THEFT DETERRENT SYSTEM Unlock Warning Switch Circuit

DESCRIPTION

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

WIRING DIAGRAM

A018JKOE01
*a Unlock Warning Switch Assembly
*b Instrument Panel Junction Block Assembly
*c Main Body ECU (Multiplex Network Body ECU)

CAUTION / NOTICE / HINT

Note


  • As the door control battery is installed between the vehicle battery and main body ECU (multiplex network body ECU), first perform the inspections in On-Vehicle Inspection to confirm that there are no malfunctions in the power source circuit for the main body ECU (multiplex network body ECU) before performing this troubleshooting procedure.*

    Click here


    • *: for LHD

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. Read the Data List according to the display on the GTS.


      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 inserted into ignition key cylinder

      OFF: Key removed from ignition key cylinder

      		 -

      Body Electrical > Main Body > Data List
      Tester Display
      Key Unlock Warning SW
      OK
      The GTS display changes correctly in response to the unlock warning switch assembly status.
      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. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


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

      Click here

      A018KPMC01
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -

    2. Disconnect the 4D 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
      4D-28 - MB-3 (KSW) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    OK

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


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      4D-28 - F52-1 Always Below 1 Ω
      4D-28 or F52-1 - Body ground Always 10 kΩ or higher
      F52-2 - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR