Ducati Scrambler 800 - Service manual > Main relay and injection

To remove and refit the main relay, refer to chapter "Starting system".

Timing/rpm sensor

The engine rpm sensor (1) is an inductive sensor that detects the teeth of a phonic wheel by means of an alternate signal proportional to the teeth passage speed.

The toothed pulley usually features "Xn teeth with a gap of two teeth" as reference for the first cylinder TDC.

Position 1: the pick-up sensor detects the "full area" (i.e. the tooth);

Position 2: the pick-up sensor detects the "empty area" (i.e. the gap between the teeth).

The engine rpm sensor (pick-up sensor) is located on the engine left side.

Connector (2) is located above sensor (1).

Check for rpm/timing sensor (pick-up) correct operation with the diagnosis instrument DDS 2.

Electric diagram

Throttle position potentiometer (TPS)

The TPS (Throttle Position Sensor) (1) is a potentiometer installed on the throttle body.

The TPS sends information to the control unit about the exact position of the throttle.

To remove and refit the TPS, refer to chapters "Removing the airbox and throttle body" and "Refitting the airbox and throttle body".

Check for TPS correct operation with the diagnosis instrument DDS 2.

TPS electric diagram

Coil

The ignition coil increases the input voltage of the current alternator and brings the voltage to a value that allows the spark creation in the spark plug.

The vehicle features two coils, one for the horizontal cylinder (1) and another for the vertical cylinder (2), located under the covers (3) and (4).

REMOVAL PROCEDURE

To reach the coils remove covers (3) and (4) after removing screws (5) and (6).

Disconnect connectors (7) and (8) of the horizontal and vertical cylinder coils.

CONTROLS

Check the correct operation with the DDS 2 diagnosis instrument connected to control unit diagnostic socket.

Electric diagram

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