IMMOBILISER SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

DTC Code DTC Name
HOW TO PROCEED WITH TROUBLESHOOTING

CAUTION / NOTICE / HINT

Tech Tips


  • Use this procedure to troubleshoot the immobiliser system.

  • *: Use the GTS.

PROCEDURE


  1. VEHICLE BROUGHT TO WORKSHOP

    Result
    Proceed to
    NEXT

    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 power switch was on, whether the hybrid control system was running.
    How did it happen? Problem symptoms
    Result
    Proceed to
    NEXT

    NEXT
  3. INSPECT AUXILIARY BATTERY VOLTAGE


    1. Measure the auxiliary battery voltage with the power switch off.

      Standard Voltage
      11 to 14 V

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

      Tech Tips

      A simple method to determine whether the auxiliary battery is discharged is to operate the horn.

      Result
      Proceed to
      NEXT

    NEXT
  4. TURN POWER SWITCH ON (IG)

    Tech Tips

    When using the GTS with the power switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

    Result
    Proceed to
    NEXT

    NEXT
  5. INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*


    1. Using the GTS, check for CAN communication system DTCs.

      Click here

      Result
      Result Proceed to
      CAN DTCs are not output A
      CAN DTCs are output B

    B
    A
  6. INSPECT COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*


    1. Use the GTS, check for LIN communication system DTCs.

      Click here

      Result
      Result Proceed to
      LIN DTCs are not output A
      LIN DTCs are output B

    B
    A
  7. CHECK FOR DTC*


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


      Body Electrical > Entry&Start > Trouble Codes
      Powertrain > Hybrid Control > Trouble Codes
    2. Based on the DTCs output above, proceed to each diagnostic procedure.

      Result
      Result Proceed to
      DTCs are not output A
      Hybrid control system DTCs are output B
      Electronic shift lever system DTCs are output C
      Immobiliser system DTCs are output D

    B
    C
    D
    A
  8. 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
    A
  9. OVERALL ANALYSIS AND TROUBLESHOOTING*


    1. Data List / Active Test.

      Click here

    2. Terminals of ECU.

      Click here

      Result
      Proceed to
      NEXT

    NEXT
  10. REPAIR OR REPLACE

    Tech Tips

    If the certification ECU (smart key ECU assembly), ID code box ECU (immobiliser code ECU), hybrid vehicle control ECU assembly or key is replaced, refer to Service Bulletin.

    Result
    Proceed to
    NEXT

    NEXT
  11. CHECK FOR DTC*


    1. Clear the DTCs.


      Body Electrical > Entry&Start > Clear DTCs
      Powertrain > Hybrid Control > Clear DTCs
    2. Check for DTCs.


      Body Electrical > Entry&Start > Trouble Codes
      Powertrain > Hybrid Control > Trouble Codes

      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

    A
    B