Golf L4-1781cc 1.8L SOHC (RV) (1990)
Hall Effect Sensor: Description and Operation
Hall Sender Location
The hall sender or "Generator", which is located within the ignition distributor, creates a square wave signal which is used by the E.C.U. as a reference
for calculating ignition timing and engine speed.
Hall Generator
It consists of a semiconductor wafer element, and a permanent magnet. A rotating shutter called the trigger wheel acts as a switching device to produce
an "ON", "OFF", signal for ignition control.