Ducati Diavel
Free Service and Repair manuals

Ducati Diavel Service Manual: Dashes shown instead of speed indication or indicated speed is incorrect

Ducati Diavel Service Manual / Electric system and engine control system / Bbs and db faults / Dashes shown instead of speed indication or indicated speed is incorrect

Fault codes

Dds: speed sensor diagnosis -> max. Speed (max. Speed error - signal not correct) - minimum speed (min speed error - signal not correct) - congruence (correlation speed error - signal not correct).

Dashboard: the error "speed sensor" is shown on the service display. The eobd warning light activates.

Fault indication

If the dashboard does not receive "vehicle speed" information via the can line:

If:

Or

The error "speed sensor" is shown on the dashboard service display.

Warning

The dashboard speed indicator also displays fixed dashes if vehicle speed exceeds 299 km/h.

Warning

Dtc is disabled in the event of a wheel speed sensor erro

r.

Wiring diagram

Dashes shown instead of speed indication or indicated speed is incorrect


Bbs bbs unit connection, db dashboard connection, abs abs connection. Bbs 14 green/purple - g/v, db 9 blue - b.

Dashes shown instead of speed indication or indicated speed is incorrect


Pin numbering for wiring harness side dashboard connector.

Dashes shown instead of speed indication or indicated speed is incorrect


Pin numbering of wiring harness side bbs unit connection.

Checks

For diagnosing wheel speed sensors, consult the section relative to diagnosing the abs unit.

Check the integrity of the electrical circuit and connections (short-circuits to ground, short-circuits to vdc, open circuits).

If the above test did not identify the problem, contact ducati.

Note

Check integrity of electric circuit - short-circuit to vdc = with dashboard on, using a voltmeter, a voltage is measured between the wire tested and ground.

Check integrity of electric circuit - short-circuit to ground = with the battery cables disconnected, using an ohmmeter, continuity is detected between the wire tested and ground.

Check integrity of electric circuit - open circuit = with the battery cables disconnected, using an ohmmeter, no continuity is detected between the two ends of the wire tested.

Propagation of wheel speed signals and generation of vehicle speed signal

Propagation of wheel speed signals and generation of vehicle speed signal


The diagram illustrates how the vehicle speed information is generated and how it is transmitted to the dashboard.

Using the replicated rear wheel speed signal and the circumference of the wheel itself, the bbs unit calculates the vehicle speed (2 in diagram). This parameter is used by the ducati traction control (dtc) function together with the front wheel speed and the circumference of the front wheel itself, in order to implement engine torque limiting strategies when required.

The vehicle speed calculated by the bbs is transmitted over the can line (3 in diagram) and acquired by the dashboard, which displays the speed information accordingly.

Gear indicator display on dashboard shows dashes, engaged gear not displayed correctly, idle speed irregular with gearbox in neutral
Fault codes Dds: gear sensor diagnosis -> short circuit to ground or open circuit (s.C. Gnd or c.O.) - Short circuit to vdc (s.C. Vdc) - congruence (generic error - signal not correct). Dash ...

Abs fault indicator not working
Fault codes Dds: displays a fault code described in the description of the abs system. Dashboard: no fault code displayed. Wiring diagram Checks The abs fault indicator indicates the occurr ...

Other materials:

Refitting the front mudguard
Warning Do not use the motorcycle without the front mudguard fitted to avoid the risk of the brake pipes fouling the wheel on braking. Insert the screws (5) in spacers (6) with recommended threadlocker, as shown in the figure. Position the front mudguard (1) and start the special screws (5 ...

Indicator trip time - trip time
This function shows the vehicle trip time. The calculation is made considering the time travelled since the last trip 1 reset. When trip 1 is reset, the value is set to zero. The active phase calculation occurs when the engine is running and the vehicle is stopped (when the vehicle is not ...

Dds diagnosis instrument
The main functions of the dds diagnosis instrument can be summarised as follows: Retrieval of errors (faults) of the ignition-injection system stored in the engine control unit memory and their subsequent deletion, if required. Reading of engine parameters (rpm, coolant and air temperat ...

2021 | www.dudiavel.com |