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

Tech Tips


  • Use this procedure to troubleshoot the immobiliser system.

  • *: Use the GTS.


  1. VEHICLE BROUGHT TO WORKSHOP


    NEXT

  2. CUSTOMER PROBLEM ANALYSIS

    Tech Tips


    • In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.

    • Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.

    • The following 5 items are important points for problem analysis:

    What Vehicle model, system name
    When Date, time, occurrence frequency
    Where Whether the problem occurs at a specific location.
    Under what conditions? Whether the doors were locked or unlocked, whether the ignition switch was ON, whether the engine was running.
    How did it happen? Problem symptoms

    NEXT

  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.


      NEXT

  4. CRANK ENGINE FOR MORE THAN 10 SECONDS


    NEXT

  5. CHECK FOR DTC* (ECM)


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

      Tech Tips

      Before checking for DTCs, perform the "DTC Output Confirmation Operation" of each diagnostic procedure.

      Result
      Result Proceed to
      DTCs are not output A
      SFI system DTCs are output (for 1TR-FE) B
      SFI system DTCs are output (for 2TR-FE [w/ Secondary Air Injection System]) C
      SFI system DTCs are output (for 2TR-FE [w/o Secondary Air Injection System]) D
      ECD system DTCs are output (for 1KD-FTV [w/o DPF]) E
      ECD system DTCs are output (for 1KD-FTV [w/ DPF]) F
      ECD system DTCs are output (for 2KD-FTV) G
      Immobiliser system DTCs are output H

      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

      E

      GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

      F

      GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

      G

      GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

      H

      GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

      A

  6. CHECK FOR DTC* (TRANSPONDER KEY ECU ASSEMBLY)


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

      Tech Tips

      Before checking for DTCs, perform the "DTC Output Confirmation Operation" of each diagnostic procedure.

      Result
      Result Proceed to
      DTCs are not output A
      Immobiliser system DTCs are output B

      B

      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

      ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH PROBLEM SYMPTOMS TABLE
      A

  8. OVERALL ANALYSIS AND TROUBLESHOOTING*


    1. Data List / Active Test Click here.

    2. Terminals of ECU Click here.


      NEXT

  9. REPAIR OR REPLACE

    Tech Tips

    If the transponder key ECU assembly, ECM, or key are replaced, refer to Service Bulletin.


    NEXT

  10. CHECK FOR DTC*


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      Tech Tips

      Before checking for DTCs, perform the "DTC Output Confirmation Operation" of each diagnostic procedure.

      Result
      Result Proceed to
      DTCs are not output A
      Immobiliser system DTCs are output B

      B

      GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

      A
      END