ENGINE IMMOBILISER SYSTEM (w/o Entry and Start System) HOW TO PROCEED WITH TROUBLESHOOTING

Tech Tips

Use the following procedure to troubleshoot the engine immobiliser system.

*: Use the intelligent tester .


  1. VEHICLE BROUGHT TO WORKSHOP


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  2. CUSTOMER PROBLEM ANALYSIS CHECK


    1. Interview the customer to confirm the trouble Click here.


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  3. INSPECT BATTERY VOLTAGE


    1. Measure the battery voltage.

      Standard voltage
      11 to 14 V

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


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  4. CRANK ENGINE FOR MORE THAN 10 SECONDS


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  5. CHECK FOR DTC*


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

    2. Clear the DTCs Click here.

    3. Recheck for DTCs. Try to duplicate the DTCs (ECD system or SFI system and engine immobiliser system) by simulating the symptoms indicated by the DTCs.

      Result
      Result Proceed to
      DTC is not output A
      DTC is (ECD system) output (for 1ND-TV) B
      DTC is (SFI system) output (for 1KR-FE) C
      DTC is (SFI system) output (for 1NR-FE) D
      DTC is output (engine immobiliser system) E

      B

      GO TO DTC CHART Click here

      C

      GO TO DTC CHART Click here.
      D

      GO TO DTC CHART Click here.
      E

      GO TO DTC CHART Click here.
      A

  6. READ VALUE USING INTELLIGENT TESTER*


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the tester on.

    4. Enter the following menus: Body / Immobiliser / Data List.

    5. According to the display on the tester, read the Data List.

      Immobiliser
      Tester Display Measurement Item/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
      ON (Key is in ignition key cylinder) appears on the screen.

      NG

      GO TO DTC B2780 Click here.
      OK

  7. PROBLEM SYMPTOMS TABLE

    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. Data List/Active Test Click here

    2. Terminals OF ECU Click here


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  9. ADJUST, REPAIR OR REPLACE

    Note


    • If the transponder key ECU is replaced, register key and ECU - ECM communication ID.

    • When the ECM is replaced, reregister the ECU - ECM communication ID.


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  10. CONFIRMATION TEST


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    END