ENGINE IMMOBILISER SYSTEM(w/ Entry and Start System) Immobiliser System does not Operate Properly

DESCRIPTION

The engine immobiliser system compares the ID code that is registered in the certification ECU (smart key ECU assembly) with the ID code of the transponder chip that is embedded in the electrical key transmitter sub-assembly.

WIRING DIAGRAM

Click here

CAUTION / NOTICE / HINT

Note


  • 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.

  • The engine immobiliser system uses the LIN 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.

  • Before replacing the ECM, ID code box (immobiliser code ECU) or certification ECU (smart key ECU assembly), refer to Service Bulletin.

  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation."

PROCEDURE


  1. CHECK FOR DTC


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      DTCs are not output (for SFI system) A
      DTCs are not output (for ECD system) B
      DTCs are output C

    B

    CHECK WHETHER ENGINE STARTS Click here

    C

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    A

  2. READ VALUE USING GTS (IMMOBILISER FUEL CUT STATUS)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Data List.

    5. Read the Data List according to the display on the GTS.

      Engine
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Immobiliser Fuel Cut Status Status of immobiliser fuel cut / ON or OFF - -
      OK
      The item in the Data List indicates "OFF".
      Result Proceed to
      OK (for 3UR-FE) A
      OK (for 1UR-FE) B
      OK (for 1GR-FE) C
      NG D

    A

    GO TO SFI SYSTEM Click here

    B

    GO TO SFI SYSTEM Click here

    C

    GO TO SFI SYSTEM Click here

    D

  3. CHECK WHETHER ENGINE STARTS


    1. Check that the engine starts 5 seconds after the engine switch turned on (IG).

      OK
      Engine starts normally.

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  4. CHECK HARNESS AND CONNECTOR (ID CODE BOX [IMMOBILISER CODE ECU] - ECM)


    1. Disconnect the E124 ID code box (immobiliser code ECU) connector.

    2. Disconnect the A38*1 or A52*2 ECM connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      for 3UR-FE:
      Tester Connection Condition Specified Condition
      E124-4 (EFIO) - A38-46 (IMI) Always Below 1 Ω
      E124-3 (EFII) - A38-48 (IMO) Always Below 1 Ω
      E124-4 (EFIO) or A38-46 (IMI) - Body ground Always 10 kΩ or higher
      E124-3 (EFII) or A38-48 (IMO) - Body ground Always 10 kΩ or higher
      for 1UR-FE, 1GR-FE (for LHD):
      Tester Connection Condition Specified Condition
      E124-4 (EFIO) - A38-40 (IMI) Always Below 1 Ω
      E124-3 (EFII) - A38-29 (IMO) Always Below 1 Ω
      E124-4 (EFIO) or A38-40 (IMI) - Body ground Always 10 kΩ or higher
      E124-3 (EFII) or A38-29 (IMO) - Body ground Always 10 kΩ or higher
      for 1UR-FE, 1GR-FE (for RHD):
      Tester Connection Condition Specified Condition
      E124-4 (EFIO) - A52-40 (IMI) Always Below 1 Ω
      E124-3 (EFII) - A52-29 (IMO) Always Below 1 Ω
      E124-4 (EFIO) or A52-40 (IMI) - Body ground Always 10 kΩ or higher
      E124-3 (EFII) or A52-29 (IMO) - Body ground Always 10 kΩ or higher
      for 1VD-FTV (for LHD):
      Tester Connection Condition Specified Condition
      E124-4 (EFIO) - A38-11 (IMI) Always Below 1 Ω
      E124-3 (EFII) - A38-10 (IMO) Always Below 1 Ω
      E124-4 (EFIO) or A38-11 (IMI) - Body ground Always 10 kΩ or higher
      E124-3 (EFII) or A38-10 (IMO) - Body ground Always 10 kΩ or higher
      for 1VD-FTV (for RHD):
      Tester Connection Condition Specified Condition
      E124-4 (EFIO) - A52-11 (IMI) Always Below 1 Ω
      E124-3 (EFII) - A52-10 (IMO) Always Below 1 Ω
      E124-4 (EFIO) or A52-11 (IMI) - Body ground Always 10 kΩ or higher
      E124-3 (EFII) or A52-10 (IMO) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. REGISTER ECU COMMUNICATION ID


    1. Register the ECU communication ID.

      Tech Tips

      Refer to Service Bulletin.


    NEXT

  6. CHECK WHETHER ENGINE STARTS


    1. Check that the engine starts.

      OK
      Engine starts normally.

    OK

    END (COMMUNICATION ID REGISTRATION WAS DEFECTIVE)

    NG

  7. REPLACE ID CODE BOX (IMMOBILISER CODE ECU)


    1. Replace the ID code box (immobiliser code ECU) with a new one.

      Tech Tips

      Refer to Service Bulletin.


    NEXT

  8. REGISTER RECOGNITION CODE


    1. Register the recognition codes in the ECUs.

      Tech Tips

      Refer to Service Bulletin.


    NEXT

  9. REGISTER ECU COMMUNICATION ID


    1. Register the ECU communication ID.

      Tech Tips

      Refer to Service Bulletin.


    NEXT

  10. CHECK WHETHER ENGINE STARTS


    1. Check that the engine starts.

      OK
      Engine starts normally.
      Result Proceed to
      OK A
      NG (for SFI System) B
      NG (for ECD System) C

      Tech Tips

      *: Go to procedure:

    A

    END (ID CODE BOX [IMMOBILISER CODE ECU] WAS DEFECTIVE)

    B

    GO TO SFI SYSTEM*

    C

    GO TO ECD SYSTEM*