95 Bonnie QDM issues

[buff6116]

Ok i have a 95 bonnie that is sending a QDM code. What dose the QDM do and if i need a new one can i just get from a junk yard.

Thanks

[maxwedge]

Qdms are devices in the pcm that control various solenoids for engine and trans controls, normally a qdm code inidicates a short or open circuit in that particular qdm circuit or solenoid. Replacing the pcm is not the answer

[Jrs3800]

You need to know whats on that Quad Driver Module so that you can test those items as the PCM has seen a problem with one of the items on that circuit...