Clearance Sonar System Power Source Of Clearance Warning Ecu Circuit

Body Electrical. Lexus Gs430, Gs300. Uzs190 Grs190
Park Assist Monitoring. Lexus Gs430, Gs300. Uzs190 Grs190

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT FUSE (LH-IG)

INSPECT CLEARANCE WARNING ECU (IG TERMINAL VOLTAGE)

CHECK WIRE HARNESS (CLEARANCE WARNING ECU - BODY GROUND)

CLEARANCE SONAR SYSTEM - POWER SOURCE OF CLEARANCE WARNING ECU CIRCUIT


DESCRIPTION

This circuit provides power to operate the clearance warning ECU.

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.Park Assist Monitoring.Clearance Sonar System.Clearance Sonar System Power Source Of Clearance Warning Ecu Circuit


INSPECTION PROCEDURE

1.INSPECT FUSE (LH-IG)

  1. Remove the LH-IG fuse from the cowl side junction block LH.

  1. Measure the resistance of the LH-IG fuse.

    Standard resistance:
    Below 1 Ω


NG
REPLACE LH-IG FUSE
OK


2.INSPECT CLEARANCE WARNING ECU (IG TERMINAL VOLTAGE)
Lexus Gs430, Gs300. Uzs190 Grs190.Park Assist Monitoring.Clearance Sonar System.Clearance Sonar System Power Source Of Clearance Warning Ecu Circuit

  1. Disconnect the A40 ECU connector.

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

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    A40-8 (IG) - Body ground
    		Engine switch on (IG)
    		10 to 14 V


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - BATTERY)
OK


3.CHECK WIRE HARNESS (CLEARANCE WARNING ECU - BODY GROUND)
Lexus Gs430, Gs300. Uzs190 Grs190.Park Assist Monitoring.Clearance Sonar System.Clearance Sonar System Power Source Of Clearance Warning Ecu Circuit

  1. Disconnect the A40 ECU connector.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A40-27 (E) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE CLEARANCE WARNING ECU