A/C Gremlin

[DVT873]

Clutch coil resistance should be 2.8 ohms per a NAv document IK1900018 on APADs troublshooting If less than that APADS reads it as a short. How long does the clutch stay engaed before it kicks out and starts flashing red? Measure the resistance (ohms) cold, then measure it after APADs kicks out. This has a serpintine belt correct?

If the belt is slipping you normally don't hear it. The slippage builds heat on the pulley/coil. This changes the resistence. See this quite a bit on the newer stuff where something electronic is watching how much amperage is going to the AC clutch. Lot of parts get thrown at problem. Often all that is needed is a new belt and tensioner.

If there are any connections in the wire between the clutch and the APADs lmake sure they are tight and clean. Or cut out the connector and splice the wire together.

That little bit of info doesn't seem to show up in the usual troubleshooting info. I learned that in a belt seminar a long time ago. This same slippage will damage front bearings in alternators and cause other heat related damage to them.

Search IK1900018 or try here https://static.nhtsa.gov/odi/tsbs/2015/M...0-9999.pdf Basically same info as APADs doc.