ENGINE IMMOBILISER SYSTEM > HOW TO PROCEED WITH TROUBLESHOOTING

for Preparation Click here


HINT:
  1. Use these procedures to troubleshoot the engine immobiliser system.
  1. *: Use the intelligent tester.



1.VEHICLE BROUGHT TO WORKSHOP

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    2.INSPECT AUXILIARY BATTERY VOLTAGE

      Standard Voltage:
      11 to 14 V

      1. 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)

      HINT:
      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



    		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)
    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).

        HINT:
        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