QDM 4 Error - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 01-13-2008, 02:05 PM   #1
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Default QDM 4 Error

My scanner gives a Quad Driver Module 4 error. Who knows what that means? Kris
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Old 01-14-2008, 05:09 PM   #2
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Not a clue... but here'* a free bump.
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Old 01-14-2008, 07:03 PM   #3
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What'* the number of the code?

Quad drivers are basically mini relays built into the PCM/ECM. Each driver controls up to four devices. Either one of the devices is drawing too much current or the PCM/ECM is bad. Give us the code.
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Old 01-16-2008, 01:50 AM   #4
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Default Qdm 4 error 670

The code for that error is 670. It is the 4th code in a group of 4. The other three being 561, 562, and 563. All of the latter 3 mention the Cruise control system as error location. The CC servo has been removed A because it needs rebuilding. I dont know if the 670 code is related to the cc or not. Thanks for asking Ted and for the bump J.
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