103390, RE: FCD trouble Posted by VelocitaPaola, Dec-31-69 06:00 PM
I don't know about that... if the ground was loose, intermittent or high impedance you might see lower Vref levels. If it was somehow connected to a negative voltage source you would see higher Vref signals, but I don't know of any negative voltage sources in cars. Another option is a damaged output driver in the ECU, but that'd be rare.
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