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

DESCRIPTION


WIRING DIAGRAM

A01ESWQE02

INSPECTION PROCEDURE

Note


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

  • The engine immobiliser system (w/ Smart Entry and Start System) uses the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting Click here. Troubleshoot the engine immobiliser system (w/ Smart Entry and Start System) after confirming that the communication systems are functioning properly.

PROCEDURE


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


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the intelligent tester on.

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

    5. Perform the Active Test according to the display on the intelligent tester.

      Entry & Start (Certification ECU (Smart Key ECU Assembly))
      Tester Display Test Part Control Range Diagnostic Note
      Immobiliser Indicator Security indicator light ON/OFF -
      OK
      The security indicator light operates normally.

    NG

    CHECK HARNESS AND CONNECTOR (SECURITY INDICATOR LIGHT (HEATER CONTROL SWITCH BOARD) - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)) Click here

    OK

  2. CHECK SECURITY INDICATOR LIGHT OPERATION


    1. When the immobiliser is set, check that the security indicator light blinks.*1

      OK
      The security indicator light blinks normally.

    2. When the theft deterrent system is in the arming preparation state, check that the security indicator light on Click here.*2

      OK
      The security indicator light is on normally.
      Result
      Result Proceed to
      *1 is NG (*2 is OK) A
      *2 is NG (*1 is OK) B

    B

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

    A

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  3. CHECK HARNESS AND CONNECTOR (SECURITY INDICATOR LIGHT (HEATER CONTROL SWITCH BOARD) - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))


    1. Disconnect the I78 security indicator light (heater control switch board) connector.

    2. Disconnect the I56 certification ECU (smart key ECU assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I56-18 (IND)- I78-1 (LP) Always Below 1 Ω
      I56-18 (IND) - Body ground Always 10 kΩ or higher
      I78-6 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. Reconnect the I56 certification ECU (smart key ECU assembly) connector.

    2. Measure the voltage and check the pulse according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      I78-1 (LP) - I78-6 (GND) Engine switch off → engine switch on (IG) Pulse generation → Below 2 V

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

    REPLACE SECURITY INDICATOR LIGHT (HEATER CONTROL SWITCH BOARD) Click here