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 speed avg - average speed
This function shows the average speed of the motorcycle. The calculation is made considering the distance and time travelled since the last trip 1 reset. When trip 1 is reset, the value is set to zero and the first available value is shown on the display 10 seconds after the reset. Dashes &quo ...

Dashboard system
The vehicle is equipped with two dashboards: an lcd (1) located on the handlebar containing the key indications (speed, rpm, engine coolant temperature, and clock) and a tft colour display (2) located in the tank fairing displaying trip information (riding style set, odometer, consumption, ave ...

Running lights not working
Fault codes Dds: no fault code displayed. Dashboard: no fault code displayed. Location of connections and components (A) low / high beam and parking light connections rear running light and stop light connection. Pin numbering of wiring harness side bbs unit connection. Checks The ...

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