Quad Driver 1 failure - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 03-18-2003, 05:08 PM   #1
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Default Quad Driver 1 failure

My scantool tells me quad driver 1 is bad ONLY if the brake pedal is depressed. WTF? What the hell does the brake switch have to do with the QDM?
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Old 03-18-2003, 09:00 PM   #2
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Are you sure it is telling you that it is "bad"?

The Quad Driver "A" Fault sets if the brake is not applied (It is connected to the brake) and there is improper voltage detection at the

1. Canister Purge Solenoid
2. Temperature Lamp
3. Low Speed Fan Relay
4. TCC Apply

The Quad Driver circuit switch for the brake detection sets when you press the brake, but it shouldn't set a Code 26.
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Old 03-18-2003, 09:07 PM   #3
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Not setting a code. Just reading bad on the data stream every time I hit the brake.
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Old 03-18-2003, 09:10 PM   #4
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Try your tool on another Bonneville. Possibly the "bad" indicator in your software is incorrect.
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Old 03-19-2003, 09:20 AM   #5
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Default bad quad driver

You must have an Actron scan tool. I know this because I have one also and on all GM cars that ore ODB1 I see this. I see it on my 93 Bonne, my 94 Grand Am 3.1, my Buick Century 3.8. This is a software problem in the Actron Scan tool, they are reading the wrong bits in the stream. I have contacted them and they are aware of the probelm but since they arent making the product anymore have no intention of fixing it.
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Old 03-20-2003, 01:16 AM   #6
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Cool. Software. Must be Microsoft.
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Old 01-04-2009, 04:14 PM   #7
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I'm getting a code 26 and a service engine soon light. The light goes off when I press on the brake for a few seconds and then comes back on after I release for a few seconds. Any ideas?
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Old 01-04-2009, 04:52 PM   #8
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This thread is very old. Your best bet is to start a new thread about this. Also post in the correct area and post information such as year of car and trim level. Thanks.
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Old 01-04-2009, 11:27 PM   #9
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Hi Dan,

I'm new here. Can you tell me how to post a new thread? Thanks, Mike.
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Old 01-05-2009, 09:17 AM   #10
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From the main page of the forum section you would like to post into, press the new thread button. It can seem hidden when reading and looking at other things. Holler if we can help further.
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