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 make a note of any codes that are output Click here.

    2. Clear the DTC Click here.

    3. Recheck for DTCs Click here. Based on the DTCs output above, try to cause the output of the same SFI system DTC, LIN communication system DTC, steering lock system DTC, blocking system* DTC or engine immobiliser system DTC by simulating the symptoms indicated by the DTC.


      • *: w/ Blocking System

      Result:
      Result Proceed to
      DTC is not output A
      SFI system (for 1UR-FSE) DTC is output B
      SFI system (for 1UR-FE) DTC is output C
      LIN communication system DTC is output D
      Steering lock system DTC is output E
      Engine immobiliser system DTC is output F
      Blocking system DTC is output (w/ Blocking System) G

      B

      Go to SFI SYSTEM (for 1UR-FSE) Click here

      C

      Go to SFI SYSTEM (for 1UR-FE) Click here

      D

      Go to LIN COMMUNICATION SYSTEM Click here

      E

      Go to STEERING LOCK SYSTEM Click here

      F

      Go to DIAGNOSTIC TROUBLE CODE CHART Click here

      G

      Go to BLOCKING SYSTEM Click here

      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


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  7. ADJUST, REPAIR OR REPLACE


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  8. CONFIRMATION TEST


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    END