DTC B2779: Engine Starter Communication Malfunction [10/2014 - ]: Procedure

1. Turn the engine switch off.
2. Connect the Techstream to the DLC3.
3. Turn the engine switch on (IG).
4. Turn the Techstream on.
5. Enter the following menus: Body Electrical / Smart Key / Data List.
6. 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 start ECU and certification ECU (smart key ECU assembly) / No Regd or Regd	No Regd: ID not registered between remote engine start ECU and certification ECU (smart key ECU assembly) Regd: ID registered between 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.

   OK

   "Regd" is displayed on the Techstream screen.

   RESULT
   
   

   Result	Proceed to
   "No Regd" is displayed on the Techstream screen.	A
   "Regd" is displayed on the Techstream screen.	B

Result: 

B 

See step  4

Result: 

A 

See step  2

1. Register the remote start ID (Refer to REGISTRATION [10/2014 - ] ).

Result: 

NEXT 

See step  3

1. Check that the engine can be started using remote start operation (Refer to OPERATION CHECK [10/2014 - ] ).

   OK

   Engine can be started using remote start operation.

Result: 

OK 

END (REMOTE START ID WAS NOT REGISTERED CORRECTLY) 

Result: 

NG 

See step  4

HINT: 

In this repair information, only the terminal numbers used for inspection between the main body ECU (multiplex network body ECU) and option connector are listed.

1. Disconnect the D6 main body ECU (multiplex network body ECU) connector.
2. Disconnect the D67 option connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D6-25 (BTX) - D67-4 (BTX)	Always	Below 1 Ω
   D6-26 (BRX) - D67-3 (BRX)
   D6-25 (BTX) or D67-4 (BTX) - Body ground	Always	10 kΩ or higher
   D6-26 (BRX) or D67-3 (BRX) - Body ground

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

1. Temporarily replace the remote engine start ECU with a new one (Refer to REMOVAL [10/2014 - ] ).
2. Register the remote start ID (Refer to OPERATION CHECK [10/2014 - ] ).
3. Check that the engine can be started using remote start operation.

   OK

   Engine can be started using remote start operation.

Result: 

OK 

END (REMOTE ENGINE START ECU WAS DEFECTIVE) 

Result: 

NG 

See step  6

1. Temporarily replace the main body ECU (multiplex network body ECU) with a new one (Refer to REMOVAL [10/2014 - ] ).
2. Check that the engine can be started using remote start operation (Refer to OPERATION CHECK [10/2014 - ] ).

   OK

   Engine can be started using remote start operation.

Result: 

OK 

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

Result: 

NG 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 

(Refer to REMOVAL [10/2014 - 10/2015] Refer to REMOVAL [10/2015 - ] )