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

DESCRIPTION

If a new electrical key transmitter sub-assembly could not be registered, wave interference or a malfunction of the certification ECU (smart key ECU assembly), electrical key transmitter sub-assembly, steering lock ECU (steering lock actuator or upper bracket assembly), ID code box (immobiliser code ECU)* or door control receiver assembly is suspected.

The registration procedure to add another electrical key transmitter sub-assembly (without replacing any parts) is called "additional key ID registration".

If additional registration is not possible, refer to Additional Key cannot be Registered.

Click here


Tech Tips


    If any of the following have been performed, registration of all electrical key transmitter sub-assemblies is necessary:

  • The certification ECU (smart key ECU assembly) has been replaced.

  • The certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU) have been replaced.*

  • The certification ECU (smart key ECU assembly), ID code box (immobiliser code ECU)* and steering lock ECU (steering lock actuator or upper bracket assembly) have been replaced.


    • *: w/ ID Code Box

WIRING DIAGRAM

B006X8WE09

CAUTION / NOTICE / HINT

Note


  • New registration mode can be entered only when no electrical key transmitter sub-assemblies are stored in the certification ECU (smart key ECU assembly).

  • 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(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.

  • The smart 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 smart entry and start system (for Start Function) after confirming that the communication systems are functioning properly.

    Click here

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


    • *: w/ ID Code Box

  • Inspect the fuses for circuits related to this system before performing the following procedure.

  • After repair, confirm that no DTCs are output.

PROCEDURE


  1. CHECK FOR DTC


    1. 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 (NUMBER OF REGISTERED KEY CODES)


    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 / Data List.

    5. 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
      Number of Registered Key Codes Number of registered electrical key transmitter sub-assemblies 0 to 8 Number of registered electrical key transmitter sub-assemblies Up to 7 electrical key transmitter sub-assemblies can be registered.

      Body Electrical > Entry&Start > Data List
      Tester Display
      Number of Registered Key Codes

      Tech Tips

      A new certification ECU (smart key ECU assembly) will be have no electrical key transmitter sub-assemblies registered.

      OK
      "0" is displayed on the GTS display.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

  3. READ VALUE USING GTS (OPERATION HISTORY)


    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 / Utility / Operation History / Certification ECU operation log of ID code registration.


      Body Electrical > Entry&Start > Utility
      Tester Display
      Operation History

    5. Check the freeze frame data.

      Registration Function (Reason for Non-operation)
      Parameter Name Detection Condition Trouble Area Proceed to
      Failed Registration Mode

      • A registration request was sent while in another mode.

      • During registration a different registration request was sent.

      		 Certification ECU (smart key ECU assembly) A
      Vehicle ID not set A vehicle ID has not been registered in the certification ECU (smart key ECU assembly). Certification ECU (smart key ECU assembly) B
      Key Registration Max A registration request is sent when the maximum number of electrical key transmitter sub-assemblies has already been registered.

        w/o ID Code Box

      • Certification ECU (smart key ECU assembly)

      		 B

        w/ ID Code Box

      • Certification ECU (smart key ECU assembly)

      • ID code box (immobiliser code ECU)

      		 C

        w/ ID Code Box

      • ID-BOX Error

      		 A registration request was sent even though the existence of an ID code box is unknown.

      • Certification ECU (smart key ECU assembly)

      • ID code box (immobiliser code ECU)

      		 D

      Vehicle Speed Too High

      (This applies only when registration fails even though the vehicle is stationary. Make sure that the vehicle is stationary first.)

      		 A registration request is sent with a vehicle speed of 5 km/h (3 mph) or more. Certification ECU (smart key ECU assembly) E
      No ECU Response The steering lock ECU (steering lock actuator or upper bracket assembly) was not connected.

        w/o ID Code Box

      • Certification ECU (smart key ECU assembly)

      • Steering lock ECU (steering lock actuator or upper bracket assembly)


        w/ ID Code Box

      • Certification ECU (smart key ECU assembly)

      • ID code box (immobiliser code ECU)

      • Steering lock ECU (steering lock actuator or upper bracket assembly)

      		 F
      L Code Verification Error

        w/o ID Code Box

      • The L codes registered in the certification ECU (smart key ECU assembly) and steering lock ECU (steering lock actuator or upper bracket assembly) did not match.


        w/ ID Code Box

      • The L codes registered in the ID code box (immobiliser code ECU) and steering lock ECU (steering lock actuator or upper bracket assembly) did not match.

        w/o ID Code Box

      • Certification ECU (smart key ECU assembly)

      • Steering lock ECU (steering lock actuator or upper bracket assembly)


        w/ ID Code Box

      • Certification ECU (smart key ECU assembly)

      • ID code box (immobiliser code ECU)

      • Steering lock ECU (steering lock actuator or upper bracket assembly)

      		 G

        w/ ID Code Box

      • L Code OK S Code NG

      		 L code verification was successful but the S code stored in the ID code box (immobiliser code ECU) and certification ECU (smart key ECU assembly) did not match.

      • Certification ECU (smart key ECU assembly)

      • ID code box (immobiliser code ECU)

      		 C
      Key Verification: Max Number

        w/o ID Code Box

      • The number of electrical key transmitter sub-assemblies registered in the certification ECU (smart key ECU assembly) was more than 7.

      		 Certification ECU (smart key ECU assembly) B

        w/ ID Code Box

      • The number of electrical key transmitter sub-assemblies registered in the ID code box (immobiliser code ECU) was more than 7.

      		 ID code box (immobiliser code ECU) H
      Key Verification: Amp Abnormal Malfunction of the immobiliser amplifier, such as a short to ground.

      • Certification ECU (smart key ECU assembly)

      • Engine switch

      		 I
      Key Verification: Read Error Although a registered electrical key transmitter sub-assembly was held near the engine switch, immobiliser function certification was not successful.

      • Certification ECU (smart key ECU assembly)

      • Electrical key transmitter sub-assembly

      		 J
      Unverified Key Although all of the registered electrical key transmitter sub-assemblies had been held near the engine switch, electrical key transmitter sub-assembly registration was not possible due to immobiliser function certification not being successful.

      • Certification ECU (smart key ECU assembly)

      • Electrical key transmitter sub-assembly

      		 K
      Transponder Key Amp Error Malfunction of the immobiliser amplifier, such as a short to ground.

      • Certification ECU (smart key ECU assembly)

      • Engine switch

      		 I
      New Key Registration Error Although an unregistered electrical key transmitter sub-assembly was held near the engine switch, electrical key transmitter sub-assembly registration is not possible due to immobiliser function certification not being successful.

      • Certification ECU (smart key ECU assembly)

      • Electrical key transmitter sub-assembly

      		 L
      New Key Vehicle ID Error Although an unregistered electrical key transmitter sub-assembly was held near the engine switch, electrical key transmitter sub-assembly registration is not possible due to the vehicle ID not being stored successfully.

      • Certification ECU (smart key ECU assembly)

      • Electrical key transmitter sub-assembly

      		 L
      New Key Registration Failed After successful immobiliser function certification, time expired before smart recognition completion confirmation or a registration cancellation request was sent.

      • Certification ECU (smart key ECU assembly)

      • Electrical key transmitter sub-assembly

      		 L
      New Key Already Registered Although a registered electrical key transmitter sub-assembly was held near the engine switch, time expired or a registration cancellation request was sent. Certification ECU (smart key ECU assembly) M
      New Key ID Code Error Electrical key transmitter sub-assembly registration was not possible due to the certification ECU (smart key ECU assembly) not being able to store the information of the electrical key transmitter sub-assembly to EEPROM correctly. Certification ECU (smart key ECU assembly) B
      No Response Registering L/S Code

        w/o ID Code Box

      • The certification ECU (smart key ECU assembly) or steering lock ECU (steering lock actuator or upper bracket assembly) was not connected.


        w/ ID Code Box

      • The certification ECU (smart key ECU assembly), ID code box (immobiliser code ECU) or steering lock ECU (steering lock actuator or upper bracket assembly) was not connected.

        w/o ID Code Box

      • Certification ECU (smart key ECU assembly)

      • Steering lock ECU (steering lock actuator or upper bracket assembly)


        w/ ID Code Box

      • Certification ECU (smart key ECU assembly)

      • ID code box (immobiliser code ECU)

      • Steering lock ECU (steering lock actuator or upper bracket assembly)

      		 F

        w/ ID Code Box

      • S Code Verification NG

      		 The S code could not be stored by the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU).

      • Certification ECU (smart key ECU assembly)

      • ID code box (immobiliser code ECU)

      		 C
      L Code Verification NG

        w/o ID Code Box

      • The L code could not be stored by the steering lock ECU (steering lock actuator or upper bracket assembly).


        w/ ID Code Box

      • The L code could not be stored by the steering lock ECU (steering lock actuator or upper bracket assembly) or ID code box (immobiliser code ECU).

        w/o ID Code Box

      • Certification ECU (smart key ECU assembly)

      • Steering lock ECU (steering lock actuator or upper bracket assembly)


        w/ ID Code Box

      • Certification ECU (smart key ECU assembly)

      • ID code box (immobiliser code ECU)

      • Steering lock ECU (steering lock actuator or upper bracket assembly)

      		 G

        w/ ID Code Box

      • ECU ID Verification Error

      		 The code received from the ID code box (immobiliser code ECU) when the S code is registered does not match the code of the certification ECU (smart key ECU assembly).

      • Certification ECU (smart key ECU assembly)

      • ID code box (immobiliser code ECU)

      		 C
      Key Number Write Error The certification ECU (smart key ECU assembly) could not store the number of electrical key transmitter sub-assemblies to EEPROM. Certification ECU (smart key ECU assembly) B
      ID Code BOX Write Error The certification ECU (smart key ECU assembly) could not store the information of whether the ID code box was provided in the vehicle to EEPROM. Certification ECU (smart key ECU assembly) B

    B

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    C

    CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Click here

    D

    CHECK FOR DTC B2789 Click here

    E

    READ VALUE USING GTS (VEHICLE SPEED METER) Click here

    F

    CHECK FOR DTC B2785 Click here

    G

    CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Click here

    H

    REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

    I

    CHECK FOR DTC B278A or B2784 Click here

    J

    CHECK ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY Click here

    K

    CHECK FOR ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY Click here

    L

    REREGISTRATION Click here

    M

    Check if a registered electrical key transmitter sub-assembly was held near the engine switch instead of an unregistered electrical key transmitter sub-assembly by mistake. Perform registration again using an unregistered electrical key transmitter sub-assembly. If the same problem occurs again, replace the certification ECU (smart key ECU assembly).

    A

  4. CHECK REGISTRATION MODE


    1. Make sure that another mode or different registration mode is not selected.

      OK
      Another mode or a different registration mode is not selected.

      Tech Tips

      If any mode has been selected, it is necessary to cancel the mode.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    PERFORM REREGISTRATION

  5. 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 ECU assembly) successfully.
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

  6. READ VALUE USING GTS (VEHICLE SPEED METER)


    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 / Combination Meter / Data List.

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


      Body Electrical > Combination Meter > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Vehicle Speed Meter Vehicle speed Min.: 0, Max.: 255 Almost same as actual vehicle speed (Speedometer tester) -

      Body Electrical > Combination Meter > Data List
      Tester Display
      Vehicle Speed Meter
      OK
      "0 km/h (0 mph)" is displayed when the vehicle is stationary.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    GO TO METER / GAUGE SYSTEM Click here

  7. 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 ECU assembly) successfully.
      Result
      Result Proceed to
      OK A
      NG (w/o ID Code Box) B
      NG (w/ ID Code Box) C

    A

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

    B

    REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) for Manual Tilt and Manual Telescopic Steering Column: Click here
    REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) for Power Tilt and Power Telescopic Steering Column: Click here

    C

  8. CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY)


    1. Replace the steering lock ECU (steering lock actuator or upper bracket assembly) with a new one and register the electrical key transmitter sub-assemblies.

      for Manual Tilt and Manual Telescopic Steering Column: Click here

      for Power Tilt and Power Telescopic Steering Column: Click here

      OK
      All of the electrical key transmitter sub-assemblies could be registered to the new steering lock ECU (steering lock actuator or upper bracket assembly) successfully.
      Result
      Proceed to
      OK
      NG

    OK

    END (STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) WAS DEFECTIVE)

    NG

    REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

  9. CHECK ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY


    1. Make sure that a registered electrical key transmitter sub-assembly is being used.

      OK
      A registered electrical key transmitter sub-assembly is being used.
      Result
      Proceed to
      OK
      NG

    NG

    USE A REGISTERED ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY AND PERFORM REREGISTRATION

    OK

  10. CHECK NUMBER OF REGISTERED ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLIES


    1. Check the number of registered electrical key transmitter sub-assemblies.

      Result
      Result Proceed to
      Only one electrical key transmitter sub-assembly is registered A
      2 or more electrical key transmitter sub-assemblies are registered B

    A

    GO TO STEP 12 Click here

    B

  11. REREGISTRATION


    1. Reregister the electrical key transmitter sub-assemblies using different order combinations.

      Tech Tips


      • If there are 2 or more electrical key transmitter sub-assemblies, make sure that the number of order combinations is the same as the number of electrical key transmitter sub-assemblies so that each transmitter can be checked first.

      • Refer to Service Bulletin.

      Example: When there are 3 registered electrical key transmitter sub-assemblies (A, B and C).
      Combination Order*
      1 A → B → C
      2 B → C→ A
      3 C → A → B

      • *: Except for the first electrical key transmitter sub-assembly, the remaining electrical key transmitter sub-assemblies can be checked in any order.

      OK
      "Key Verification: Read Error" is not displayed.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY (ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY HELD WHEN "Key Verification: Read Error" WAS DETECTED WAS DEFECTIVE)

    NG

  12. REPLACE 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 ECU assembly) successfully.
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

  13. CHECK FOR ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY


    1. Check that all registered electrical key transmitter sub-assemblies are available.

      OK
      No registered electrical key transmitter sub-assemblies are missing.
      Result
      Proceed to
      OK
      NG

    NG

    ERASE ALL REGISTERED ELECTRICAL KEY TRANSMITTERS EXCEPT ONE, THEN REGISTER THE REMAINING ELECTRICAL KEY TRANSMITTERS

    OK

  14. REREGISTRATION


    1. Register the electrical key transmitter sub-assemblies using different order combinations.

      Tech Tips


      • If there are 2 or more electrical key transmitter sub-assemblies, make sure that the number of order combinations is the same as the number of electrical key transmitter sub-assemblies so that each transmitter can be checked first.

      • Refer to Service Bulletin.

      Example: When there are 3 registered electrical key transmitter sub-assemblies (A, B and C).
      Combination Order*
      1 A → B → C
      2 B → C→ A
      3 C → A → B

      • *: Except for the first electrical key transmitter sub-assembly, the remaining electrical key transmitter sub-assemblies can be checked in any order.

      OK
      "Key Verification: Read Error" is not displayed.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY (ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY HELD WHEN "Key Verification: Read Error" WAS DETECTED WAS DEFECTIVE)

  15. REREGISTRATION


    1. Using an unregistered electrical key transmitter sub-assembly, register the ID.

      Tech Tips

      Refer to Service Bulletin.

      OK
      The key ID can be registered.
      Result
      Proceed to
      OK
      NG

    OK

    END (ELECTRICAL KEY TRANSMITTER WAS DEFECTIVE)

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)