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ENGINE
ALFA 159 TRAINING MATERIAL
Fiat Auto S.p.A.
After Sales Training
1
1.
Engine speed sensor
ELECTRICAL SPECIFICATIONS:
SENSOR FEATURES
OUTPUT SIGNAL TYPE
MEASURING METHOD
Electrical resistance equal to approximately 1 kOhm.
Variable alternating voltage, maximum value and
frequency proportional to flywheel speed
Examiner with SAM (Examiner Smart) module is needed
to view the signal, considering its type. Set Examiner as a
voltmeter and acquire the signal for approximately 5
seconds.
The graph must show the following characteristics:
- wave amplitude and frequency proportional to each
other and to the flywheel speed
- signal changes when sensor picks up missing tooth.
Camshaft timing sensor
FUNCTION: For the engine ECU to acknowledge which cylinder is at
compression stroke.
FEATURES: The Hall effect timing sensor consists of a body which
integrates a coupling element and a 3-pin connector, a magnet and a
signal acquisition circuit. Two sensors are fitted (one on each camshaft).
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