Scania fault code 779
Code 779 is used by 9 different Scania systems. Choose the control unit shown in your diagnostic tool:
EMS Engine Management System
Steering wheel switch for cruise control, CAN messages missing
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COO Coordinator
Forward looking camera (FLC)
CAN communication with forward looking camera (FLC) is interrupted.
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MBS
Sensor for front hatch fuel tank, open circuit
The voltage supply to the control unit input for the front fuel tank hatch sensor is 12 V. This indicates an open circuit.
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DDU
VIS control unit, no CAN communication
The DDU control unit is not receiving CAN messages from the VIS control unit.
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ICL Instrument Cluster
Communication with the visibility system (VIS)
No CAN messages from the visibility system.
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CMS
Fuel level monitor for fuel optimisation unit, broken circuit
The fuel level monitor circuit is open.
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DAS
Forward looking camera
CAN communication with the forward looking camera (FLC) is interrupted.
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COMMUNICATOR Communicator (C200 / C300 / C400)
Communication with the bus chassis system (BCS)
The RTC control unit has not received any CAN messages from the BCS control unit within the time expected.
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DCU
Long activation of sensing strip, front or single door leaf, active
The door control unit detects a permanent activation (CN3-11) of the sensing strip which lasts more than 20 seconds.
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