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International Automotive Technicians Network
Re: TOYOTA speed sensor
Posted to Technical Theory Forum on 3/9/1999

Hi Vaden,

I have had a couple of these and turned out to be dead VSS (Vehicle Speed Sensors). Best way to confirm it is to get a scope on the input to the PCM (Powertrain Control Module - or Computer) and look at the signal. It sould be a clean square wave. ... Login to read more.