ENGINE IMMOBILISER SYSTEM (w/ Smart Key System) Security Indicator Light Does not Blink

DESCRIPTION

WIRING DIAGRAM

A011UH9E06

INSPECTION PROCEDURE

Note

  • Before replacing the certification ECU (smart key ECU assembly), refer to the Registration Click here.

  • The engine immobiliser system (w/ Smart Key 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 Key System) after confirming that the communication systems are functioning properly.

PROCEDURE

  1. PERFORM ACTIVE TEST USING TECHSTREAM (SECURITY INDICATOR LIGHT)

    1. Connect the Techstream to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the Techstream on.

    4. Enter the following menus: Body Electrical / Smart Key / Active Test.

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

      Smart Key (Certification ECU (Smart Key ECU Assembly))
      Tester Display Test Part Control Range Diagnostic Note
      Immobiliser Indicator Security indicator light OFF/ON -
      OK
      The security indicator light operates normally.
      Result
      Result Proceed to
      OK (w/ Theft Deterrent System) A
      OK (w/o Theft Deterrent System) B
      NG C
    B

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Click here

    C

    CHECK HARNESS AND CONNECTOR (SECURITY INDICATOR LIGHT (AIR CONDITIONING CONTROL ASSEMBLY) - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)) Click here

    A

  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) Click here

  3. CHECK HARNESS AND CONNECTOR (SECURITY INDICATOR LIGHT (AIR CONDITIONING CONTROL ASSEMBLY) - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

    1. Disconnect the I56 security indicator light (air conditioning control assembly) connector.

    2. Disconnect the I78 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
      I78-18 (IND)- I56-1 (LP) Always Below 1 Ω
      I78-18 (IND) - Body ground Always 10 kΩ or higher
      I56-6 (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 G28 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
      I56-1 (LP) - I56-6 (GND) Engine switch off → engine switch on (IG) Pulse generation → Below 2 V
    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Click here

    OK

    REPLACE SECURITY INDICATOR LIGHT (AIR CONDITIONING CONTROL ASSEMBLY) Click here