jpdanny

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Question Asked: Missing return control from ECU to emmission canaster vent valve.
July 07, 2011, 01:28 PM
Looks like a solid state driver because with the vent valve electrical connection disconnected I originally could read a +3.5 bias voltage which looks like a base to collector voltage without an emmiter groung return indicating a faulty transistor. Is the control driver internal or external to the ECU?
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