Theft Deterrent System (For Sedan) Engine Hood Courtesy Switch Circuit

Vehicle Interior. Yaris. Ncp93, 131
Theft Deterrent Keyless Entry. Yaris. Ncp93, 131

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING TECHSTREAM (ENGINE HOOD COURTESY SWITCH)

INSPECT HOOD LOCK ASSEMBLY (ENGINE HOOD COURTESY SWITCH)

CHECK HARNESS AND CONNECTOR (THEFT WARNING ECU ASSEMBLY - ENGINE HOOD COURTESY SWITCH)

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

THEFT DETERRENT SYSTEM (for Sedan) - Engine Hood Courtesy Switch Circuit


DESCRIPTION

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

WIRING DIAGRAM


Yaris. Ncp93, 131.Theft Deterrent Keyless Entry.Engine Immobiliser System (For Sedan).Theft Deterrent System (For Sedan) Engine Hood Courtesy Switch Circuit


INSPECTION PROCEDURE

1.READ VALUE USING TECHSTREAM (ENGINE HOOD COURTESY SWITCH)

  1. Connect the Techstream to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the tester ON.

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

    Theft Warning ECU:

    Item
    		Measurement Item/Display (Range)
    		Normal Condition
    		Diagnostic Note
    Hood Courtesy Switch
    		Engine hood courtesy switch signal/ON or OFF
    		ON: Engine hood is OPEN
    OFF: Engine hood is CLOSED
    		-


NG
Go to step 2
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

2.INSPECT HOOD LOCK ASSEMBLY (ENGINE HOOD COURTESY SWITCH)


    Yaris. Ncp93, 131.Theft Deterrent Keyless Entry.Engine Immobiliser System (For Sedan).Theft Deterrent System (For Sedan) Engine Hood Courtesy Switch Circuit

  1. Disconnect the A18 courtesy switch connector.

  1. Check the resistance of the engine hood courtesy switch.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1 - 2
    		Lock
    (OFF)
    		10 kΩ or higher
    1 - 2
    		Unlock
    (ON)
    		Below 1 Ω

  1. Reconnect the courtesy switch connector.



NG
REPLACE HOOD LOCK ASSEMBLY (YARIS_NCP93 RM000000Y55080X.html)
OK


3.CHECK HARNESS AND CONNECTOR (THEFT WARNING ECU ASSEMBLY - ENGINE HOOD COURTESY SWITCH)


    Yaris. Ncp93, 131.Theft Deterrent Keyless Entry.Engine Immobiliser System (For Sedan).Theft Deterrent System (For Sedan) Engine Hood Courtesy Switch Circuit

  1. Disconnect the D26 theft warning ECU and A18 engine hood courtesy switch connectors.

  1. Measure the resistance.

    Standard resistance:
    Tester Connection
    		Specified Condition
    D26-4 (DSWH) - A18-2 (CTYH)
    		Below 1 Ω
    D26-4 (DSWH) - Body ground
    		10 kΩ or higher

  1. Reconnect the theft warning ECU and engine hood courtesy switch connectors.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


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

  1. Disconnect the A18 engine hood courtesy switch connector.



    Yaris. Ncp93, 131.Theft Deterrent Keyless Entry.Engine Immobiliser System (For Sedan).Theft Deterrent System (For Sedan) Engine Hood Courtesy Switch Circuit

  1. Measure the resistance.

    Standard resistance:
    Tester Connection
    		Specified Condition
    A18-1 (GND) - Body ground
    		Below 1 Ω

  1. Reconnect the engine hood courtesy switch connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE THEFT WARNING ECU ASSEMBLY (YARIS_NCP93 RM0000033J4009X.html)