How to test a crank sensor with a voltmeter

The tests shown in this video apply to camshaft, crankshaft and vehicle speed sensors on ALL Chrysler models, in all production years. The vehicle being tested is a 1997 Jeep with a 4.0L engine.
Chrysler has changed very little in regards to their hall effect sensors throughout the years. Older systems used an 8-9v reference circuit (power supply), where the newer systems use 5v. And with all of them, the signal circuit is a 5v pull-down design.

Engine Performance Diagnostics chapter 21 pages 20-29

Tests shown
- how to check a crank sensor with a voltmeter
-what does an on/off digital signal look like on a voltmeter
- how to check the 5v reference and ground to the sensor
- how to perform a bypass test
- how to verify signal circuit integrity

Tools used
- digital multimeter
- jumper wire
- backprobing pins
- incandescent test light
- scan tool

Related videos
- 1997 Dodge Neon no start, crank sensor problems
https://youtu.be/xwh3XM1Nl4k
- How to test a crank sensor (Chrysler Dodge Jeep)
https://youtu.be/YtpDi2vnGog
- How to test a cam sensor with a voltmeter (All Chrysler models)
https://youtu.be/irHVjFTq4LE
- 2003 Chrysler-Dodge 3 8L No Start (faulty crank sensor)
https://youtu.be/VrsI1xCoZ8M
Playlist
(Chapter 21) Ignition inputs, cam and crank
https://www.youtube.com/playlist?list=PLAFYVCyenqcqEN41aYznWn9Nfhy1PiMjo

For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book.
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