Theft Deterrent System (For Sedan) Unlock Warning Switch Circuit

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR DTC

READ VALUE USING TECHSTREAM (UNLOCK WARNING SWITCH)

INSPECT UNLOCK WARNING SWITCH ASSEMBLY

CHECK HARNESS AND CONNECTOR (THEFT WARNING ECU ASSEMBLY - UNLOCK WARNING SWITCH ASSEMBLY)

CHECK HARNESS AND CONNECTOR (UNLOCK WARNING SWITCH ASSEMBLY - BODY GROUND)

THEFT DETERRENT SYSTEM (for Sedan) - Unlock Warning Switch Circuit


DESCRIPTION

The key unlock warning switch comes on when the ignition key is inserted into the ignition key cylinder and goes off when the ignition key is removed.
The theft warning ECU operates the key confinement prevention function while the key unlock warning switch is on.

WIRING DIAGRAM


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


INSPECTION PROCEDURE

1.CHECK FOR DTC

  1. Connect the Techstream to the DLC3.

  1. Turn the ignition switch to ON and turn the tester ON.

  1. Clear the DTCs.

  1. Check whether DTC B1269 recurs 10 seconds or more after the ignition switch is turned ON.

    OK:
    No DTC is output.


NG
GO TO DTC CHART
OK


2.READ VALUE USING TECHSTREAM (UNLOCK WARNING SWITCH)

  1. Connect the Techstream to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the tester main switch ON.

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

    Theft Warning ECU:

    Item
    		Measurement Item/Display (Range)
    		Normal Condition
    		Diagnostic Note
    Key SW
    		Unlock warning switch signal ON/OFF
    		ON: Key is inserted into ignition key cylinder
    OFF: Key is removed from ignition key cylinder
    		-
    OK:
    When the key is in the ignition key cylinder, "ON" appears on the screen.


NG
Go to step 3
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

3.INSPECT UNLOCK WARNING SWITCH ASSEMBLY


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

  1. Remove the unlock warning switch assembly.

  1. Measure the resistance.

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

  1. Reinstall the unlock warning switch assembly.



NG
REPLACE UNLOCK WARNING SWITCH ASSEMBLY (YARIS_NCP93 RM000001GD401DX.html)
OK


4.CHECK HARNESS AND CONNECTOR (THEFT WARNING ECU ASSEMBLY - UNLOCK WARNING SWITCH ASSEMBLY)


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

  1. Disconnect the D26 theft warning ECU and the D19 unlock warning switch connectors.

  1. Measure the resistance.

    Standard resistance:
    Tester Connection
    		Specified Condition
    D26-7 (KSW) - (D19-1)
    		Below 1 Ω
    D26-7 (KSW) - Body ground
    		10 kΩ or higher

  1. Reconnect the theft warning ECU and the unlock warning switch connectors.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.CHECK HARNESS AND CONNECTOR (UNLOCK WARNING SWITCH ASSEMBLY - BODY GROUND)

  1. Disconnect the D19 unlock warning switch connector.



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

  1. Measure the resistance.

    Standard resistance:
    Tester Connection
    		Specified Condition
    D19-2 - Body ground
    		Below 1 Ω

  1. Reconnect the unlock warning switch connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE THEFT WARNING ECU ASSEMBLY (YARIS_NCP93 RM0000033J4009X.html)