What signals are shown in this Ford DIS timing diagram?

It shows the PIP, CID, and SPOUT signals, coil current for pins 11, 9, and 8 (with fire points for coils 2, 3, and 1), and the IDM signal on pin 12, all plotted against 360 crank degrees between TDC marks.

At what crank angle does the PIP signal occur?

The diagram marks the PIP signal at 10° BTDC, with an additional 36° dimension and 60°/60° spacing between events.

Which pins carry the coil current signals?

Coil current is shown on pin 11 (Fire Coil 2), pin 9 (Fire Coil 3), and pin 8 (Fire Coil 1); the IDM signal is on pin 12.

How are the PIP and CID signals generated?

Per the lower illustration, the PIP signal is produced by a vane cup rotating at crank speed (with 120° and 60° vane spacing), while the CID signal comes from a element rotating at 1/2 crank speed. The view shows the vane cup as installed on the engine.

In what order do the coils fire in this diagram?

Following the SPOUT edges left to right, the sequence shown is Fire Coil 2, Fire Coil 3, then Fire Coil 1, repeating.

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Ford DIS Ignition Timing Diagram - PIP, CID, SPOUT & Coil Current Waveforms

Ignition timing diagram showing PIP, CID, SPOUT and coil current waveforms versus crank degrees

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Timing diagram showing PIP, CID, SPOUT and coil firing waveforms relative to TDC and crank position.

AI caption July 2007 · Photo 735 of 1028

This document is a timing diagram for a Ford Distributorless Ignition System (DIS), uploaded as one page of a multi-page DIS reference set. The upper portion shows waveform traces plotted against crankshaft rotation (marked in TDC references spanning 360 crank degrees) for the PIP (Profile Ignition Pickup) signal, the CID (Cylinder Identification) signal, the SPOUT (Spark Output) signal, and the coil current signals on pins 11, 9, and 8, plus the IDM (Ignition Diagnostic Monitor) signal on pin 12. Annotations show the PIP signal occurring at 10° BTDC with a 36° reference and 60°/60° spacing between events. Dashed lines correlate each SPOUT edge with the firing points labeled "FIRE COIL 2," "FIRE COIL 3," and "FIRE COIL 1," showing the coil firing sequence relative to crank position. The lower portion illustrates the vane cup as installed on the engine: one rotor turning at crank speed generates the PIP signal (with 120° and 60° vane spacing noted), while a second rotor turning at 1/2 crank speed generates the CID signal. A reader can learn the timing relationships among PIP, CID, SPOUT, coil current, and IDM signals in the DIS system and how the vane cup produces the PIP and CID signals.

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Frequently asked questions

What signals are shown in this Ford DIS timing diagram?: It shows the PIP, CID, and SPOUT signals, coil current for pins 11, 9, and 8 (with fire points for coils 2, 3, and 1), and the IDM signal on pin 12, all plotted against 360 crank degrees between TDC marks.
At what crank angle does the PIP signal occur?: The diagram marks the PIP signal at 10° BTDC, with an additional 36° dimension and 60°/60° spacing between events.
Which pins carry the coil current signals?: Coil current is shown on pin 11 (Fire Coil 2), pin 9 (Fire Coil 3), and pin 8 (Fire Coil 1); the IDM signal is on pin 12.
How are the PIP and CID signals generated?: Per the lower illustration, the PIP signal is produced by a vane cup rotating at crank speed (with 120° and 60° vane spacing), while the CID signal comes from a element rotating at 1/2 crank speed. The view shows the vane cup as installed on the engine.
In what order do the coils fire in this diagram?: Following the SPOUT edges left to right, the sequence shown is Fire Coil 2, Fire Coil 3, then Fire Coil 1, repeating.