ENGINE IMMOBILISER SYSTEM (w/ Entry and Start System) HOW TO PROCEED WITH TROUBLESHOOTING

Tech Tips


  • Use the following procedure to troubleshoot the engine immobiliser system.


  • *: Using the intelligent tester.


  1. VEHICLE BROUGHT TO WORKSHOP


    NEXT

  2. CUSTOMER PROBLEM ANALYSIS


    1. Interview the customer to confirm the trouble Click here.


      NEXT

  3. INSPECT BATTERY VOLTAGE


    1. Measure the battery voltage.

      Standard voltage
      11 to 14 V

      If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.


      NEXT

  4. ENGINE SWITCH ON (IG)


    NEXT

  5. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*


    1. Use the intelligent tester to check if the CAN communication system is functioning normally.

      Result
      Result Proceed to
      ECU is connected, communication line is normal A
      ECU is connected, communication line is malfunctioning B

      B

      GO TO CAN COMMUNICATION SYSTEM Click here

      A

  6. CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*


    1. Use the intelligent tester to check if the LIN communication system is functioning normally.

      Result
      Result Proceed to
      No DTC is output A
      DTC is output B

      B

      GO TO LIN COMMUNICATION SYSTEM Click here

      A

  7. CHECK FOR DTCS (ENTRY AND START SYSTEM)*


    1. Check for DTCs and note any codes that are output.

    2. Clear the DTCs Click here.

    3. Recheck for DTCs. Based on the DTCs output above, try to duplicate the engine immobiliser system DTC or steering lock system DTC by simulating the symptoms indicated by the DTCs.

      Result
      Result Proceed to
      No DTCs are output A
      Steering lock system DTC is output (DTC B2781, B2782 or B2788) B
      Engine immobiliser system DTC is output (except DTC B2781, B2782 and B2788) C

      B

      GO TO STEERING LOCK SYSTEM Click here

      C

      GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

      A

  8. CHECK FOR DTCS (ECD SYSTEM OR SFI SYSTEM)*


    1. for 1ND-TV


      1. Clear the DTCs Click here.

      2. Recheck for DTCs.

    2. for 1KR-FE


      1. Clear the DTCs Click here.

      2. Recheck for DTCs.

    3. for 1NR-FE


      1. Clear the DTCs Click here.

      2. Recheck for DTCs.

        Tech Tips

        The DTCs for the engine immobiliser system are specified above. If other codes are output, check the DTC chart for the ECD system or SFI system.

        Result
        Result Proceed to
        No DTCs are output A
        Engine immobiliser system DTC is output (DTC B2799, B279A or B279C) B
        SFI system DTC is output (except DTC B2799, B279A and B279C) for 1KR-FE C
        SFI system DTC is output (except DTC B2799, B279A and B279C) for 1NR-FE D
        ECD system DTC is output (except DTC B2799, B279A and B279C) E

      B

      GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

      C

      GO TO SFI SYSTEM Click here

      D

      GO TO SFI SYSTEM Click here

      E

      GO TO ECD SYSTEM Click here

      A

  9. PROBLEM SYMPTOMS TABLE


    1. Refer to Problem Symptoms Table Click here.

      Result
      Result Proceed to
      Fault is not listed in Problem Symptoms Table A
      Fault is listed in Problem Symptoms Table B

      B

      Go to step 11
      A

  10. OVERALL ANALYSIS AND TROUBLESHOOTING*


    1. Data List/Active Test Click here

    2. Terminals of ECU Click here


      NEXT

  11. ADJUST, REPAIR OR REPLACE

    Note


    • If the certification ECU is replaced, register the key.

    • If the ID code box is replaced, register the ECU code and ECU communication ID.

    • If the ECM is replaced, register the ECU communication ID.


    NEXT

  12. CONFIRMATION TEST


    NEXT
    END