Engine Immobiliser System (For 4Gr-Fse) How To Proceed With Troubleshooting

Securities. Lexus Is250, Is220D. Gse20 Ale20
Engine Immobiliser. Lexus Is250, Is220D. Gse20 Ale20

  1. VEHICLE BROUGHT TO WORKSHOP

  2. CRANK ENGINE FOR MORE THAN 10 SECONDS

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

  4. CHECK FOR DTC

  5. PROBLEM SYMPTOMS TABLE

  6. OVERALL ANALYSIS AND TROUBLESHOOTING

  7. ADJUST, REPAIR OR REPLACE

  8. CONFIRMATION TEST

Engine Immobiliser System (For 4Gr-Fse) -- How To Proceed With Troubleshooting


HINT:
  1. Use these procedures to troubleshoot the engine immobiliser system.
  1. The intelligent tester should be used in steps 3, 4 and 6.


1.VEHICLE BROUGHT TO WORKSHOP

    NEXT


    2.CRANK ENGINE FOR MORE THAN 10 SECONDS

      NEXT


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

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

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

        2. (ECU connected, 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 (Click here).

      2. Delete the DTC.

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

        Result:

        Result
        		Proceed to
        DTC output does not reoccur
        		A
        SFI system DTC output reoccurs
        		B
        Engine immobiliser system DTC output reoccurs
        		C


      		B.
      Go to SFI SYSTEM

      		C.
      Go to DTC CHART
      A


      5.PROBLEM SYMPTOMS TABLE

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

      2. If the fault is listed in the problem symptoms table, proceed to 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).


      NEXT


      7.ADJUST, REPAIR OR REPLACE

        NEXT


        8.CONFIRMATION TEST

          NEXT

          END