Theft Deterrent System Engine Hood Courtesy Switch Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING INTELLIGENT TESTER (SECURITY COURTESY SWITCH)

INSPECT SECURITY COURTESY SWITCH

CHECK HARNESS AND CONNECTOR (SECURITY COURTESY SWITCH - MAIN BODY ECU AND BODY GROUND)

INSPECT SECURITY COURTESY SWITCH

CHECK HARNESS AND CONNECTOR (SECURITY COURTESY SWITCH - MAIN BODY ECU AND BODY GROUND)

THEFT DETERRENT SYSTEM - Engine Hood Courtesy Switch Circuit


DESCRIPTION

  1. The security 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


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function).Theft Deterrent System Engine Hood Courtesy Switch Circuit


INSPECTION PROCEDURE

1.READ VALUE USING INTELLIGENT TESTER (SECURITY COURTESY SWITCH)

  1. Using the intelligent tester, read the Data List (LandCruiser RM000000W0S036X.html).

    Main Body
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Hood Courtesy SW
    		Security courtesy switch /
    ON or OFF
    		ON: Engine hood open
    OFF: Engine hood closed
    		-
    OK:
    ON (engine hood open) and OFF (engine hood closed) appear on screen according to condition of engine hood.


NG
Go to step 4
OK


2.INSPECT SECURITY COURTESY SWITCH


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155

  1. Disconnect the A27 switch connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    2 - 3
    		Always
    		Below 1 Ω


NG
REPLACE SECURITY COURTESY SWITCH (LandCruiser RM000000Y550EPX.html)
OK


3.CHECK HARNESS AND CONNECTOR (SECURITY COURTESY SWITCH - MAIN BODY ECU AND BODY GROUND)

  1. Disconnect the A27 switch connector.

  1. Disconnect the G64 ECU connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A27-2 - G64-12 (HD2)
    		Always
    		Below 1 Ω
    A27-3 - Body ground
    		Always
    		Below 1 Ω
    A27-2 or G64-12 (HD2) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (LandCruiser RM000002TGC02DX.html)

4.INSPECT SECURITY COURTESY SWITCH


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155

  1. Disconnect the A27 switch connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1 - 4
    		Unlock position
    		Below 1 Ω
    1 - 4
    		Lock position
    		10 kΩ or higher


NG
REPLACE SECURITY COURTESY SWITCH (LandCruiser RM000000Y550EPX.html)
OK


5.CHECK HARNESS AND CONNECTOR (SECURITY COURTESY SWITCH - MAIN BODY ECU AND BODY GROUND)

  1. Disconnect the A27 switch connector.

  1. Remove the main body ECU (LandCruiser RM000003WBO05FX.html).

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A27-1 - A-20 (HCTY)
    		Always
    		Below 1 Ω
    A27-4 - Body ground
    		Always
    		Below 1 Ω
    A27-1 or A-20 (HCTY) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (LandCruiser RM000003WBO05FX.html)