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:

Reassembly of rear shock absorber - rocker arm - linkage assembly
Once the needle roller bearings (9) have been removed from the rocker arm (18), upon reassembly fit a new needle roller bearing (9) on drift part no. 88713.1071 And lubricate with recommended grease. Support the rocker arm and drive the needle roller bearings into the rocker arm bore until t ...

Refitting the front brake master cylinder
Insert the front brake master cylinder unit (1) on the right side of the handlebar to bring the terminal internal edge in correspondence to the bolted joints (a). Fit the terminal (12) on the handlebar inserting the screws (15). Tighten the terminal (12) retaining screws to a torque of 10 ...

Refitting the swingarm
Apply the recommended threadlocker to the screws (7). Install the lower chain guard (15) on the swingarm (8), fastening it with the screws (7): tighten the screws (7) to a torque of 4 nm +/- 10% (sect. 3 - 3, Frame torque settings). Locate the swingarm (8) on the frame. Lubricate with ...

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