Theft Deterrent System Engine Hood Courtesy Switch Circuit

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ DATA LIST USING INTELLIGENT TESTER (ENGINE HOOD COURTESY SWITCH)

INSPECT ENGINE HOOD COURTESY SWITCH

CHECK WIRE HARNESS (ENGINE ROOM NO. 2 RELAY BLOCK, JUNCTION BLOCK - ENGINE HOOD COURTESY SWITCH AND BODY GROUND)

THEFT DETERRENT SYSTEM - Engine Hood Courtesy Switch Circuit


DESCRIPTION

  1. The engine hood courtesy switch is built into the hood lock. This switch turns on when the engine hood is opened and turns off when the engine hood is closed.

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.Theft Deterrent.Theft Deterrent System.Theft Deterrent System Engine Hood Courtesy Switch Circuit


INSPECTION PROCEDURE

1.READ DATA LIST USING INTELLIGENT TESTER (ENGINE HOOD COURTESY SWITCH)

  1. Check the Data List for proper functioning of the engine hood courtesy switch.

    Engine room No. 2 relay block, junction block (front controller):
    Item
    		Measurement Item/ Display (Range)
    		Normal Condition
    		Diagnostic Note
    Hood Courtesy SW
    		Hood courtesy switch/
    ON or OFF
    		ON: Engine hood is open
    OFF: Engine hood is closed
    		-
    OK:
    ON (engine hood is open) appears on screen.


NG
Go to step 2
OK

REPLACE ENGINE ROOM NO. 2 RELAY BLOCK, JUNCTION BLOCK (FRONT CONTROLLER)

2.INSPECT ENGINE HOOD COURTESY SWITCH
Lexus Gs430, Gs300. Uzs190 Grs190.Theft Deterrent.Theft Deterrent System.Theft Deterrent System Engine Hood Courtesy Switch Circuit

  1. Remove the courtesy switch from the hood lock.

  1. Measure the resistance of the switch.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1 - 2
    		Pushed (ON)
    		Below 1 Ω
    1 - 2
    		Not pushed (OFF)
    		10 kΩ or higher


NG
REPLACE ENGINE HOOD COURTESY SWITCH
OK


3.CHECK WIRE HARNESS (ENGINE ROOM NO. 2 RELAY BLOCK, JUNCTION BLOCK - ENGINE HOOD COURTESY SWITCH AND BODY GROUND)
Lexus Gs430, Gs300. Uzs190 Grs190.Theft Deterrent.Theft Deterrent System.Theft Deterrent System Engine Hood Courtesy Switch Circuit

  1. Disconnect the 2G junction block connector.

  1. Disconnect the B7 switch connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    2G-3 - B7-2
    		Below 1 Ω
    B7-1 - Body ground
    		Below 1 Ω
    2G-3 or B7-2 - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION IN PROBLEM SYMPTOMS TABLE