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


    NEXT

  2. INSPECT AUXILIARY BATTERY VOLTAGE

    Standard Voltage
    11 to 14 V

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


    NEXT

  3. TURN POWER SWITCH ON (IG)

    Tech Tips

    If the power switch cannot be turned on (IG), communication with the intelligent tester can be confirmed by connecting the intelligent tester to the vehicle and turning a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the intelligent tester and vehicle begins.


    NEXT

  4. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*


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

      Result
      Result Proceed to
      CAN DTC is not output A
      CAN DTC is output B

      B

      GO TO CAN COMMUNICATION SYSTEM Click here

      A

  5. CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*


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

      Result
      Result Proceed to
      LIN DTC is not output A
      LIN DTC is output B

      B

      GO TO LIN COMMUNICATION SYSTEM Click here

      A

  6. CHECK FOR DTC*


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

    2. Based on the DTCs output above, proceed to each diagnostic procedure.

      Result
      Result Proceed to
      DTC is not output A
      Hybrid control system DTC is output B
      Electronic shift lever system DTC is output C
      Engine immobiliser system DTC is output D
      Blocking System DTC is output (w/ Blocking System) E

      B

      Go to DIAGNOSTIC TROUBLE CODE CHART Click here

      C

      Go to DIAGNOSTIC TROUBLE CODE CHART Click here

      D

      Go to DIAGNOSTIC TROUBLE CODE CHART Click here

      E

      Go to DIAGNOSTIC TROUBLE CODE CHART Click here

      A

  7. 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 9
      A

  8. OVERALL ANALYSIS AND TROUBLESHOOTING*


    1. Check Data List / Active Test Click here.

    2. Check Terminals of ECU Click here.


      NEXT

  9. ADJUST, REPAIR OR REPLACE


    NEXT

  10. CHECK FOR DTC*


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      Tech Tips

      Before checking for DTCs, perform the "DTC Output Confirmation Operation" of each diagnostic procedure Click here.

      Result
      Result Proceed to
      DTC is not output A
      Engine immobiliser system DTC is output B

      B

      Go to DIAGNOSTIC TROUBLE CODE CHART Click here

      A
      END