I have a Volvo 940 1995 2.3 non turbo that came in with an intermittent stalling fault. I eventually pulled a coolant temp sensor DTC with autodiagnos & set about a scope capture. I noticed a regular pulsing on the waveform that made me wonder.
I wondered if this maybe a circuit integrity check that the PCM (Powertrain Control Module) performs.
Anyway I haven't seen it before, so I thought someone more experienced may know.
Cheers all
Dave
Message Thread 
Volvo 940 2.3 Non Turbo 1995 - Unusual Pulsing On The CTS Signal # - Dave Hill January 1, 2009, 5:01 pm
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