Profile Ignition Pick-Up (PIP)

WARNING: This page is about a different car, the 1994 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.

On 2.3L EI ignition systems, modulated PIP and CID signals are produced by dual Hall Effect crankshaft sensor and monitored by ignition module. See CRANKSHAFT POSITION (CKP) SENSOR under INPUT DEVICES. Ignition module relays the PIP signal to PCM, which uses it as an RPM reference to determine timing adjustments.

PCM timing control returns to ignition module in form of a Spark Output (SPOUT) signal. The leading edge of SPOUT signal fires coil, and trailing edge controls dwell on-time.

On Distributor Ignition (DI) systems, PIP signal is provided by a 12-volt reference from ignition module to Hall Effect switch inside distributor. This reference voltage is modulated by window/shutter Hall Effect switch. Monitored reference is pulled low when shutter blade is out of Hall Effect switch window.

When shutter blade enters window, 12-volt reference returns, and ignition module sends PIP signal to PCM. PCM uses the PIP signal as an RPM reference to calculate timing adjustments. PCM timing control returns to ignition module in form of a Spark Output (SPOUT) signal.