Theft Deterrent System Ecu Power Source Circuit

Securities. Lexus Gs430, Gs300. Uzs190 Grs190
Theft Deterrent. Lexus Gs430, Gs300. Uzs190 Grs190

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT FUSE (D/C CUT, MPX-B)

CHECK WIRE HARNESS (COWL SIDE JUNCTION BLOCK RH - BATTERY AND BODY GROUND)

THEFT DETERRENT SYSTEM - ECU Power Source Circuit


DESCRIPTION

  1. This circuit provides power to operate the cowl side junction block (multiplex network body ECU).

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.Theft Deterrent.Theft Deterrent System.Theft Deterrent System Ecu Power Source Circuit


INSPECTION PROCEDURE

1.INSPECT FUSE (D/C CUT, MPX-B)

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

  1. Measure the resistance of the fuses.

    Standard resistance:
    Below 1 Ω


NG
REPLACE FUSE
OK


2.CHECK WIRE HARNESS (COWL SIDE JUNCTION BLOCK RH - BATTERY AND BODY GROUND)
Lexus Gs430, Gs300. Uzs190 Grs190.Theft Deterrent.Theft Deterrent System.Theft Deterrent System Ecu Power Source Circuit

  1. Disconnect the DD and DK junction block connectors.

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

    Standard voltage:
    Tester Connection
    		Specified Condition
    DK-5 (BECU) - Body ground
    		10 to 14 V
    Standard resistance:
    Tester Connection
    		Specified Condition
    DD-7 (GND2) - Body ground
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

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