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

DESCRIPTION

The 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.

The system unsets if these ID codes match. Thus, the certification ECU (smart key ECU assembly) and the ECM communicate with each other enabling the engine to start.

WIRING DIAGRAM

Refer to B2799.

Click here

CAUTION / NOTICE / HINT

Note


  • When using the GTS with the vehicle 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 the 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 immobiliser system uses the LIN 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

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

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

    Click here

Tech Tips

When the ECM and certification ECU (smart key ECU assembly) DTC are output simultaneously, first perform troubleshooting for the ECM and certification ECU (smart key ECU assembly) DTC.

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

    GO TO STEP 4 Click here

    C

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    A

  2. READ VALUE USING GTS (IMMOBILISER FUEL CUT)


    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 and ECT / Data List.

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

      Engine and ECT
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Immobiliser Fuel Cut Status of immobiliser system fuel cut ON or OFF - -
      OK
      OFF is displayed after the engine is started.
      Result
      Proceed to
      OK (for 2TR-FE)
      OK (for 1GR-FE)
      NG

    OK (for 2TR-FE)

    GO TO SFI SYSTEM Click here

    OK (for 1GR-FE)

    GO TO SFI SYSTEM Click here

    NG

  3. CHECK WHETHER ENGINE STARTS


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

      OK
      Engine starts normally.
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  4. INSPECT ECM (TERMINAL IMI AND IMO)


    1. Using an oscilloscope, check the waveform.

      Figure 1. for Gasoline:

      B001EE6C03
      *A for 2TR-FE *B for 1GR-FE
      *C for Automatic Transmission *D for Manual Transmission
      *1 Waveform (IMO) *2 Waveform (IMI)
      *3 Waveform A *4 Waveform B
      *5 Waveform C - -
      *a

      Component with harness connected

      (ECM)

      		 *b Approximately 160 ms
      *c Approximately 270 ms *d Approximately 40 ms
      *e Approximately 60 ms - -

      Figure 2. for Diesel:

      B001HE6C01
      *A for 1KD-FTV *B for 1GD-FTV
      *1 Waveform (IMO) *2 Waveform (IMI)
      *3 Waveform A *4 Waveform B
      *5 Waveform C - -
      *a

      Component with harness connected

      (ECM)

      		 *b Approximately 160 ms
      *c Approximately 270 ms *d Approximately 40 ms
      *e Approximately 60 ms - -

      Tech Tips

      The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

      Measurement Condition
      for Gasoline
      Item Content
      Tester Connection

      G181-9 (IMO) - Body ground*1

      G181-10 (IMI) - Body ground*1

      G56-8 (IMO) - Body ground*2

      G56-10 (IMI) - Body ground*2

      G56-20 (IMO) - Body ground*3

      G56-14 (IMI) - Body ground*3
      Tool Setting 2 V/DIV., 500 ms./DIV.
      Condition Within 3 seconds after engine starts, or within 3 seconds after engine switch turned on (IG) after battery disconnected and reconnected
      for Diesel
      Item Content
      Tester Connection

      G58-29 (IMO) - Body ground*4

      G58-28 (IMI) - Body ground*4

      G185-17 (IMO) - Body ground*5

      G185-16 (IMI) - Body ground*5
      Tool Setting 2 V/DIV., 500 ms./DIV.
      Condition Within 3 seconds after engine starts, or within 3 seconds after engine switch turned on (IG) after battery disconnected and reconnected

      • *1: for 2TR-FE

      • *2: for 1GR-FE (for Automatic Transmission)

      • *3: for 1GR-FE (for Manual Transmission)

      • *4: for 1KD-FTV

      • *5: for 1GD-FTV

      Result
      Result Proceed to
      Normal waveform A
      Waveform A not output, or has abnormal wavelength or shape B
      Waveform B not output, or has abnormal wavelength or shape C
      Waveform C not output, or has abnormal wavelength or shape D

    B

    CHECK HARNESS AND CONNECTOR (ID CODE BOX (IMMOBILISER CODE ECU) - ECM) Click here

    C

    REPLACE ECM for 1GR-FE: Click here for 2TR-FE: Click here for 1KD-FTV: Click here for 1GD-FTV: Click here

    D

    GO TO STEP 8 Click here

    A

  5. REGISTER ECU COMMUNICATION ID


    1. Reregister the ECU communication ID.

      Tech Tips

      Refer to Service Bulletin.

      Result
      Proceed to
      NEXT

    NEXT

  6. CHECK WHETHER ENGINE STARTS


    1. Using a registered vehicle key, turn the engine switch on (IG).

      OK
      Engine starts normally.
      Result
      Proceed to
      OK
      NG

    OK

    END (COMMUNICATION ID REGISTRATION WAS DEFECTIVE)

    NG

    REPLACE ID CODE BOX (IMMOBILISER CODE ECU) Click here

  7. CHECK HARNESS AND CONNECTOR (ID CODE BOX (IMMOBILISER CODE ECU) - ECM)


    1. Disconnect the G207 ID code box (immobiliser code ECU) connector.

    2. Disconnect the G56*1, G181*2, G58*3 or G185*4 ECM connector.


      • *1: for 1GR-FE

      • *2: for 2TR-FE

      • *3: for 1KD-FTV

      • *4: for 1GD-FTV

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

      Standard Resistance
      for 1GR-FE (for Automatic Transmission)
      Tester Connection Condition Specified Condition
      G207-4 (EFIO) - G56-10 (IMI) Always Below 1 Ω
      G56-10 (IMI) - Body ground Always 10 kΩ or higher
      G207-4 (EFIO) - Body ground Always 10 kΩ or higher
      for 1GR-FE (for Manual Transmission)
      Tester Connection Condition Specified Condition
      G207-4 (EFIO) - G56-14 (IMI) Always Below 1 Ω
      G56-14 (IMI) - Body ground Always 10 kΩ or higher
      G207-4 (EFIO) - Body ground Always 10 kΩ or higher
      for 2TR-FE
      Tester Connection Condition Specified Condition
      G207-4 (EFIO) - G181-10 (IMI) Always Below 1 Ω
      G181-10 (IMI) - Body ground Always 10 kΩ or higher
      G207-4 (EFIO) - Body ground Always 10 kΩ or higher
      for 1KD-FTV
      Tester Connection Condition Specified Condition
      G207-4 (EFIO) - G58-28 (IMI) Always Below 1 Ω
      G58-28 (IMI) - Body ground Always 10 kΩ or higher
      G207-4 (EFIO) - Body ground Always 10 kΩ or higher
      for 1GD-FTV
      Tester Connection Condition Specified Condition
      G207-4 (EFIO) - G185-16 (IMI) Always Below 1 Ω
      G185-16 (IMI) - Body ground Always 10 kΩ or higher
      G207-4 (EFIO) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. 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.

      Result
      Proceed to
      NEXT

    NEXT

  9. REGISTER RECOGNITION CODES


    1. Register the recognition codes in the ECUs.

      Tech Tips

      Refer to Service Bulletin.

      Result
      Proceed to
      NEXT

    NEXT

  10. REGISTER ECU COMMUNICATION ID


    1. Reregister the ECU communication ID.

      Tech Tips

      Refer to Service Bulletin.

      Result
      Proceed to
      NEXT

    NEXT

  11. CHECK WHETHER ENGINE STARTS


    1. Using a registered vehicle key, turn the engine switch on (IG).

      OK
      Engine starts normally.
      Result
      Result Proceed to
      OK A
      NG (for 2TR-FE) B
      NG (for 1GR-FE) C
      NG (for 1KD-FTV) D
      NG (for 1GD-FTV) E
      NG (for 1GD-FTV (w/ Urea SCR system)) F

    A

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

    B

    GO TO SFI SYSTEM Click here

    C

    GO TO SFI SYSTEM Click here

    D

    GO TO ECD SYSTEM Click here

    E

    GO TO ECD SYSTEM Click here

    F

    GO TO ECD SYSTEM Click here