DTC B2779: Engine Starter Communication Malfunction [12/2019 - 11/2023]: Procedure

1. Check for CAN communication system DTCs.

   Refer to DIAGNOSIS SYSTEM [12/2019 - 09/2020] , or refer to DIAGNOSIS SYSTEM [09/2020 - 10/2022] , or refer to DIAGNOSIS SYSTEM [10/2022 - 11/2023]

   OK

   CAN communication DTCs are not output.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO CAN COMMUNICATION SYSTEM (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
   Wireless C Code	Registration status between remote engine start ECU and certification ECU (smart key ECU assembly)	No Regd or Regd	No Regd: Remote starter ID not registered to remote engine start ECU and certification ECU (smart key ECU assembly) Regd: Remote starter ID registered to remote engine start ECU and certification ECU (smart key ECU assembly)	Problems may be caused by the following: DTC B2779 is stored. Remote engine start ECU registration has not been performed. Malfunctions in the certification ECU (smart key ECU assembly) or remote engine start ECU.

   Body Electrical > Smart Key > Data List 

   Tester Display
   Wireless C Code

   Result

   Result	Proceed to
   "No Regd" is displayed on the GTS	A
   "Regd" is displayed on the GTS	B

Result: 

B 

REPLACE REMOTE ENGINE START ECU 

Result: 

A 

See step  3

1. Register the remote engine starter ID.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  4

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
   Wireless C Code	Registration status between remote engine start ECU and certification ECU (smart key ECU assembly)	No Regd or Regd	No Regd: Remote starter ID not registered to remote engine start ECU and certification ECU (smart key ECU assembly) Regd: Remote starter ID registered to remote engine start ECU and certification ECU (smart key ECU assembly)	Problems may be caused by the following: DTC B2779 is stored. Remote engine start ECU registration has not been performed. Malfunctions in the certification ECU (smart key ECU assembly) or remote engine start ECU.

   Body Electrical > Smart Key > Data List 

   Tester Display
   Wireless C Code

   Result

   Result	Proceed to
   "No Regd" is displayed on the GTS	A
   "Regd" is displayed on the GTS	B

Result: 

A 

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

Result: 

B 

REPLACE REMOTE ENGINE START ECU