New Key cannot be Registered [12/2019 - 10/2021]: Procedure

1. Check for DTCs.

   Body Electrical > Smart Key > Trouble Codes 

   NOTE:

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

   OK

   DTCs are not output.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2019 - 11/2023] 

Result: 

OK 

See step  2

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

   Body Electrical > Smart Key > 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 > Smart Key > Data List 

   Tester Display
   Number of Registered Key Codes

   HINT: 

   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

Result: 

NG 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [12/2019 - 11/2023] 

Result: 

OK 

See step  3

1. Check the freeze frame data.

   Body Electrical > Smart Key > Utility 

   Tester Display
   Operation History

   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.	Certification ECU (smart key ECU assembly)	C
   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 or more.	Certification ECU (smart key ECU assembly)	D
   No ECU Response	The steering lock ECU (steering lock actuator or upper bracket assembly) was not connected.	Certification ECU (smart key ECU assembly) Steering lock ECU (steering lock actuator or upper bracket assembly)	E
   L Code Verification Error	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.	Certification ECU (smart key ECU assembly) Steering lock ECU (steering lock actuator or upper bracket assembly)	F
   Key Verification: Max Number	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)	C
   Key Verification: Amp Abnormal	Malfunction of the immobilizer amplifier, such as a short to ground.	Certification ECU (smart key ECU assembly) Engine switch	G
   Key Verification: Read Error	Although a registered electrical key transmitter sub-assembly was held near the engine switch, immobilizer function certification was not successful.	Certification ECU (smart key ECU assembly) Electrical key transmitter sub-assembly	H
   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 immobilizer function certification not being successful.	Certification ECU (smart key ECU assembly) Electrical key transmitter sub-assembly	I
   Transponder Key Amp Error	Malfunction of the immobilizer amplifier, such as a short to ground.	Certification ECU (smart key ECU assembly) Engine switch	G
   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 immobilizer function certification not being successful.	Certification ECU (smart key ECU assembly) Electrical key transmitter sub-assembly	J
   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	J
   New Key Registration Failed	After successful immobilizer 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	J
   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)	K
   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	The certification ECU (smart key ECU assembly) or steering lock ECU (steering lock actuator or upper bracket assembly) was not connected.	Certification ECU (smart key ECU assembly) Steering lock ECU (steering lock actuator or upper bracket assembly)	E
   L Code Verification NG	The L code could not be stored by the steering lock ECU (steering lock actuator or upper bracket assembly).	Certification ECU (smart key ECU assembly) Steering lock ECU (steering lock actuator or upper bracket assembly)	F
   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
   New Key ID Registration Stopped (Security Access Malfunction)	Communication error	Communication error between the GTS and key registration server	L
   New Key ID Registration Stopped (Certification ECU Type Malfunction)	The electrical key transmitter sub-assembly is not compatible with the certification ECU (smart key ECU assembly).	Certification ECU (smart key ECU assembly)	B
   New Key ID Registration Stopped (Key Type Malfunction)	The electrical key transmitter sub-assembly is not compatible with the registration mode.	Electrical key transmitter sub-assembly	M

Result: 

B 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [12/2019 - 11/2023] 

Result: 

C 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [12/2019 - 11/2023] 

Result: 

D 

See step  5

Result: 

E 

CHECK FOR DTC B2785. Refer to  DTC B2785: Communication Malfunction between ECUs Connected by LIN [12/2019 - 10/2021] 

Result: 

F 

See step  6

Result: 

G 

CHECK FOR DTC B278A or B2784. Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2019 - 10/2021] 

Result: 

H 

See step  7

Result: 

I 

See step  11

Result: 

J 

See step  13

Result: 

K 

NEW KEY REGISTRATION FAILED, CHECK THE KEY 

1. 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.
2. 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).

Result: 

L 

CHECK GTS 

1. Check communication between the GTS and the key registration server.

Result: 

M 

REREGISTRATION 

1. Replace the electrical key transmitter sub-assembly, register the ID.

   Refer to REGISTRATION [12/2019 - 10/2021]

Result: 

A 

See step  4

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

   OK

   Another mode or a different registration mode is not selected.

   HINT: 

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

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [12/2019 - 11/2023] 

Result: 

NG 

PERFORM REREGISTRATION. Refer to  REGISTRATION [12/2019 - 10/2021] 

1. 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

Result: 

OK 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [12/2019 - 11/2023] 

Result: 

NG 

GO TO METER / GAUGE SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ] 

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 [12/2019 - 11/2023]

   • For registration.

     Refer to REGISTRATION [12/2019 - 10/2021]

   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 

REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY). Refer to  DISASSEMBLY [12/2019 - 10/2021] 

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

Result: 

NG 

USE A REGISTERED ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY AND PERFORM REREGISTRATION. Refer to  REGISTRATION [12/2019 - 10/2021] 

Result: 

OK 

See step  8

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

Result: 

A 

See step  10

Result: 

B 

See step  9

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

   Refer to REGISTRATION [12/2019 - 10/2021]

   HINT: 

   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.

   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

   1. *: 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

Result: 

OK 

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

Result: 

NG 

See step  10

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 [12/2019 - 11/2023]

   • For registration.

     Refer to REGISTRATION [12/2019 - 10/2021]

   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 

REPLACE 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

Result: 

NG 

ERASE ALL REGISTERED ELECTRICAL KEY TRANSMITTERS EXCEPT ONE, THEN REGISTER THE REMAINING ELECTRICAL KEY TRANSMITTERS. Refer to  REGISTRATION [12/2019 - 10/2021] 

Result: 

OK 

See step  12

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

   Refer to REGISTRATION [12/2019 - 10/2021]

   HINT: 

   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.

   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

   1. *: 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

Result: 

OK 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [12/2019 - 11/2023] 

Result: 

NG 

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

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

   Refer to REGISTRATION [12/2019 - 10/2021]

   OK

   The key ID can be registered.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (ELECTRICAL KEY TRANSMITTER WAS DEFECTIVE) 

Result: 

NG 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [12/2019 - 11/2023]