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:

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 ...

Reassembling the water radiator unit
The procedure is the same for both radiators. Check the presence of clips (1) at the positions of the external coolant radiator cover (23). If removed, fit the front turn indicator (32) on the cover (23) and tighten the screws (27) to 2 nm +/- 10% (sect. 3 - 3, Frame torque settings). No ...

Gear change pedal
When released, the gear change pedal (1, fig. 96) Automatically returns to rest position n in the centre. This is indicated by the instrument panel light n (2, fig. 4) Coming on. The pedal can be moved: down = press down the pedal to engage the 1st gear and to shift down. At this point the n ...

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