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Old 05-23-2005, 09:37 AM   #1
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Default QDM, Occasional Ck Eng Light

Yeah..
I was clipping along just into the triple digits last Thursday and had to stop quick. Look down and the check engine light is on. All other gauges are fine. I gave it a quick test rev and the motor was still there. W/o turning it off I got it scanned. QDM module complaining. Once I turn it off and back on the light is gone. Ahjhhhhh easy fix.

This weekend Randman says, "hey, check engine light", I go over the story and he says it might be one of the items controlled by the quad mod causing the issue or a bad pcm. The light plagues us most of the day w/no consistent thing turning it on. Consistently turning off once start up occurs, just like it'* supposed to.

Only thing I know for certain so far is that previously my TC off light was always coming on after a moment of dry condition driving, would always work great in wet conditions. The TC light didn't come on at all when the check engine QDM code was lighting up my life.

Going to aim toward Randy'* ideas suggestions but always looking for more ideas. C'mon vets...lets have the list of ideas.
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Old 05-23-2005, 09:46 AM   #2
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Which QDM???? There are a few of them.
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Old 05-23-2005, 10:39 AM   #3
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That would be good to know.

And your TC is unrelated. It doesn't communicate with the PCM.

When you let us know which QDM it is, we can dig further. And all the answers are already posted here
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Old 05-23-2005, 12:37 PM   #4
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Will find the slip of paper tonight. Didn't happen all the way home. =0)
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Old 05-23-2005, 12:37 PM   #5
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Quote:
Originally Posted by LakevilleSSEi
Which QDM???? There are a few of them.


Quad Module?
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Old 05-23-2005, 02:10 PM   #6
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Hans...part of the pcm is pushing a check enging code.... it reads quad drvier module and the code for the one that'* bad.
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Old 05-23-2005, 06:05 PM   #7
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Ok vets, here'* the deal it'* your average 0640 Quad Driver Module, QDM 1 Fault

FSM says see A-144 (aka the reclining seat section)???

Quote:
Originally Posted by fuddyduddy121
1640 is the Quad Driver Module. This means that you have an improper voltage on either the charcoal canister solenoid or the TCC apply solenoid. Sometimes this can be caused by a bad connection, other times by a bad part.

http://www.bonnevilleclub.com/forum/...ic.php?t=10136
So guys...TCC is internal right? Although we should have a connector on the outside for me to check and I'm all over the charcoal canister. Any other suggestions?
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Old 05-23-2005, 06:09 PM   #8
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What the heck does the PCM have to do with the seats? Electrical is 8A-xxx. Are you sure they're pointing you to the electrical section or maybe a mechanical section within the area you;re currently in?

OK, I'll edit my post too:

Are those the only two items controled by that QDM as shown by your FSM? Fuddy had a 93 so it might be a bit different than yours.
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Old 05-23-2005, 07:38 PM   #9
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My FSM seems to be about as good as urs buddy
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Old 05-23-2005, 07:45 PM   #10
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TCC Solenoid is an internal part....with an internal plug I believe.....the classic 6 dollar part but 10 hr job as you have to remove the d/* pan on the side of the trans to access it. If I remember correctly.

My advice is just drive it for a while.....My car threw out every QDM code there is, and I never did anything about them. They just worked themselves out and haven't seen one come up in about 5-6 mos.
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