Fault Indication - Ducati Diavel Workshop Manual

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Introduction to the electrical system of the Diavel
sequences of impulses received from on the CAN H and CAN L wires independently. This ensures superior reliability, as
any interference in the electrical signals is effectively subtracted and eliminated.
One drawing shows the typical voltages on the CAN H and CAN L wires for each electrical impulse contained in the train
"transporting" information shared by the nodes connected to the network. The other drawing shows the signal
extrapolated by each node from the difference between the two former signals.
In short, the advantages of using the CAN bus are as follows:
- Only two wires are used (CAN H and CAN L)
- The architecture of the network independent from the configuration of the system or, in other terms, the number of
nodes (computers) connected to the network itself
- The network is highly fault-tolerant
- The network is capable of handling node errors and/or faults effectively
- The network ensures reliable message delivery times by applying a priority system
Note that the control function for the electrical impulses travelling over the CAN network has no validity for diagnostic
purposes, as the information contained in the trains themselves cannot be identified.

Fault indication

The DDS (Diagnosis Ducati System) indicates all active errors and all inactive but stored errors gathered by the BBS. A
simplified summary of the active errors is also shown in the Master dashboard service display when the dashboard is
switched on. Simultaneously, the EOBD warning light is also activated, independently of the types of the errors
themselves. In the event of more than one active error, the errors are shown cyclically on the service display for 3
seconds each.
In the event of a CAN line fault (CAN OFF), the dashboard cannot transmit data and the electrical system behaves as
follows:
- The dashboard service display shows the message "CAN error"
- All lights on the handlebar dashboard must light up and flash
- The turn indicators are flashing
- The DDS shows the message "CAN diagnosis BUS off"
If the CAN line fault is no longer present (fault resolved), normal operation is resumed and the CAN error disappears from
the tank dashboard.
Other faults relative to the CAN line and indicated on the tank dashboard and by activation of the EOBD warning light, are
described as follows:
- DEVICE ECU the ECU node (engine control unit) is not recognised by the network or is not communicating with the
network. In this case, the DDS may display the following messages relative to ECU function diagnosis: ECU counter, ECU
no frame, ECU not compatible
- DEVICE DASHBOARD (there are two Dashboards: Master and Slave Dash Boards) the Dashboard node is not recognised
by the network or is not communicating with the network. In this case, the DDS may display the following messages
relative to Dashboard function diagnosis: Dashboard counter, Dashboard no frame, Dashboard not compatible
- DEVICE HANDS FREE the Hands Free node (facilitated keyless start system) is not recognised by the network or is not
communicating with the network. In this case, the DDS may display the following messages relative to Hands Free
function diagnosis: Hands free counter, Hands free no frame, Hands free not compatible
- DEVICE ABS ERROR
- BBS/DTC DEVICE this message is transmitted by the engine control unit to the dashboard and indicates that the BBS is
not recognised by the network or is not communicating with the network. In this case, the DDS may display the following
messages relative to BBS/DTC function diagnosis: BBS/DTC counter, BBS/DTC no frame
- DEVICE SW COMPATIBILITY ERROR-UNKNOWN DEVICE the BBS detects an incompatible device

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