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:

Electrical power for lighting and signalling devices
The front and rear running lights consist of led units with light conduits. As a result, the light source is not visible as the light is diffused through the surface of the light conduit. These two images illustrate the front and rear running lights with light conduits. The figure ...

Adjusting throttle control free play
The throttle twistgrip must have free play of 1.5×2.0 Mm in all steering positions, measured on the outer edge of the twistgrip. If necessary, adjust it using the adjusters (1 and 2, fig. 135) Located on the headstock on the right-hand side of the vehicle. Adjuster (1) is for throttle o ...

Refitting the front footrests
Note The assembly of the front footrests is described only for the right one (2) but it is the same also for the left one. Place the spring (4) bringing the end (a) onto the footrest (2). Place the footrest (2) in the correct position, by inserting the end (c) of the spring (4) in the hole ...

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