ENGINE IMMOBILISER SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

Tech Tips


  • Use these procedures to troubleshoot the engine immobiliser system.

  • *: Use the intelligent tester.


  1. VEHICLE BROUGHT TO WORKSHOP


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  2. INSPECT BATTERY VOLTAGE

    Standard voltage
    11 to 14 V

    • If the voltage is below 11 V, recharge or replace the battery before proceeding.


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  3. CRANK ENGINE FOR MORE THAN 10 SECONDS


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  4. CHECK FOR DTC*


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

    2. Delete the DTC.

    3. Recheck for DTCs. Based on the DTC output above, try to force output of the same SFI, ECD or engine immobiliser system DTC by simulating the symptoms indicated by the DTC.

      Result:
      Result Proceed to
      DTC does not reoccur A
      SFI system DTC reoccurs B
      ECD system DTC reoccurs C
      Engine immobiliser system DTC reoccurs D

      B

      Go to SFI system
      C

      Go to ECD system
      D

      Go to step 7
      A

  5. PROBLEM SYMPTOMS TABLE

    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 7
    A

  6. OVERALL ANALYSIS AND TROUBLESHOOTING*


    1. Data List/Active Test Click here

    2. Terminals of ECU Click here

    3. Inspection Click here


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  7. ADJUST, REPAIR OR REPLACE


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  8. CONFIRMATION TEST


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    END