LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2020 >> RAV4 XLE, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 181 (Smart Key System (For Start, HV) - Diagnostic Codes (1 Of 2)) >> SMART KEY SYSTEM (for Start Function, HV Model) >> DTC B2779: Engine Starter Communication Malfunction [11/2018 - ] >> Description

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

WARNING: This page is about a different variant/trim than selected.

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.

If communication between the remote engine start ECU and the certification ECU (smart key ECU assembly) is established and the remote engine start is operated, this DTC and the corresponding history DTC will be cleared.

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 When the remote engine start is operated to try to turn the power source on, or start the engine, the remote start function tries to communicate with the certification ECU (smart key ECU assembly), but communication fails. (1 trip detection logic*)
  • CAN communication system
  • Remote start ECU (genuine part)
  • Main body ECU (multiplex network body ECU)
  • Certification ECU (smart key ECU assembly)
DTC output confirmation operation:
  1. Always
  1. *: Only detected 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
The hybrid control system cannot be started with a remote start operation The hybrid control system cannot be started with a 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