Escort L4-98 1.6L SOHC VIN 5 FI (1985)
Hall Effect Sensor: Description and Operation
Profile Ignition Pickup
The PIP signal is created in the Hall Effect and Stator assembly and indicates crankshaft position and engine RPM Fig. 21. The PIP signal is fed to both
the TFI module and the ECA.
PIP Sensor
COMPONENTS
The Hall Effect device is made up of a voltage regulator, a Hall voltage generator, Darlington amplifier, Schmitt trigger, and an open collector output
stage integrated in a single monolithic silicon chip Fig. 22. A signal is produced when a ferrous material is passed through the opening and the flux lines
decrease.
The Hall generator (Hall device) sends a sine wave signal to the Darlington amplifier.
The Darlington amplifier inverts the signal. When the signal is low the output is high. When the signal is high the output is low. This output then goes to
the Schmitt trigger.
The Schmitt trigger shapes the signal into a square wave (digital high) signal.
