Aprilia Consumer Service Spa
Technical Service and Training
Release 4 july 99
This material is didactic and
may be changed following the technical
development of the product
CAMSHAFT SENSOR:
The cam sensor is an inductive sensor installed in the front cylinder head and is identical to the
pick-up. This sensor is of fundamental importance and allows the ECU to recognise the exact
sequence of each single cylinder, resetting the internal count to zero during the asynchronous
ignition phase. The ohmic resistance of the sensor, measured at a temperature of 20 degrees, is
about 240 Ohms. This resistance can be measured either directly on the sensor wiring or at the
ECU connectors, connecting a tester between the terminals, as shown.
SW –ECU DIAGNOSIS
EXISTENT
OHMIC DIAGNOSIS
AVERAGE VALUE 240 Ohms
MEASURED BETWEEN
WIRES
2-10
(PURPLE/BLACK and
GREY/BLACK)
RIGHT-HAND CONNECTOR