ENTRY AND START SYSTEM(for Start Function) Additional Key cannot be Registered

DESCRIPTION

If additional registration is not possible, a malfunction of the electrical key transmitter sub-assembly, certification ECU (smart key ECU assembly), engine switch, No. 1 indoor electrical key antenna assembly (front floor), steering lock ECU (steering lock actuator or upper bracket assembly) or door control receiver is suspected.

CAUTION / NOTICE / HINT

Note


  • If registration of an electrical key transmitter sub-assembly cannot be performed, refer to the Service Bulletin.

  • When using the GTS with the engine 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. 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.

  • The entry and start system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the entry and start system (for Start Function) after confirming that the communication systems are functioning properly.

    Click here

  • Before replacing the certification ECU (smart key ECU assembly), steering lock ECU (steering lock actuator or upper bracket assembly) or electrical key transmitter sub-assembly, refer to the Service Bulletin.

  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

Tech Tips

When additional registration is not possible, operation history may be stored in the certification ECU (smart key ECU assembly).

Click here

PROCEDURE


  1. CHECK FOR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Entry&Start / Trouble Codes.

    5. Check for DTCs.


      Body Electrical > Entry&Start > Trouble Codes

      Note

      If a malfunction occurs, do not remove/install the vehicle battery before checking for DTCs.

      OK
      DTCs are not output.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    OK

  2. READ VALUE USING GTS (UNMATCHED VEHICLE-ID)


    1. Enter the following menus: Body Electrical / Entry&Start / Data List.

    2. Read the Data List according to the display on the GTS.


      Body Electrical > Entry&Start > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Unmatched Vehicle-ID Key No. (incorrect or correct) Yes or No

      Yes: Communication malfunction

      No: Communication normal

      The vehicle ID registered in the vehicle and the vehicle ID registered in the electrical key transmitter sub-assembly are different (if a key from another vehicle is brought into the vehicle exterior detection area while the doors are locked, "Yes" is displayed for "Unmatched Vehicle-ID" in the Data List).

      Other potential causes:


      • An electrical key transmitter sub-assembly from a different vehicle is being used.

      • A communication error due to wave interference.

      • The electrical key transmitter sub-assembly or certification ECU (smart key ECU assembly) is malfunctioning.

      Body Electrical > Entry&Start > Data List
      Tester Display
      Unmatched Vehicle-ID
      Result
      Result Proceed to
      "No" is displayed A
      "Yes" is displayed B

    B

    GO TO STEP 5 Click here

    A

  3. CHECK PUSH-BUTTON START FUNCTION


    1. B006G93C05
      *1 Engine Switch
      *2 Electrical Key Transmitter Sub-assembly

      Remove the transmitter battery from the electrical key transmitter sub-assembly.

      Click here

    2. With the brake pedal depressed, hold the electrical key transmitter sub-assembly near the engine switch and check if the power source mode changes.

      OK
      The power source mode changes.

      Tech Tips

      If the power source mode changes, the cabin verification is malfunctioning.

      Result
      Result Proceed to
      The power source mode changes A
      The power source mode does not change B

    B

    GO TO OTHER PROBLEM (Power Source Mode does not Change to ON (IG and ACC)) Click here

    A

  4. CHECK STEERING LOCK FUNCTION


    1. Check that the steering unlocks when all of the following conditions are met.


      • The electrical key transmitter sub-assembly is inside the vehicle.

      • Engine switch is on (ACC) or on (IG).

      Tech Tips

      Check that the communication between the steering lock ECU (steering lock actuator or upper bracket assembly) and certification ECU (smart key ECU assembly) is normal.

      OK
      The steering unlocks.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO OTHER PROBLEM (Unable to Unlock Steering Wheel (Engine cannot Start)) Click here

    OK

  5. REGISTRATION


    1. Using another unregistered electrical key transmitter sub-assembly, perform the additional registration procedure.

      Tech Tips

      Refer to Service Bulletin.

      OK
      Additional registration can be completed.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY (FIRST REGISTERED KEY WAS DEFECTIVE)

    NG

  6. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. Temporarily replace the certification ECU (smart key ECU assembly) with a new one and register the electrical key transmitter sub-assemblies.

      Tech Tips

      Refer to Service Bulletin.

      OK
      All of the electrical key transmitter sub-assemblies could be registered to the new certification ECU (smart key ECY assembly) successfully.
      Result
      Proceed to
      OK
      NG

    OK

    END (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) WAS DEFECTIVE)

    NG

    GO TO OTHER PROBLEM (New key cannot be Registered) Click here