Continuity between the two terminals. You'll find either an open circuit, (very rare), or around 400 to 800 ohms. Check for resistance from either terminal to the housing. Only an open circuit is acceptable. That will test the integrity of the coil of wire.
To test its ability to magnetically produce a signal, measure the AC voltage while the transmission is moving in gear. Basically you're looking for something vs. Nothing. The voltage will not be accurate and will bounce around. Digital voltmeters are designed to read a 60 hz sine wave on the AC scale. The sensor's signal frequency will not be 60 hz and it's closer to a square wave. The meter's reading will vary depending on what part of the waveform it takes the sample to measure.
The best way to test these sensors is to view live data on a scanner. If it shows the Engine Computer is happy with the signals and there's no related diagnostic fault codes, what more could you want?
January, 4, 2013 AT 12:33 AM
Sorry it took so long to get back, been away for a short time, tested the sensor and everything checked out ok, finally got car to put off some codes, getting a po765 shift solenoid D, now trying to figure out if it is the trans control solenoid on the outside of tranny, or solenoids on the inside. Appreciate the help, thank you.
January, 4, 2013 AT 12:46 AM
The best I can recommend for that is to visit the Chrysler dealer to get a copy of the diagnostic manual for transmissions. That will have the troubleshooting steps for every fault code along with drawings of all the related connectors and terminals. Many of the tests will require the use of their DRB3 scanner, but if you understand basic electrical theory and know how the system works, you can often stumble through the tests and figure out which next step to go to without using the scanner.
At the very nice family-owned dealership I used to work at, the service advisers would search for the right manual and section, and photocopy it for you, with the owner's blessings, as long as you were willing to wait a day or two in case they were busy with customers. Often those guys would stay late to do that for customers who would stop in the next day. We traded service information between the local Pontiac and Ford dealers too.
January, 4, 2013 AT 12:28 PM
Great, thankyou Caradiodoc, I will make a trip to the dealership today and try to get a diagnostics sheet, thanks again for the advice!