Ducati Diavel
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Ducati Diavel Service Manual: Exhaust by-pass valve not working correctly

Fault codes

Dds: exvl diagnosis -> position error, potentiometer, short circuit to ground or open circuit (s.C. Gnd or c.O.), Potentiometer short circuited to vdc (potentiometer s.C vdc).

Dashboard: the error "exvl" (exhaust bypass valve) is shown on the service display. The eobd warning light activates.

Wiring diagram

Exhaust by-pass valve not working correctly


M exhaust bypass valve motor with potentiometer s for position detection, bbs bbs unit connection. 10 Bbs black/blue - bk/b, 15 bbs brown/red - bn/r, 4 bbs yellow/blue - y/b, 18 bbs black/orange - bk/o, 19 bbs black/white - bk/w.

Location of connections and components

Location of connections and components


Exhaust bypass valve connection.

Exhaust by-pass valve not working correctly


The image shows the exhaust system. The oxygen sensor for the horizontal cylinder (1) is visible on the right, the oxygen sensor for the vertical cylinder (2) is on the left. The catalytic converter is contained within the silencer, while the by-pass valve is installed in the section of pipe connecting the silencer to the twin tailpipes. A metal cable, controlled by an actuator with electric motor and a position sensor, branches off from the exhaust bypass valve.

Exhaust by-pass valve not working correctly


Pin numbering of wiring harness side bbs unit connection

Stop light not working
Fault codes Dds: stop light diagnosis -> stop light error (generic stop light malfunction indication). Dashboard: the error "stop light" is shown on the service display. The eobd warning li ...

Diagnostic instruments
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Other materials:

Reassembling the clutch
Position the spacer (13). Fit the flat ring (11) and the belleville washer (10) on the clutch center (12), so that the convex side faces the clutch drum. Locate the belleville washer (8). Apply the prescribed grease to the thread of the gearbox primary shaft and the mating surfac ...

Removing the silencer
Loosen the clamp (38) that retains the silencer (4) to the complete exhaust system. While holding the nut (8), loosen the screw (1) and remove the silencer (4) from the motorcycle. Loosen the screws (40) and remove the silencer guard (41). ...

Reassembling the front footrest brackets
To remove the front rh footrest bracket (6) it is necessary to remove the rear brake master cylinder reservoir (by leaving it connected to the braking system), and the rear brake lever from the bracket (sect. 7 - 4, Removing of the rear brake control). To remove the front rh footrest bracke ...

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