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

test shown enh 50

  • 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

  • scan tool
  • incandescent test light
  • jumper wire
  • back-probing tools
  • digital multimeter

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(Chapter 21) Ignition inputs, cam and crank

Related videos:

1997 Dodge Neon no start, crank sensor problems:


How to test a crank sensor (Chrysler Dodge Jeep):


How to test a cam sensor with a voltmeter (All Chrysler models):


2003 Chrysler-Dodge 3 8L No Start (faulty crank sensor):


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

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