what's a Quad Driver Module?

1995 OLDSMOBILE ACHIEVA
68,000 MILES
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CREATOR AND JUDGE
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I recently had the engines malfunction light to illuminate; i took it to an autoparts store and had it diagnosed. the code said DTC 27 and DTC 28. when i looked inside of the repair manual it was described as Quad Driver module 1& 2 but i dont know what it's pointing to.


Help me too understand the code: please!
Jul 4, 2012 at 3:02 AM
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CARADIODOC
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That's the high-current transistorized switching circuits that drive the ignition coils or injectors. Typically those are inside the Engine Computer but on some GM ignition coil packs they are built into that.
Jul 4, 2012 at 6:18 AM
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