DTC B2779: Engine Starter Communication Malfunction [11/2018 - ]: Procedure

1. Check for CAN communication system DTCs.

   Refer to DIAGNOSIS SYSTEM [11/2018 - 02/2019] , or refer to DIAGNOSIS SYSTEM [02/2019 - 10/2019] , or refer to DIAGNOSIS SYSTEM [10/2019 - 06/2020] , or refer to DIAGNOSIS SYSTEM [06/2020 - 08/2020] , or refer to DIAGNOSIS SYSTEM [08/2020 - 12/2021] , or refer to DIAGNOSIS SYSTEM [12/2021 - 10/2022] , or refer to DIAGNOSIS SYSTEM [10/2022 - 10/2023] , or refer to DIAGNOSIS SYSTEM [10/2023 - 11/2024] , or refer to DIAGNOSIS SYSTEM [11/2024 - ]

   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 [11/2018 - 02/2019] , or refer to DIAGNOSTIC TROUBLE CODE CHART [02/2019 - ]

Result: 

OK 

See step  2

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

   Body Electrical > Smart Key > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Wireless C Code	Registration status between remote engine starter 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 Techstream	A
   "Regd" is displayed on the Techstream	B

Result: 

B 

See step  5

Result: 

A 

See step  3

1. Register the remote engine starter ID.

   HINT: 

   Refer to Registration.

   Refer to REGISTRATION [11/2018 - 10/2019] , or refer to REGISTRATION [10/2019 - 12/2021] , or refer to REGISTRATION [12/2021 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  4

1. Check the remote engine starter function.

   OK

   Remote engine starter functions operate normally.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (REMOTE ENGINE STARTER ID WAS NOT REGISTERED) 

Result: 

NG 

See step  5

1. Temporarily replace the remote engine starter ECU with a new one.
2. Register the remote engine starter ID.

   HINT: 

   Refer to Registration.

   Refer to REGISTRATION [11/2018 - 10/2019] , or refer to REGISTRATION [10/2019 - 12/2021] , or refer to REGISTRATION [12/2021 - ]

3. Check the remote engine starter function.

   OK

   Remote engine starter functions operate normally.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (REMOTE ENGINE STARTER ECU WAS DEFECTIVE) 

Result: 

NG 

See step  6

1. Replace the main body ECU (multiplex network body ECU) with a new one.

   Refer to REMOVAL [11/2018 - 02/2019] , or refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020] , or refer to REMOVAL [08/2020 - 12/2021] , or refer to REMOVAL [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

2. Check the remote engine starter function.

   OK

   Remote engine starter functions operate normally.

   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 [11/2018 - 02/2019] , or refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020] , or refer to REMOVAL [08/2020 - 12/2021] , or refer to REMOVAL [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]