THEFT DETERRENT SYSTEM (w/o Smart Entry and Start System) Unlock Warning Switch Circuit

DESCRIPTION

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

The main body ECU (driver side junction block assembly) operates the key confinement prevention function while the key unlock warning switch assembly is on.

WIRING DIAGRAM

A01ELDRE03

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Select the item below in the Data List and then read the display on the GTS.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Key Unlock Warning SW Unlock warning switch signal/ON or OFF

      ON: Key inserted into ignition key cylinder

      OFF: Key removed from ignition key cylinder

      		 -
      OK
      When the key is in the ignition key cylinder, ON appears on the GTS.

    NG

    INSPECT UNLOCK WARNING SWITCH ASSEMBLY Click here

    OK

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

  2. INSPECT UNLOCK WARNING SWITCH ASSEMBLY


    1. A01EMB9E08
      Text in Illustration
      *1

      Component without harness connected

      (Unlock Warning Switch Assembly)

      Remove the unlock warning switch assembly Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D24-1 (UN+) - D24-2 (UN-)

      Free

      (Key removed)

      		 10 kΩ or higher
      D24-1 (UN+) - D24-2 (UN-)

      Pushed

      (Key set)

      		 Below 1 Ω

    NG

    REPLACE UNLOCK WARNING SWITCH ASSEMBLY Click here

    OK

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


    1. A01EL34E05
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Unlock Warning Switch Assembly)

      Disconnect the D24 unlock warning switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D24-2 (UN-) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A01ELXUE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Main Body ECU (Driver Side Junction Block Assembly))
      *2

      Front view of wire harness connector

      (to Unlock Warning Switch Assembly)

      Disconnect the D51 main body ECU (driver side junction block assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D24-1 (UN+) - D51-5 (KSW) Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY) Click here