ENGINE IMMOBILISER SYSTEM Security Indicator Light Does not Blink

DESCRIPTION


WIRING DIAGRAM

A01DVMOE02

INSPECTION PROCEDURE

Note


  • When replacing the transponder key ECU assembly, refer to Registration.

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. CHECK FOR DTC


    1. Check for DTCs Click here.

      OK
      DTC is not output.

    NG

    Go to DIAGNOSTIC TROUBLE CODE CHART Click here

    OK

  2. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (SECURITY INDICATOR LIGHT)


    1. Check that the security indicator light assembly illuminates when operating it with the Active Test Click here.

      Immobiliser
      Tester Display Test Part Control Range Diagnostic Note
      Security Indicator Security indicator light ON/OFF

      The test is possible when the following condition is met:


      • The key is in the ignition key cylinder.
      OK
      Security indicator light assembly can be turned on and off using the intelligent tester.

    NG

    CHECK HARNESS AND CONNECTOR (SECURITY INDICATOR LIGHT - TRANSPONDER KEY ECU AND BODY GROUND) Click here

    OK

  3. READ VALUE USING INTELLIGENT TESTER (ENGINE IMMOBILISER SYSTEM STATUS)


    1. Turn the ignition switch off.

      Tech Tips

      When using the intelligent tester with the ignition switch off to troubleshoot: Connect the intelligent tester to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds until communication between the intelligent tester and vehicle begins.

    2. Using the intelligent tester, read the Data List Click here.

      Immobiliser
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Immobiliser Engine immobiliser system status determined by transponder key ECU assembly / Set or Unset

      Set: Engine immobiliser set (engine start prohibited [no key in ignition key cylinder])

      Unset: Engine immobiliser unset (engine start permitted [key inserted in ignition key cylinder])

      		 When the engine immobiliser system does not change to the unset state, this item can be used to determine if the cause is the transponder key ECU assembly.
      OK
      Set (the key is not inserted in the ignition key cylinder) and Unset (the key is inserted in the ignition key cylinder) appear on the screen according to the key insertion condition.

    NG

    CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - BATTERY AND BODY GROUND) Click here

    OK

    REPLACE TRANSPONDER KEY ECU ASSEMBLY

  4. CHECK HARNESS AND CONNECTOR (SECURITY INDICATOR LIGHT - TRANSPONDER KEY ECU AND BODY GROUND)


    1. Disconnect the S10 security indicator light assembly connector.

    2. Disconnect the T21 transponder key ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      S10-2 - T21-8 (IND) Always Below 1 Ω
      S10-1 - Body ground Always Below 1 Ω
      S10-2 or T21-8 (IND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. REPLACE SECURITY INDICATOR LIGHT ASSEMBLY


    1. Temporarily replace the security indicator light assembly with a new or normally functioning one Click here.


    NEXT

  6. CHECK SECURITY INDICATOR LIGHT ASSEMBLY


    1. When the immobiliser is set (the ignition switch is off), check that the security indicator light assembly blinks.

      OK
      Security indicator light assembly blinks.

    NG

    REPLACE TRANSPONDER KEY ECU ASSEMBLY

    OK

    END (SECURITY INDICATOR LIGHT IS DEFECTIVE)

  7. CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - BATTERY AND BODY GROUND)


    1. A01DWN9E05
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Transponder Key ECU Assembly)

      Disconnect the T21 transponder key ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      T21-16 (GND) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      T21-1 (+B) - Body ground Always 11 to 14 V
      T21-2 (IG) - Body ground Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE TRANSPONDER KEY ECU ASSEMBLY