Additional Key cannot be Registered [09/2015 - ]: Procedure

1. Check for DTCs.

   Body Electrical > Smart Access > Trouble Codes 

   OK

   DTCs are not output.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2015 - 12/2017]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2017 - ] 

Result: 

OK 

See step  2

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG)
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Smart Access / Data List.
5. Read the Data List according to the display on the Techstream.

   Body Electrical > Smart Access > 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 > Smart Access > Data List 

   Tester Display
   Unmatched Vehicle-ID

   Result

   Result	Proceed to
   "No" is displayed	A
   "Yes" is displayed	B

Result: 

B 

See step  4

Result: 

A 

See step  3

1. Check that the steering unlocks.

   Refer to SYSTEM DESCRIPTION [09/2015 - ]

   HINT: 

   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

Result: 

NG 

GO TO STEERING LOCK SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2015 - ] 

Result: 

OK 

See step  4

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

   Refer to REGISTRATION [09/2015 - 08/2019] , or refer to REGISTRATION [08/2019 - 07/2021] , or refer to REGISTRATION [07/2021 - ]

   OK

   Additional registration can be completed.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

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

Result: 

NG 

See step  5

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

   HINT: 

   • For replacement.

     Refer to REMOVAL [09/2015 - 08/2016] , or refer to REMOVAL [08/2016 - 08/2019] , or refer to REMOVAL [08/2019 - ]

   • For registration.

     Refer to REGISTRATION [09/2015 - 08/2019] , or refer to REGISTRATION [08/2019 - 07/2021] , or refer to REGISTRATION [07/2021 - ]

   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

Result: 

OK 

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

Result: 

NG 

GO TO OTHER PROBLEM (New key cannot be Registered). Refer to  New Key cannot be Registered [09/2015 - ]