New Key cannot be Registered [07/2020 - 12/2021]: 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 [07/2020 - 12/2021] 

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 7	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 [07/2020 - ] 

Result: 

OK 

See step  3

1. Read the Vehicle Control History (RoB) according to the display on the GTS.

   Body Electrical > Smart Key > Utility 

   Tester Display
   Vehicle Control History (RoB)

2. Check the freeze frame data.

   Registration Function (Reason for Non-operation)

   Parameter Name	Detection Condition	Trouble Area	Proceed to
   Cannot Enter 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
   Cannot Enter Registration Mode (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
   Registration Limit	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) ID code box (immobilizer code ECU)	C
   Cannot Enter Registration Mode (ID Code Box Availability Not Confirmed)	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 (immobilizer code ECU)	D
   Cannot Enter Registration Mode (Vehicle Speed > 5 km/h) (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
   ECU Code Confirmation Failed (No Response from Connected ECUs)	The steering lock ECU (steering lock actuator or upper bracket assembly) was not connected.	Certification ECU (smart key ECU assembly) ID code box (immobilizer code ECU) Steering lock ECU (steering lock actuator or upper bracket assembly)	F
   ECU Code Confirmation Failed (L Code Certification Failed)	The L codes registered in the ID code box (immobilizer code ECU) and steering lock ECU (steering lock actuator or upper bracket assembly) did not match.	Certification ECU (smart key ECU assembly) ID code box (immobilizer code ECU) Steering lock ECU (steering lock actuator or upper bracket assembly)	G
   ECU Code Confirmation Failed (L Code Succeeded, S Code Failed)	L code verification was successful but the S code stored in the ID code box (immobilizer code ECU) and certification ECU (smart key ECU assembly) did not match.	Certification ECU (smart key ECU assembly) ID code box (immobilizer code ECU)	C
   ECU Code Confirmation Failed (Too Many Keys Registered in ID Code Box)	The number of electrical key transmitter sub-assemblies registered in the ID code box (immobilizer code ECU) was more than 7.	ID code box (immobilizer code ECU)	H
   Confirmation Failed for All Registered Keys (Immobilizer Certification Failed)	All of the registered electrical key transmitter sub-assemblies were incorrectly held near the power switch and the certification ECU (smart key ECU assembly) could not complete verification.	Certification ECU (smart key ECU assembly) Power switch	J
   Confirmation Failed for All Registered Keys (Some Keys Unconfirmed)	Although all of the registered electrical key transmitter sub-assemblies had been held near the power 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	K
   Confirmation Failed for All Registered Keys (Key Information Malfunction)	All of the registered electrical key transmitter sub-assemblies were held near the power switch, but key ID information was not stored by the certification ECU (smart key ECU assembly).	Key registration failure	I
   New Key ID Registration Failed (Immobilizer Certification Failed)	Although an unregistered electrical key transmitter sub-assembly was held near the power 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	I
   New Key ID Registration Failed (Vehicle ID did not Match)	Although an unregistered electrical key transmitter sub-assembly was held near the power 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 ID Registration Failed (Conditions Other than Vehicle ID not Met)	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	L
   New Key ID Registration Failed (Key Already Registered)	Although a registered electrical key transmitter sub-assembly was held near the power switch, time expired or a registration cancellation request was sent.	Certification ECU (smart key ECU assembly)	M
   New Key ID Registration Failed (ID Code Writing Failed)	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
   New Key ID Registration Failed (Key Information Malfunction)	An unregistered electrical key transmitter sub-assembly was held near the power switch, but key ID information was not stored by the certification ECU (smart key ECU assembly).	Key registration failure	L
   No Response from Connected ECUs when Registering L/S/F Codes	The certification ECU (smart key ECU assembly), ID code box (immobilizer code ECU) or steering lock ECU (steering lock actuator or upper bracket assembly) was not connected.	Certification ECU (smart key ECU assembly) ID code box (immobilizer code ECU) Steering lock ECU (steering lock actuator or upper bracket assembly)	F
   S Code Registration Failed (Certification ECU, ID Code Box)	The S code could not be stored by the certification ECU (smart key ECU assembly) or ID code box (immobilizer code ECU).	Certification ECU (smart key ECU assembly) ID code box (immobilizer code ECU)	C
   L Code Registration Failed (ID Code Box, Steering Lock ECU)	The L code could not be stored by the steering lock ECU (steering lock actuator or upper bracket assembly) or ID code box (immobilizer code ECU).	Certification ECU (smart key ECU assembly) ID code box (immobilizer code ECU) Steering lock ECU (steering lock actuator or upper bracket assembly)	G
   ECU ID Verification Error	The code received from the ID code box (immobilizer 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 (immobilizer 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 Code Registration Failed (Certification ECU, Main Body ECU)	B code was not stored by the certification ECU (smart key ECU assembly).	Main body ECU (multiplex network body ECU) Certification ECU (smart key ECU assembly)	N
   New Key ID Registration Stopped (Security Access Malfunction)	Communication error	Communication error between the GTS and key registration server	O
   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. The electrical key transmitter sub-assembly is not compatible with the certification ECU (smart key ECU assembly).	Electrical key transmitter sub-assembly	P

Result: 

B 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [07/2020 - ] 

Result: 

C 

See step  5

Result: 

D 

CHECK FOR DTC B2789-87. Refer to  DTC CHECK / CLEAR [07/2020 - ] 

Result: 

E 

See step  6

Result: 

F 

CHECK FOR DTC B2785-88. Refer to  DTC CHECK / CLEAR [07/2020 - ] 

Result: 

G 

See step  7

Result: 

H 

REPLACE ID CODE BOX (IMMOBILIZER CODE ECU). Refer to  REMOVAL [07/2020 - 10/2022] 

Result: 

I 

CHECK FOR DTC B2784-1C, B278E-87. Refer to  DTC CHECK / CLEAR [07/2020 - 12/2021] 

Result: 

J 

See step  9

Result: 

K 

See step  13

Result: 

L 

See step  15

Result: 

M 

NEW KEY REGISTRATION FAILED, CHECK THE KEY 

1. Check if a registered electrical key transmitter sub-assembly was held near the power 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: 

N 

See step  16

Result: 

O 

PERFORM REREGISTRATION 

Result: 

P 

REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY 

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

   Refer to REGISTRATION [07/2020 - 12/2021]

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 [07/2020 - ] 

Result: 

NG 

PERFORM REREGISTRATION 

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 [07/2020 - ]

   • For registration.

     Refer to REGISTRATION [07/2020 - 12/2021]

   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 ID CODE BOX (IMMOBILIZER CODE ECU). Refer to  REMOVAL [07/2020 - 10/2022] 

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 [07/2020 - ] 

Result: 

NG 

GO TO METER / GAUGE SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [07/2020 - ] 

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 [07/2020 - ]

   • For registration.

     Refer to REGISTRATION [07/2020 - 12/2021]

   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 

See step  8

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.

   Refer to DISASSEMBLY [07/2020 - 12/2021]

   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

Result: 

OK 

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

Result: 

NG 

REPLACE ID CODE BOX (IMMOBILIZER CODE ECU). Refer to  REMOVAL [07/2020 - 10/2022] 

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 

Result: 

OK 

See step  10

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  12

Result: 

B 

See step  11

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

   Refer to REGISTRATION [07/2020 - 12/2021]

   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 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  12

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 [07/2020 - ]

   • For registration.

     Refer to REGISTRATION [07/2020 - 12/2021]

   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 

Result: 

OK 

See step  14

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

   Refer to REGISTRATION [07/2020 - 12/2021]

   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 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 [07/2020 - ] 

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 [07/2020 - 12/2021]

   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 [07/2020 - ] 

1. Temporarily replace the main body ECU (multiplex network body ECU) with a new one and register the electrical key transmitter sub-assemblies.

   HINT: 

   • For replacement.

     Refer to REMOVAL [07/2020 - 10/2022]

   • For registration.

     Refer to REGISTRATION [07/2020 - 12/2021]

   OK

   All of the electrical key transmitter sub-assemblies could be registered to the new main body ECU (multiplex network body ECU) successfully.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) WAS DEFECTIVE) 

Result: 

NG 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [07/2020 - ]