Join Date: May 2011
Location: Ventura, CA
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How To: Change CPS + My CPS Blurb
Given how common CPS failures are, I felt a video was necessary. But, its pretty easy, so the last 1/2 of the video is me talking about the CPS and its basic functions.
In the video I talk about the CPS detecting the teeth on a gear. This is the gear in question. Notice the square holes in the gear? This is actually what the CPS is detecting, no the teeth. You will also notice that 2 of the squares are different sizes. These identify cylinder 1 and 4 to the CPS
Originally Posted by Ford Manual
The PCM receives engine rotational position information from the Camshaft Position (CMP) sensor. The CMP is a hall-effect device. It outputs 12 volts to the PCM whenever it detects the iron of a spoked target wheel in front of it, and it outputs 0 volts whenever it detects the space between the spokes. The target wheel spokes and spaces are each 15 crank degrees, except for narrow spoke which indicates cylinder No. 1 and a wide spoke which indicates cylinder No. 4 (fires 5th). The NGS PID RPM is generated by the PCM from the CMP signal.
Thank you to mueckster for the manual citation, and SnackDoc for the picture.