Lucas AB17
ECU Ignitiont
Sensor
Information
Crankshaft Angle Sensor (CAS)
(Note CAS fitted to later the Rover MEMS system is generally similar)
Description: Inductive pick up, connecting plug often blue in colour.
Connection to ECU: Connects to ignition ECU via pins 4 and 6.
Output Voltage: Sine wave, about 5 volts peak to peak (roughly 3.25 Volts RMS) with engine running at 2000 RPM. Output voltage at cranking speed generally much lower
This probe is easily damaged mechanically,
the probe tip projects into the bellhousing is mounted very close to the
moving parts, hence is very vulnerable to a build up of debris.
The connecting plug is also very exposed
to vibration, oil leaks and road dirt.