DTC B2779: Engine Starter Communication Malfunction [08/2019 - ]: Procedure

1. Check for CAN communication system DTCs.

   Refer to DIAGNOSIS SYSTEM [08/2019 - ]

   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 [08/2019 - ] 

Result: 

OK 

See step  2

1. Connect the Techstream to the DLC3.
2. Turn the engine 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.
   SMART KEY
   
   

   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.

   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 [08/2019 - ]

   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 [08/2019 - ]

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 [08/2019 - ]

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 [08/2019 - ]