Additional Key cannot be Registered: Procedure

CHECK FOR DTC
1. Check for DTCs. Refer to DTC CHECK / CLEAR .
  NOTE:
  If a malfunction occurs, do not remove/install the vehicle auxiliary battery before checking for DTCs.
  
  OK
  
  DTC is not output.
NG → See step 5

OK: Go to next step
CHECK STEERING LOCK SYSTEM
1. Check that the steering wheel unlocks.
  OK
  
  The steering wheel unlocks.
  
  HINT:
  
  Check that the communication between the steering lock ECU (steering lock actuator assembly) and certification ECU (smart key ECU assembly) is normal.
NG → See step 6

OK: Go to next step
REGISTRATION
1. Using other unregistered electrical key transmitter sub-assemblies, perform the additional registration procedure.
  OK
  
  Additional registration can be completed.
NG → See step 4

OK → See step 7
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 to the new ECU.
  HINT:
  - For replacement. Refer to REGISTRATION .
  - For registration. Refer to REGISTRATION .
  OK
  
  The key ID can be registered.
NG → See step 8

OK → END (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) WAS DEFECTIVE)
GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART
GO TO STEERING LOCK SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING
REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY. Refer to REGISTRATION
GO TO New key cannot be Registered. Refer to New Key cannot be Registered