG
Go to step 5
OK

REPLACE DOOR CONTROL RECEIVER

4.REPLACE TRANSMITTER BATTERY

  1. After replacing the transmitter battery, check that the doors can be locked and unlocked by using the transmitter LOCK/UNLOCK switch.

    OK:
    Doors can be locked and unlocked with transmitter.


NG
REPLACE DOOR CONTROL TRANSMITTER
OK

END

5.CHECK CERTIFICATION ECU ASSEMBLY

Lexus Gs430, Gs300. Uzs190 Grs190.Door Lock.Power Door Lock Control System.Wireless Door Lock Control System Only Wireless Control Function Is Inoperative

  1. Reconnect the V28 ECU connector.

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

    Standard voltage:
    Tester Connection
    		Specified Condition
    V28-29 (RCO) - Body ground
    		4.6 to 5.4 V


NG
REPLACE CERTIFICATION ECU ASSEMBLY
OK


6.CHECK WIRE HARNESS (CERTIFICATION ECU - DOOR CONTROL RECEIVER AND BODY GROUND)
Lexus Gs430, Gs300. Uzs190 Grs190.Door Lock.Power Door Lock Control System.Wireless Door Lock Control System Only Wireless Control Function Is Inoperative

  1. Disconnect the V36 receiver connector.

  1. Disconnect the V28 ECU connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    V28-39 (RSSI) - V36-5 (RSSI)
    		Below 1 Ω
    V28-38 (RDA) - V36-3 (DATA)
    		Below 1 Ω
    V28-29 (RCO) - V36-2 (+5)
    		Below 1 Ω
    V28-39 (RSSI) - Body ground
    		10 KΩ or higher
    V28-38 (RDA) - Body ground
    		10 KΩ or higher


NG
REPLACE CERTIFICATION ECU ASSEMBLY
OK


7.CHECK DOOR CONTROL RECEIVER (OUTPUT)
Lexus Gs430, Gs300. Uzs190 Grs190

  1. Reconnect the V36 receiver connector.

  1. Measure the voltage between the terminal of the connector and body ground.

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    V36-3 (DATA) - Body ground
    		Engine switch off, all doors closed and transmitter switch not pressed
    		10 to 14 V
    V36-3 (DATA) - Body ground
    		Engine switch off, all doors closed and transmitter switch pressed
    		Pulse generation


NG
REPLACE DOOR CONTROL RECEIVER
OK

REPLACE CERTIFICATION ECU ASSEMBLY