ABS ON....ABS OFF - Page 3 - 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 12-17-2005, 04:14 PM   #21
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Nah. The ABS system obviously braked the car by itself. I've heard they can do that.

(Sound of Will'* teeth gnashing)
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Old 12-17-2005, 04:27 PM   #22
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Quote:
Originally Posted by willwren
Glad you checked this topic. I was just going to link it from your new topic.

It'* NOT the ABS. The ABS has no power or ability to ENGAGE the brakes. It'* absolutely impossible. Please get this out of your head now, or it'll send you off in the wrong direction.

ABS doesn't engage brakes, it PREVENTS them from engaging. The force to stop is provided by you and the brake booster. The ABS takes that force away from any wheel that locks up when ABS is active.

You need to further dissect the failure. Did it pull to one side or the other? Describe in DETAIL exactly how it happened. Including weather conditions, road conditions, etc.
And my reply to his other topic:

Quote:
Think of it this way (weak analogy, but it serves the purpose):

Can bicycle brakes engage themselves? No, not unless there'* a major failure of a caliper that comes loose and binds against the rim. Think about that.

Now think of ABS as a small spot of oil on the rims, say a spot every 6" apart. That'* the ABS pulses that LET OFF the brakes to prevent them from locking up (in a simpler sense).

YOU apply the force. Without that force (luke), there can be no braking. The ABS system has no ability BY DESIGN to self-apply the brakes, let alone APPLY the brakes at all.

TC on the 92-95 Bonnevilles is a different story, as it uses applied braking, but I doubt your SE has this option. And there are many safeties and conditions that must be met for that system to operate. Any fault in the system immediately disables itself.
This problem will end up being a mechanical failure of a brake component unrelated to ABS.
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Old 12-17-2005, 06:04 PM   #23
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Thank you Bill Kenobi.
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Old 12-17-2005, 07:30 PM   #24
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The two (perhaps) most knowledgable people on this forum in the realm of TC and ABS are jr's3800 and myself. We dissect these systems regularly on our own cars and in the FSM. Since it'* a subsystem that cannot be diagnosed through the PCM, we pay special attention to it.

Don and I both discussed these two topics on the phone this morning. Closely inspect the brakes at all 4 corners. Pay particular attention to the brake lines feeding the front calipers, the condition of the pads, wear on the rotors, and also the rear drum mechanism.

You'll find your problem. But you won't find ABS as the culprit.
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