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Discussion Starter · #1 ·
So I am still trying to figure out why my Ac is shutting off.
When car is on and I turn Ac on it comes on blowing cold, then 3 seconds later it shuts off and light on Ac button blinks in 1 second intervals.

I have confirmed pressures are correct, both radiator fans come on, clutch is engaging.

I have followed Toyota service manual diagnostics and all specs check out. Checked speed sensor continuity, checked wiring harness, installed used Ac amplifier I purchased for twenty dollars just to be sure before I bought new compressor.

The question I have is about speed sensor on compressor.

I checked ohms and it was within range of 165-205. Could it still be defective even if continuity is good?

I don't have an oscilloscope to check waveform.
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