Search Function - C4 - ABS
Thread Starter
Instructor
Joined: Aug 2010
Posts: 119
Likes: 47
From: TX
Search Function - C4 - ABS
Much like a couple of other Forums I'm on (Harley & Toyota) I find the search function leaving a lot to be desired.
I have a 1996 (C4) and am having brake issues that I am continuing to assess and address. I've done most everything except achieve a proper bleed and get a firm pedal. Everyone who has responded here and on other forums, seem to point to trapped air or malfunctioning ABS to allow the air to be bled. Over the weekend and early next week I will try to activate the ABS on a gravel road (I don't have a programmer that will operate the ABS) and bleed again to see if I get any improvement. If I don't get results my next step is to eliminate the ABS.
I know there are members who have done this and I'd like feedback, as to what fitting, kits, or method used for the tubing (hardware), then I need to know how to disable the controller, in a manner that it will not throw alarms or codes.
Thanks for any feedback in advance. Pictures of yours (elimination) or links to any plug and play kit would be greatly appreciated. If I can find the fittings it looks as simple as a tee for the Front MC tubing (smaller) and LF & RF, as well as a tee for the Rear MC tubing (Larger) and LR & RR. I'm also assuming the proprtioning vale is upstream of the ABS system.
I have a 1996 (C4) and am having brake issues that I am continuing to assess and address. I've done most everything except achieve a proper bleed and get a firm pedal. Everyone who has responded here and on other forums, seem to point to trapped air or malfunctioning ABS to allow the air to be bled. Over the weekend and early next week I will try to activate the ABS on a gravel road (I don't have a programmer that will operate the ABS) and bleed again to see if I get any improvement. If I don't get results my next step is to eliminate the ABS.
I know there are members who have done this and I'd like feedback, as to what fitting, kits, or method used for the tubing (hardware), then I need to know how to disable the controller, in a manner that it will not throw alarms or codes.
Thanks for any feedback in advance. Pictures of yours (elimination) or links to any plug and play kit would be greatly appreciated. If I can find the fittings it looks as simple as a tee for the Front MC tubing (smaller) and LF & RF, as well as a tee for the Rear MC tubing (Larger) and LR & RR. I'm also assuming the proprtioning vale is upstream of the ABS system.
Safety Car
Joined: Jun 2010
Posts: 4,564
Likes: 1,676
Safety Car
Joined: Mar 2017
Posts: 4,202
Likes: 1,323
From: LeClaire Iowa
I think ABS is a very nice thing to have. If mine acted up on my 96 I would have my unit professionally cleaned out, o-rings changed, rebuilt and tested. I certainly would not delete it. Dan
Lies-within (mtechniqueauto.com)
Lies-within (mtechniqueauto.com)
Le Mans Master
Joined: Feb 2000
Posts: 9,061
Likes: 214
From: Epping NH
When I was having a problem on my 96 sometime ago, it turned out to be the ETCBM module that had failed, as per the troubleshooting in the FSM. I found a used one on eBay about 10 years ago, and my brakes, ABS and TC have worked fine since.
I wanted to troubleshoot the module, having a degree in electronics, but when I opened it up, it had some type of conformal coating on the board to protect it against moisture, which would have made troubleshooting a complete PITA.
I think my biggest concern as our C4s get older is that finding the various electronic modules is going to get harder and harder to do.
I wanted to troubleshoot the module, having a degree in electronics, but when I opened it up, it had some type of conformal coating on the board to protect it against moisture, which would have made troubleshooting a complete PITA.
I think my biggest concern as our C4s get older is that finding the various electronic modules is going to get harder and harder to do.
Safety Car
Joined: Mar 2017
Posts: 4,202
Likes: 1,323
From: LeClaire Iowa
When I was having a problem on my 96 sometime ago, it turned out to be the ETCBM module that had failed, as per the troubleshooting in the FSM. I found a used one on eBay about 10 years ago, and my brakes, ABS and TC have worked fine since.
I wanted to troubleshoot the module, having a degree in electronics, but when I opened it up, it had some type of conformal coating on the board to protect it against moisture, which would have made troubleshooting a complete PITA.
I think my biggest concern as our C4s get older is that finding the various electronic modules is going to get harder and harder to do.
I wanted to troubleshoot the module, having a degree in electronics, but when I opened it up, it had some type of conformal coating on the board to protect it against moisture, which would have made troubleshooting a complete PITA.
I think my biggest concern as our C4s get older is that finding the various electronic modules is going to get harder and harder to do.
Safety Car
Joined: Jun 2010
Posts: 4,564
Likes: 1,676
Round numbers, 360,000 C4's made between 84-96.
91,000 of those are 84-85 with No ABS and very little electronic components
115,000 86-89 cars with ABS and very little other electronic components
151,000 90-96 cars with ABS and more electronic components
As you can see just grouping it into these three categories brings in an smaller quantity of parts. Some crossover from the early generation some do not. It is tough for a vendor to make 1 part that covers 84-96 much less one that covers a smaller break down.
Out of those 360,000 C4's just in my small portion of the world at a local small junkyard, they currently have at least 100 C4's in stock. They crush several a month to dispose of to make room for the new C4's. Of those they crush, not all parts are taken out and sold. I wish I had space for certain items to hold onto or even the money to do it.
Thread Starter
Instructor
Joined: Aug 2010
Posts: 119
Likes: 47
From: TX
I've been checking locally, as I also have a 2000 4Runner lacking 1 or 2 parts. I've seen 20 4Runners come through 2 of which were the proper sub-model and 1 with the correct interior, while I've only seen 1 C4 and it was an early model. Didn't even have the same fender screws, much less ABS etc. If I saw that many C4s in one yard I'd probably pass out. Then again buying an ABS module off one might be no better than what I already have.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Thread Starter
Instructor
Joined: Aug 2010
Posts: 119
Likes: 47
From: TX
Just looking at the picture, mine is configured differently. Mine has the 10mm x 1 fitting for the rear from the MC and two smaller (haven't sized yet) i think 8mm going to the LR anf RR, and the front MC line and LF & RF all inline. So 2 rows of 3 fittings each.
Thread Starter
Instructor
Joined: Aug 2010
Posts: 119
Likes: 47
From: TX
Just got the car back from the shop and the brakes are not perfect but they are better. I suspect there may be come trash or the slightest bit of air remaining, but it's drivable brakewise.
Thanks.Now onto the next few issues.
Started another thread, however I'll throw this out. Can someone take a picture of their wiper blades or better have a part #. I bought blades and they are too tall to go under the hood.
Thanks.Now onto the next few issues.
Started another thread, however I'll throw this out. Can someone take a picture of their wiper blades or better have a part #. I bought blades and they are too tall to go under the hood.
Last edited by TSheff; May 6, 2024 at 04:10 PM.