IMMOBILISER SYSTEM Security Indicator Light Does not Blink

DTC Code DTC Name
Security Indicator Light Does not Blink

DESCRIPTION

  • The certification ECU (smart key ECU assembly) blinks the security indicator light when the immobiliser is set (power switch off, or driver door is opened and closed with power switch on [IG]).

  • w/ Theft Deterrent System:

    The certification ECU (smart key ECU assembly) receives the security indicator light signal from the main body ECU (multiplex network body ECU) via CAN communication when the theft deterrent system is in the arming preparation state or alarm sounding state. Then, the certification ECU (smart key ECU assembly) blinks the security indicator light.

WIRING DIAGRAM

B278947E23

CAUTION / NOTICE / HINT

Note:

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

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

    Click here

  • When replacing the main body ECU (multiplex network body ECU), make sure to replace it with a new one.

PROCEDURE

  1. PERFORM ACTIVE TEST USING GTS (IMMOBILISER INDICATOR)

    1. Connect the GTS to the DLC3.

    2. Turn the power 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.

      Body Electrical > Entry&Start > Active Test

      Tester Display

      Measurement Item

      Control Range

      Diagnostic Note

      Immobiliser Indicator

      Security indicator light

      OFF or ON

      -

      Body Electrical > Entry&Start > Active Test

      Tester Display

      Immobiliser Indicator

      OK

      The security indicator light operates normally.

    Result

    Proceed to

    OK

    NG
    NG

    CHECK HARNESS AND CONNECTOR (SECURITY INDICATOR LIGHT - CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] AND BODY GROUND)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 illuminates.*2

      OK

      The security indicator light is on.

    Result

    Proceed to

    *1 is NG (*2 is OK)

    *2 is NG (*1 is OK) (for LHD)

    *2 is NG (*1 is OK) (for RHD)
    *1 is NG (*2 is OK)

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    *2 is NG (*1 is OK) (for LHD)

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    Click here

    *2 is NG (*1 is OK) (for RHD)

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    Click here

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

    1. Disconnect the G43 security indicator light (telltale light assembly) connector.

    2. Disconnect the G84 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

      G84-18 (IND) - G43-21 (LP)

      Always

      Below 1 Ω

      G43-13 (E) - Body ground

      Always

      Below 1 Ω

      G84-18 (IND) - Body ground

      Always

      10 kΩ or higher

      G43-21 (LP) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    1. Disconnect the G43 security indicator light (telltale light assembly) connector.

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      G43-21 (LP) - Body ground

      Power switch off → power switch on (IG)

      Pulse generation → Below 2 V

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE SECURITY INDICATOR LIGHT (TELLTALE LIGHT ASSEMBLY)

    Click here

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)