DESCRIPTION If the remote
engine start ECU does not respond to the certification ECU (smart key
ECU assembly) or the remote engine start ID is not registered, this DTC
is stored. HINT: Registration status of the remote engine start ECU ID can be checked using the "Wireless C Code" item in the Data List. |
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
Note | | B2779 |
Engine Starter Communication Malfunction |
One of the following conditions is met (1 trip detection logic*):
- A remote start communication error occurs.
- Response is not possible.
- Registration has not been performed.
|
- CAN communication system
- Remote engine start ECU
- Certification ECU (smart key ECU assembly)
| DTC output confirmation operation:
- A remote start operation is performed.
|
- *: Only output while a malfunction is present.
Vehicle Condition and Fail-safe Operation when Malfunction Detected |
Vehicle Condition when Malfunction Detected |
Fail-safe Operation when Malfunction Detected | |
Hybrid control system does not start with remote start operation |
Hybrid control system cannot be started by remote start operation only | Related Data List and Active Test |
DTC No. | Data List and Active Test | |
B2779 | Smart Key
- Wireless Starter Com ID
- Wireless C Code
| CAUTION / NOTICE / HINT
NOTICE:
- When using the Techstream with the power switch off, connect the
Techstream to the DLC3 and turn a courtesy light switch on and off at
intervals of 1.5 seconds or less until communication between the
Techstream and the vehicle begins. Then select the vehicle type under
manual mode and enter the following menus: Body Electrical / Smart Key.
While using the Techstream, periodically turn a courtesy light switch on
and off at intervals of 1.5 seconds or less to maintain communication
between the Techstream and the vehicle.
- Before performing the inspection, check that DTC B1242 (wireless door lock control system) is not output.
- Before replacing the certification ECU (smart key ECU assembly), refer to Registration.
Click here 
- After performing repairs, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
PROCEDURE |
1. | CHECK CAN COMMUNICATION SYSTEM |
(a) Check for CAN communication system DTCs. Click here
OK: CAN communication DTCs are not output.
| NG |
 | GO TO CAN COMMUNICATION SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) |
|
OK |
 | |
| 2. |
READ VALUE USING TECHSTREAM (WIRELESS C CODE) |
(a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG).
(c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Smart Key / Data List.
(e) 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 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 | Proceed to | |
"No Regd" is displayed on the Techstream |
A | | "Regd" is displayed on the Techstream |
B |
| B |
| REPLACE REMOTE ENGINE START ECU |
|
A | |
| |
| 3. |
REGISTER REMOTE ENGINE STARTER ID | (a) Register the remote engine starter ID.
|
NEXT | |
| |
| 4. |
READ VALUE USING TECHSTREAM (WIRELESS C CODE) |
(a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG).
(c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Smart Key / Data List.
(e) 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 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 | Proceed to | |
"No Regd" is displayed on the Techstream |
A | | "Regd" is displayed on the Techstream |
B |
| A |
| REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
| B |
| REPLACE REMOTE ENGINE START ECU | | 
