ENGINE IMMOBILISER SYSTEM > HOW TO PROCEED WITH TROUBLESHOOTING

for Preparation Click here


HINT:
Use this procedure to troubleshoot the engine immobiliser system.
The intelligent tester should be in used steps 3, 4, 5 and 7.



1.VEHICLE BROUGHT TO WORKSHOP

    NEXT


    2.CHECK HYBRID CONTROL SYSTEM

    1. Check hybrid control system.

      Result:

      Result
      		Proceed to
      When the ignition switch is turned to the ACC or ON position, the vehicle does not respond normally and the hybrid control system also does not start.
      		A
      When the ignition switch is turned to the ACC or ON position, the vehicle responds normally, but the hybrid control system does not start.
      		B



    		B.
    Go to HYBRID CONTROL SYSTEM
    A


    3.INSPECT COMMUNICATION FUNCTION OF MULTIPLEX COMMUNICATION SYSTEM (BEAN)

    1. Use the intelligent tester to check for normal function of the multiplex communication system.

      1. (ECU unconnected, communication line malfunctioning) Without code outputs, proceed to A.

      2. (ECU unconnected, communication line malfunctioning) With code outputs, proceed to B.



    		B.
    Go to MULTIPLEX COMMUNICATION SECTION
    A


    4.CHECK FOR DTC

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

    2. Delete the DTC.

    3. Recheck for DTCs. Try to prompt the DTC by simulating the original activity that the DTC suggested.

      1. If DTC does not reoccurs, proceed to A.

      2. If DTC reoccurs, proceed to B (Click here).



    		B.
    Go to DTC chart
    A


    5.READ VALUE OF INTELLIGENT TESTER

    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch on and turn the intelligent tester main switch on.

    3. Select item Key SW in the DATA LIST and read the value displayed on the intelligent tester.

      Transponder key ECU: 
      Item
      		Measurement Item/Display (Range)
      		Normal Condition
      		Diagnostic Note
      Key SW
      		Unlock warning switch signal /ON or OFF
      		ON: Key is in ignition key cylinder
      OFF: No key is in ignition key cylinder
      		-

      OK:
      Both ON (Key is in ignition key cylinder) and OFF (No key is in ignition key cylinder) appear on the screen.



    		NG.
    Go to DTC B2780
    OK


    6.PROBLEM SYMPTOMS TABLE

    1. If the fault is not listed on the problem symptoms table, proceed to A.

    2. If the fault is listed on the problem symptoms table, proceed to B.



    		B.
    After repair, go to step 8
    A


    7.OVERALL ANALYSIS AND TROUBLESHOOTING

    1. Inspection with the intelligent tester (ECU DATA MONITOR).

    2. Inspection with the intelligent tester (ACTIVE TEST).

    3. Terminals of ECU (Click here).


    NEXT


    8.ADJUST, REPAIR OR REPLACE

      NEXT


      9.CONFIRMATION TEST

        NEXT

        END