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International Automotive Technicians Network
Re: No spark
Posted to Technical Discussion Forum on 3/17/2020

Both signals should be about 5V square wave, as the scope shot from the archives shows, so not too sure about the ".4V" you speak of? Assuming you're using a DVOM? So, the synch signal would be low on the meter.

Could be failed ECM, but the failure rate of t... Login to read more.