© 2001 Cannondale Corporation - All Rights Reserved
58
X440s Owner's Manual.fm
ECM HARNESS CONNECTOR(S)
The ECM harness connector is a “locking type.” Tests
involving fault code diagnostics require the placing of test
leads to specific pin locations of the connector.
SENSORS
CRANKSHAFT POSITON SENSOR
NOTE : If the crankshaft position sensor fails, the
motorcycle will not run.
The crankshaft position sensor is located in the generator
housing. This sensor detects movement of a toothed wheel
that is molded into the flywheel and attached to the right
side of the crankshaft. The wheel has a 36-tooth pattern.
The teeth are evenly spaced with the exception of one triple
length tooth next to one triple length gap.
Everytime this tooth/gap passes the sensor the ECM
interprets it as bottom dead center (BDC). The ECM uses
this information to determine engine speed and crankshaft
position in relation to the point where fuel is injected and
ignition of the air/fuel mixture occurs.
THROTTLE POSITION SENSOR (TPS)
The TPS is a small, black plastic sensor attached to the
throttle plate shaft and located on the right side of the
throttle body. The TPS is a potentiometer that gives a
reading in the fully-closed position and all other throttle-plate
opening angles are calculated using the fully-closed position
as a base. Throttle-plate angle is used by the ECM to
determine fueling requirements for all throttle positions. The
signals that the TPS sends, informs the ECM of not only the
position of the throttle plate, but the speed with which it is
being opened or closed. The engine load is determined from
the TPS and engine speed (rpm).
The voltage output from the TPS increases proportionately
as the throttle is opened .
IDLE AIR CONTROL VALVE (MC1000)
The idle air control valve is mounted on the front of the
throttle body and permits air flow to bypass the throttle
plate. The valve is controlled by the ECU.
The flywheel cover has been removed for this photo to
show the sensor tip.
Components have been removed for this photo.
Components have been removed for this photo.