Theft Deterrent System (W/O Intrusion Sensor) Engine Hood Courtesy Switch Circuit

Securities. Lexus Is250, Is220D. Gse20 Ale20
Theft Deterrent. Lexus Is250, Is220D. Gse20 Ale20

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT DTC

READ VALUE OF INTELLIGENT TESTER

INSPECT ENGINE HOOD COURTESY SWITCH

CHECK HARNESS AND CONNECTOR (ENGINE ROOM R/B NO. 2 - ENGINE HOOD COURTESY SWITCH)

CHECK HARNESS AND CONNECTOR (ENGINE HOOD COURTESY SWITCH - BODY GROUND)

THEFT DETERRENT SYSTEM (w/o Intrusion Sensor) - Engine Hood Courtesy Switch Circuit


DESCRIPTION

The engine hood courtesy switch is installed together with 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 Is250, Is220D. Gse20 Ale20.Theft Deterrent.Theft Deterrent System (W/ Intrusion Sensor).Theft Deterrent System (W/O Intrusion Sensor) Engine Hood Courtesy Switch Circuit


INSPECTION PROCEDURE

1.INSPECT DTC
HINT:
Front controller sends engine hood open/close signal to main body ECU RH through the multiplex communication.

  1. Delete DTC (Click here).

  1. Check the DTC B1214.

    OK:
    No DTC is output.


NG
GO TO MULTIPLEX COMMUNICATION SYSTEM
OK


2.READ VALUE OF INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the intelligent tester main switch on.

  1. Select the item below in the Data list and read the display on the tester.

    Body No. 5 (Front controller):
    Item
    		Test Details
    		Diagnostic Note
    Hood Courtesy Switch
    		Engine hood courtesy switch signal ON/OFF
    		-
    OK:
    The indicator on the tester switches between ON and OFF in accordance with the engine hood courtesy switch status.


NG
Go to step 3
OK

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

3.INSPECT ENGINE HOOD COURTESY SWITCH


    Lexus Is250, Is220D. Gse20 Ale20.Theft Deterrent.Theft Deterrent System (W/ Intrusion Sensor).Theft Deterrent System (W/O Intrusion Sensor) Engine Hood Courtesy Switch Circuit

  1. Remove the courtesy switch from the hood lock.

  1. Disconnect the 2G R/B connector.

  1. Measure the resistance according to the value(s) in the table below.

Standard resistance:
Tester Connection
Switch Position
Specified Condition
1 - 2
Free (OFF)
10 kΩ or higher
Pushed (ON)
Below 1 Ω


NG
REPLACE HOOD LOCK ASSEMBLY
OK


4.CHECK HARNESS AND CONNECTOR (ENGINE ROOM R/B NO. 2 - ENGINE HOOD COURTESY SWITCH)


    Lexus Is250, Is220D. Gse20 Ale20.Theft Deterrent.Theft Deterrent System (W/ Intrusion Sensor).Theft Deterrent System (W/O Intrusion Sensor) Engine Hood Courtesy Switch Circuit

  1. Disconnect the 2G R/B connector and B8 switch connector.

  1. Measure the resistance according to the value(s) in the table below.

Standard resistance:
Tester Connection
Specified Condition
2G-3 - B8-2
Below 1 Ω
2G-3 or B8-2 - Body ground
10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.CHECK HARNESS AND CONNECTOR (ENGINE HOOD COURTESY SWITCH - BODY GROUND)


    Lexus Is250, Is220D. Gse20 Ale20.Theft Deterrent.Theft Deterrent System (W/ Intrusion Sensor).Theft Deterrent System (W/O Intrusion Sensor) Engine Hood Courtesy Switch Circuit

  1. Measure the resistance according to the value(s) in the table below.

Standard resistance:
Tester Connection
Specified Condition
B8-1 - Body ground
Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE