IMMOBILISER 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.

WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note


  • When using the GTS with the power 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 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.

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  • Before replacing the 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."

Tech Tips

If a immobiliser system or hybrid control system DTC is output, first perform troubleshooting for the immobiliser system or hybrid control system DTC.

PROCEDURE


  1. CHECK FOR DTC


    1. Check for DTCs.


      Body Electrical > Entry&Start > Trouble Codes
      Powertrain > Hybrid Control > Trouble Codes
      Result
      Result Proceed to
      DTCs are not output A
      DTCs are output B

    B

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    A

  2. CHECK WHETHER HYBRID CONTROL SYSTEM STARTS


    1. Check that the hybrid control system starts 5 seconds after the power switch turned on (READY).

      OK
      Hybrid control system starts normally.
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  3. INSPECT POWER MANAGEMENT CONTROL ECU (TERMINAL IMI AND IMO)


    1. Using an oscilloscope, check the waveform.

      A00219GC03
      *a

      Component with harness connected

      (Power Management Control ECU)

      		 *b Approximately 160 ms
      *c Approximately 270 ms *d Approximately 40 ms
      *e Approximately 60 ms *f Waveform (IMO)
      *g Waveform (IMI) *h Waveform A
      *i Waveform B *j Waveform C
      *k Waveform A (detail) - -

      Note

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

      Measurement Condition
      Tester Connection Condition Tool Setting Specified Condition
      K33-28 (IMO) - K32-6 (E1) Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after auxiliary battery cable disconnected and reconnected 2 V/DIV., 500 ms./DIV.

      Pulse generation

      (See waveform (IMO))
      K33-29 (IMI) - K32-6 (E1) Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after auxiliary battery cable disconnected and reconnected 2 V/DIV., 500 ms./DIV.

      Pulse generation

      (See waveform (IMI))
      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) - POWER MANAGEMENT CONTROL ECU) Click here

    C

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    D

    REPLACE ID CODE BOX (IMMOBILISER CODE ECU) Click here

    A

  4. REGISTER ECU COMMUNICATION ID


    1. Register the ECU communication ID.

      Tech Tips

      Refer to Service Bulletin.

      Result
      Proceed to
      NEXT

    NEXT

  5. CHECK WHETHER HYBRID CONTROL SYSTEM STARTS


    1. Check that the hybrid control system starts.

      OK
      Hybrid control system starts normally.
      Result
      Proceed to
      OK
      NG

    OK

    END (COMMUNICATION ID REGISTRATION WAS DEFECTIVE)

    NG

    GO TO STEP 7 Click here

  6. CHECK HARNESS AND CONNECTOR (ID CODE BOX (IMMOBILISER CODE ECU) - POWER MANAGEMENT CONTROL ECU)


    1. Disconnect the K83 ID code box (immobiliser code ECU) connector.

    2. Disconnect the K33 power management control ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K83-3 (EFII) - K33-28 (IMO) Always Below 1 Ω
      K83-4 (EFIO) - K33-29 (IMI) Always Below 1 Ω
      K83-3 (EFII) or K33-28 (IMO) - Body ground Always 10 kΩ or higher
      K83-4 (EFIO) or K33-29 (IMI) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  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.

      Result
      Proceed to
      NEXT

    NEXT

  8. REGISTER RECOGNITION CODE


    1. Register the recognition codes in the ECUs.

      Tech Tips

      Refer to Service Bulletin.

      Result
      Proceed to
      NEXT

    NEXT

  9. REGISTER ECU COMMUNICATION ID


    1. Register the ECU communication ID.

      Tech Tips

      Refer to Service Bulletin.

      Result
      Proceed to
      NEXT

    NEXT

  10. CHECK WHETHER HYBRID CONTROL SYSTEM STARTS


    1. Check that the hybrid control system starts.

      OK
      Hybrid control system starts normally.
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    GO TO HYBRID CONTROL SYSTEM Click here