THEFT DETERRENT SYSTEM Unlock Warning Switch Circuit

DESCRIPTION

The key unlock warning switch assembly comes on when the ignition key is inserted into the ignition key cylinder and goes off when the ignition key is removed.

WIRING DIAGRAM

A001UQEE01
*a Unlock Warning Switch Assembly
*b Instrument Panel Junction Block Assembly
*c Main Body ECU (Multiplex Network Body ECU)

PROCEDURE


  1. READ VALUE USING GTS (KEY UNLOCK WARNING SW)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Main Body / Data List.

    5. According to the display on the GTS, read the Data List.


      Body Electrical > Main Body > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Key Unlock Warning SW Unlock warning switch ON or OFF

      ON: Key is inserted into ignition key cylinder

      OFF: Key is removed from ignition key cylinder

      		 -

      Body Electrical > Main Body > Data List
      Tester Display
      Key Unlock Warning SW
      OK
      When the key is in the ignition key cylinder, "ON" appears on the screen.
      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

  2. INSPECT UNLOCK WARNING SWITCH ASSEMBLY


    1. Remove the unlock warning switch assembly.

      Click here

    2. Inspect the unlock warning switch assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE UNLOCK WARNING SWITCH ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - UNLOCK WARNING SWITCH ASSEMBLY - BODY GROUND)


    1. Disconnect the 3A instrument panel junction block assembly connector.

    2. Disconnect the F13 unlock warning switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3A-41 - F13-1 (UN+) Always Below 1 Ω
      3A-41 or F13-1 (UN+) - Body ground Always 10 kΩ or higher
      F13-2 (UN-) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Remove the main body ECU (multiplex network body ECU).


      A001VHHC02
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -

    2. Disconnect the 3A instrument panel junction block assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3A-41 - MB-3 (KSW) Always Below 1 Ω
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG (for LHD) C
      NG (for RHD) D

    A

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    B

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    C

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    D

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here