How to test your OSS (Output Shaft Sensor) - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 4 Old 02-15-2017, 06:54 PM Thread Starter
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How to test your OSS (Output Shaft Sensor)

99-04 Mustangs have a reluctor-style OSS (Output Shaft Sensor) that tells the PCM the vehicle speed. Here is how to test your OSS:

Remove the OSS from your transmission. Connect the two pins of the OSS to an AC voltmeter. Find a piece of iron or steel (not stainless). Rapidly shake the OSS over the metal as fast and as close as you can and you should see about 1/3 to 1/2 of a volt on the AC voltmeter:




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post #2 of 4 Old 02-15-2017, 08:38 PM
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frequency and amplitude need to be verified

need a scope and rotating shaft........


89 GT gr-40, KB2200(10psi), tweecer R/T,LC-1, 22gal cell, w/tailpipes.
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post #3 of 4 Old 02-15-2017, 09:34 PM Thread Starter
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I stand corrected.

You guys all need a scope and a rotating shaft with teeth or holes to properly test an OSS. And you need the amplitude specs for the sensors too.

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post #4 of 4 Old 02-15-2017, 09:40 PM
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Naw, ya don't

important sensor info is really just useless......

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