IMMOBILISER SYSTEM Security Indicator Light Does not Blink

DESCRIPTION


WIRING DIAGRAM

A01WQ16E10
*1 Main Body ECU (Multiplex Network Body ECU)
*2 Security Indicator Light (Multi-Media Module Receiver Assembly)
*3 Certification ECU (Smart Key ECU Assembly)
*4 CAN Communication Line

CAUTION / NOTICE / HINT

Note


  • The engine immobiliser system uses the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the engine immobiliser system after confirming that the communication systems are functioning properly Click here.

  • When using the GTS with the engine switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

  • Before replacing the certification ECU (smart key ECU assembly) or main body ECU (multiplex network body ECU), refer to Service Bulletin.

PROCEDURE


  1. CHECK FOR DTC


    1. Check for DTCs Click here.

      OK
      DTCs are not output.

    NG

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    OK

  2. PERFORM ACTIVE TEST USING GTS (IMMOBILISERINDICATOR)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Entry&Start / Active Test.

    5. Perform the Active Test according to the display on the GTS.

      Entry&Start
      Tester Display Test Part Control Range Diagnostic Note
      Immobiliser Indicator Security indicator light OFF/ON -
      OK
      The security indicator light (multi-media module receiver assembly) operates normally.

    NG

    CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] - SECURITY INDICATOR LIGHT AND BODY GROUND) Click here

    OK

  3. CHECK SECURITY INDICATOR LIGHT (MULTI-MEDIA MODULE RECEIVER ASSEMBLY) OPERATION


    1. When the immobiliser is set, check that the security indicator light (multi-media module receiver assembly) blinks*1.

      OK
      The security indicator light (multi-media module receiver assembly) blinks normally.

    2. When the theft deterrent system is in the arming preparation state, check that the security indicator light (multi-media module receiver assembly) illuminates*2.

      OK
      The security indicator light (multi-media module receiver assembly) illuminates normally.
      Result
      Result Proceed to
      *1 is NG (*2 is OK) A
      *2 is NG (*1 is OK) (for LHD) B
      *2 is NG (*1 is OK) (for RHD) C

    A

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    B

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

    C

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

  4. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] - SECURITY INDICATOR LIGHT AND BODY GROUND)


    1. Disconnect the E151 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the F76 security indicator light (multi-media module receiver assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E151-19 (IND) - F76-37 (SEUC) Always Below 1 Ω
      E151-19 (IND) or F76-37 (SEUC) - Body ground Always 10 kΩ or higher
      F76-12 (GND1) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. Connect the E151 certification ECU (smart key ECU assembly) connector.

      A01WPV1E01
      Text in Illustration
      *a

      Component with harness connected

      (Certification ECU [Smart Key ECU Assembly])

      		 - -

    2. Connect the F76 security indicator light (multi-media module receiver assembly) connector.

    3. Using an oscilloscope, check the waveform.

      Measurement Condition
      Tester Connection Condition Specified Condition
      E151-19 (IND) - Body ground Engine switch off → on (IG) Pulse generation → Below 2 V

    OK

    REPLACE SECURITY INDICATOR LIGHT (MULTI-MEDIA MODULE RECEIVER ASSEMBLY) Click here

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)