ENGINE IMMOBILISER SYSTEM(w/ Entry and Start System) Security Indicator Light Does not Blink

DESCRIPTION


WIRING DIAGRAM

A005HNHE02

CAUTION / NOTICE / HINT

Note


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

  • Before replacing the certification ECU (smart key ECU assembly), refer to the Service Bulletin.

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 theft warning indicator light assembly illuminates when operating it with the Active Test Click here.

      Entry&Start
      Tester Display Test Part Control Range Diagnostic Note
      Immobiliser Indicator Security indicator light ON/OFF -
      OK
      Theft warning indicator light assembly can be turned on and off using intelligent tester.

    NG

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

    OK

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


    1. Turn the engine switch off.

      Tech Tips

      When using the intelligent tester with the engine 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.

      Entry&Start
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Immobiliser Engine immobiliser system status determined by certification ECU (smart key ECU assembly) / Set or Unset

      Set: Engine immobiliser set (engine start prohibited) (engine switch off)

      Unset: Engine immobiliser unset (engine start permitted) [engine switch on (ACC) or on (IG)]

      		 When the engine immobiliser system does not change to the unset state, this item can be used to determine if the cause is the certification ECU (smart key ECU assembly).
      OK
      "Set" appears on screen.

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

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

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


    1. Disconnect the F56 theft warning indicator light assembly connector.

    2. Disconnect the F63 certification ECU (smart key ECU assembly) connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      F56-2 - F63-18 (IND) Always Below 1 Ω
      F56-6 - Body ground Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      F56-2 or F63-18 (IND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT THEFT WARNING INDICATOR LIGHT ASSEMBLY


    1. A005H3BE01
      Text in Illustration
      *a

      Component without harness connected

      (Theft Warning Indicator Light Assembly)

      Remove the theft warning indicator light assembly.

    2. Apply battery voltage to the theft warning indicator light assembly and check that the illumination comes on.

      OK
      Measurement Connection Specified Condition

      Battery positive (+) → Terminal 2

      Battery negative (-) → Terminal 6

      		 Illumination comes on

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    REPLACE THEFT WARNING INDICATOR LIGHT ASSEMBLY

  6. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BATTERY AND BODY GROUND)


    1. A005K6ZE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Certification ECU [Smart Key ECU Assembly])

      Disconnect the F63 and F65 certification ECU (smart key ECU assembly) connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F65-11 (E) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      F65-2 (+B) - Body ground Always 11 to 14 V
      F63-5 (IG) - Body ground Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      F65-10 (CUTB) - Body ground Always 11 to 14 V

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR