Cartwaveforms > ignition > edis pip and saw signals > Ford EDIS PIP & SAW
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Ford EDIS PIP & SAW Waveform Notes
PIP and SAW are two Ford terms and are abbreviations for:-
- Profile Ignition Pick-up and
- Spark Advance Word
Profile Ignition Pick-up is the term used for the signal sent from the Electronic Distributorless Ignition System (EDIS) to the Electronic Control Module (ECM). This signal is the digitally modified signal that originated from the Crank Angle Sensor (CAS) in an Alternating Current (AC) format. The PIP signal into the ECM is a squarewave switched at 12 volts and is the ECM’s reference for the engines speed and position. The PIP signal when received by the ECM can then be modified to take into account the ignitions timing advance. This returning signal to the EDIS unit is called the SAW signal as is in the form of a 5 volt squarewave.
Both signals can be seen in the example waveform with the PIP signal in blue and the SAW signal in red.
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