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 Techstream.


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 DTCS*
      1. Check for DTCs and note any codes that are output (Click here).

      2. Delete the DTC.

      3. Recheck for DTCs. Based on the DTC output in (a), try to force output of the same SFI system DTC or engine immobiliser system DTC by simulating the original activity indicated by the DTC.

      4. 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 STEP 8
      A


      5.READ VALUE USING TECHSTREAM*
      1. Connect the Techstream to the DLC3.

      2. Turn the ignition switch ON and push the Techstream main switch ON.

      3. On the Techstream, enter the following menus: Body Electrical / Immobiliser / Data List / Key SW. Read the values.

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

        OK:
        ON (key is in ignition key cylinder) appears on the screen.


      NG.
      GO TO DTC B2780
      OK


      6.PROBLEM SYMPTOMS TABLE
        Result
        Proceed to
        Fault is not listed in problem symptoms table
        A
        Fault is listed in problem symptoms table
        B


      B.
      GO TO STEP 8
      A


      7.OVERALL ANALYSIS AND TROUBLESHOOTING*
      1. Data List/Active Test (Click here)

        1. Inspection with Techstream (Data List)

        2. Inspection with Techstream (Active Test)

      2. Terminals of ECU (Click here)


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      8.ADJUST, REPAIR OR REPLACE

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        9.CONFIRMATION TEST

          NEXT

          END