Ducati Diavel Service Manual: 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).

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

Fault indication

If the dashboard receives the "gear" error information via the can line:

• The error is indicated on the dashboard service display.
• The dashboard shows dashes in the gear indicator display instead of the gear engaged.

If the dashboard does not receive the gear or neutral engaged information via the can line:

• The error "gear sensor" is not indicated on the dashboard service display.
• The dashboard causes the neutral indicator to flash

If the dashboard receives incorrect gear engaged information (flashing dashes) via the can line with the engine running:

• The dashboard shows flashing dashes in the gear indicator display.

Warning

It is possible that the gear engaged or neutral engaged information is not being generated because the gear position self-acquisition procedure has not been performed (gear sensor not initialised).

Wiring diagram

Bbs bbs unit connection, s gear position sensor. Bbs 15 brown/red - br/r (5v), bbs 13 yellow/green y/g, bbs 10 black/blue - bk/b.

Location of connections and components

Location of gear sensor connection

Pin numbering of wiring harness side bbs unit connection.

Checks

The gear sensor is a hall effect unit. Ground is on pin 10 of the bbs unit, 5 v power is on pin 15 of the bbs unit, pin 13 of the bbs is the input for the signal generated by the sensor. Check that the sensor receives 5 v power.

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

Perform the gear self-acquisition procedure.

If none of the aforementioned tests identify the problem, replace the gear sensor then perform the gear self-acquisition procedure. If the fault has not been resolved, replace the bbs unit.

Warning

The engine control unit uses the neutral engaged signal generated by the gear sensor, together with the clutch lever pulled signal, to manage idle speed.

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.

Gear self-acquisition procedure

The gear self-acquisition procedure must be launched from the dds instrument. This ensures that the data stored previously is deleted and enables the bbs to run a new gear acquisition procedure. With the engine running and the motorcycle in motion:

• Select neutral, pulling the clutch lever completely, dashes "- -" appear in the gear indicator display. Release the clutch, the letter "c" appears in the display. Keep the motorcycle in this gear for at least five seconds. Then, engage first gear.
• Repeat the above procedure through all the gears, up to sixth gear.
• Downshift through the gears from sixth to first, pulling the clutch lever completely before and releasing after each gear change.
• Reselect neutral and keep in neutral for at least five seconds, repeatedly pulling the clutch lever completely and releasing.
• Shift up through the gears from first to sixth, pulling the clutch lever completely.
• Downshift through all gears to neutral and switch off the motorcycle.
• The self-acquisition procedure is complete.