My ABS saga
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Burning Brakes
Joined: Nov 2009
Posts: 828
Likes: 103
From: Olney MD
I have same codes, plus 1571C
Hello, Skrimshaw! Thanks for sharing your -frustrating- experience with your ABS and EBCM. I have roughly the same problem (ABS Lights and TCS Lights and DIC warnings) but in my case, the ABS really doesn't work. In addition to No Comms with TCS, I have U1040 and C1571. I've checked and cleaned grounds and cleaned wheel sensors among other things to resolve this issue. I was thinking about buying a new EBCM (current one was fixed for the 1214 code by ABS Fixer a year ago) but I wasn't sure that would solve the problem. I appreciate the fact that you swapped in a good one from your other Vette to see if that worked. That indicated to me that I would likely not have any better results by replacing my EBCM.
I'm not sure how hard it is to replace the EBCM part of the wiring harness, but that thought has gone through my mind. If I understand correctly, you're seeing problems in that area.
I like to think that a Tech II in the hands of a clever technician would pinpoint the problem, but if the solution turns out to be an unobtainable replacement part, that's not a very satisfying result.
Good luck in finding a breakthrough!
I'm not sure how hard it is to replace the EBCM part of the wiring harness, but that thought has gone through my mind. If I understand correctly, you're seeing problems in that area.
I like to think that a Tech II in the hands of a clever technician would pinpoint the problem, but if the solution turns out to be an unobtainable replacement part, that's not a very satisfying result.
Good luck in finding a breakthrough!
Last edited by helphos; Jul 17, 2020 at 03:08 PM. Reason: clarification
Thread Starter
Racer
Joined: Jun 2020
Posts: 357
Likes: 6
im going to continue to plug away and figure it out. The car is outstanding on the track, im just grateful to be working on a platform that can stand up to track duty. With that being said, i have to figure this out!
Melting Slicks
Joined: Mar 2018
Posts: 2,502
Likes: 187
From: California
I guess some don’t under stand open shorts or bad harnesses. Possible sensors , and or a module . Either way I would start with whatever is free 1st and move on to the next least expensive option if I’ve already concludes it is not a pcm or bcm .
I had a fuel theft deterrent code that numerous people for years never found the answer to . At the end of the day it’s because they lack code understanding . Understanding your code is key because they literally almost pin point the problem . Fuel theft deterrent =? A fuel door popper obviously. People were trying to lead me down a road here of lock cylinder bypass systems . Relearn sequences.ingition switches ect...everything but . So be careful on some advice on these threads .
I had a fuel theft deterrent code that numerous people for years never found the answer to . At the end of the day it’s because they lack code understanding . Understanding your code is key because they literally almost pin point the problem . Fuel theft deterrent =? A fuel door popper obviously. People were trying to lead me down a road here of lock cylinder bypass systems . Relearn sequences.ingition switches ect...everything but . So be careful on some advice on these threads .
Last edited by Speedy007; Jul 18, 2020 at 03:38 PM.
Thread Starter
Racer
Joined: Jun 2020
Posts: 357
Likes: 6
Finally have an update!
I re checked the grounds and 12v and they were 100% in working order. This only left the serial wire in question. I cut back a piece of the coating on each end of the serial wire so i could "jump" a new wire from the ebcm connector all the way to the comb. Connected the wire, and started the car and sure enough, abs light is gone!
Of course, with the abs now functioning, it brought up a new list of issues:
c1281
c1282
c1284
c1287
c1288
These are all codes that came back after clearing it originally then driving it around for 15 minutes.
I re checked the grounds and 12v and they were 100% in working order. This only left the serial wire in question. I cut back a piece of the coating on each end of the serial wire so i could "jump" a new wire from the ebcm connector all the way to the comb. Connected the wire, and started the car and sure enough, abs light is gone!
Of course, with the abs now functioning, it brought up a new list of issues:
c1281
c1282
c1284
c1287
c1288
These are all codes that came back after clearing it originally then driving it around for 15 minutes.
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,500
Likes: 3,999
From: Cape Coral, Florida
Finally have an update!
I re checked the grounds and 12v and they were 100% in working order. This only left the serial wire in question. I cut back a piece of the coating on each end of the serial wire so i could "jump" a new wire from the ebcm connector all the way to the comb. Connected the wire, and started the car and sure enough, abs light is gone!
Of course, with the abs now functioning, it brought up a new list of issues:
c1281
c1282
c1284
c1287
c1288
These are all codes that came back after clearing it originally then driving it around for 15 minutes.
I re checked the grounds and 12v and they were 100% in working order. This only left the serial wire in question. I cut back a piece of the coating on each end of the serial wire so i could "jump" a new wire from the ebcm connector all the way to the comb. Connected the wire, and started the car and sure enough, abs light is gone!
Of course, with the abs now functioning, it brought up a new list of issues:
c1281
c1282
c1284
c1287
c1288
These are all codes that came back after clearing it originally then driving it around for 15 minutes.
Thread Starter
Racer
Joined: Jun 2020
Posts: 357
Likes: 6
I thought so too, i checked the resistance and voltage and got the same numbers except my resistance was like 180 instead of 150. I even double checked those readings on my other z06 and they were the same. Very odd, but sure enough its working now!
Burning Brakes
Joined: Nov 2009
Posts: 828
Likes: 103
From: Olney MD
The blue wire, eh?
Finally have an update!
I re checked the grounds and 12v and they were 100% in working order. This only left the serial wire in question. I cut back a piece of the coating on each end of the serial wire so i could "jump" a new wire from the ebcm connector all the way to the comb. Connected the wire, and started the car and sure enough, abs light is gone!
Of course, with the abs now functioning, it brought up a new list of issues:
c1281
c1282
c1284
c1287
c1288
These are all codes that came back after clearing it originally then driving it around for 15 minutes.
I re checked the grounds and 12v and they were 100% in working order. This only left the serial wire in question. I cut back a piece of the coating on each end of the serial wire so i could "jump" a new wire from the ebcm connector all the way to the comb. Connected the wire, and started the car and sure enough, abs light is gone!
Of course, with the abs now functioning, it brought up a new list of issues:
c1281
c1282
c1284
c1287
c1288
These are all codes that came back after clearing it originally then driving it around for 15 minutes.
Thanks for your persistence.