'01+ EBCM in 97-00 C5
Thread Starter
Instructor
Joined: Jun 2014
Posts: 236
Likes: 53
From: New Zealand
The only function related to the ABS/AH/TC in the PCM is the torque control AKA cut back engine power to stop the wheels from spinning. So, all you can change is how much power is cut. The interface from the EBCM to the PCM is a PWM signal that basically tells the PCM how much the torque needs to be reduced.
The PCM has no control over what the EBCM is doing. You still get the AH/ABS/TC operation of the EBCM even when you completely disable the torque control in the PCM. You also still get all AH/ABS/TC messages with the torque control in the PCM disabled.
With the cluster still showing issues with the EBCM even with it completely dead, I'd have to think either the cluster or the BCM is polling the EBCM and throwing those warning when it doesn't get a response.
The PCM has no control over what the EBCM is doing. You still get the AH/ABS/TC operation of the EBCM even when you completely disable the torque control in the PCM. You also still get all AH/ABS/TC messages with the torque control in the PCM disabled.
With the cluster still showing issues with the EBCM even with it completely dead, I'd have to think either the cluster or the BCM is polling the EBCM and throwing those warning when it doesn't get a response.
Race Director
Joined: Apr 2007
Posts: 11,150
Likes: 890
From: South Western Ontario
No, the PCM can not be programmed to disable the ABS function.
No, the PCM can not be programmed to disable the ABS function.
No, the PCM can not be programmed to disable the ABS function.
No, the PCM can not be programmed to disable the ABS function.
No, the PCM can not be programmed to disable the ABS function.
I'm quite confused how my second paragraph wasn't clear......
No, the PCM can not be programmed to disable the ABS function.
No, the PCM can not be programmed to disable the ABS function.
No, the PCM can not be programmed to disable the ABS function.
No, the PCM can not be programmed to disable the ABS function.
I'm quite confused how my second paragraph wasn't clear......
Melting Slicks
Joined: Jul 2004
Posts: 3,092
Likes: 120
From: orlando florida
St. Jude Donor '15
not with hptuners, or efilive. here is a screenshot showing what hptuners can do. only things related to engine and transmission. the pcm does very little communicating with the ebtcm and has no control over it. tuning software companies are not going to make something that can removed a safety related feature of a car. way too much liability.
Last edited by mrr23; Aug 11, 2015 at 09:15 PM.
Melting Slicks
Joined: Jul 2004
Posts: 3,092
Likes: 120
From: orlando florida
St. Jude Donor '15
my abs module is out. when it no longer communicates, i get a service vehicle soon message in the DIC. it does not turn the SES light on.you will get these codes per module
10-PCM P1571 TRACTION CONTROL SYSTEM DESIRED TORQUE CIRCUIT
28-TCS NO COMM.
58-SDM U1040 Loss of Communication
now with hptuners, you can turn off the reporting of the code to the PCM. this still won't turn off the abs and tc lights or the DIC reporting across the ticker.
10-PCM P1571 TRACTION CONTROL SYSTEM DESIRED TORQUE CIRCUIT
28-TCS NO COMM.
58-SDM U1040 Loss of Communication
now with hptuners, you can turn off the reporting of the code to the PCM. this still won't turn off the abs and tc lights or the DIC reporting across the ticker.
Thread Starter
Instructor
Joined: Jun 2014
Posts: 236
Likes: 53
From: New Zealand
my abs module is out. when it no longer communicates, i get a service vehicle soon message in the DIC. it does not turn the SES light on.you will get these codes per module
10-PCM P1571 TRACTION CONTROL SYSTEM DESIRED TORQUE CIRCUIT
28-TCS NO COMM.
58-SDM U1040 Loss of Communication
now with hptuners, you can turn off the reporting of the code to the PCM. this still won't turn off the abs and tc lights or the DIC reporting across the ticker.
10-PCM P1571 TRACTION CONTROL SYSTEM DESIRED TORQUE CIRCUIT
28-TCS NO COMM.
58-SDM U1040 Loss of Communication
now with hptuners, you can turn off the reporting of the code to the PCM. this still won't turn off the abs and tc lights or the DIC reporting across the ticker.
Well thats a start, so does that mean the abs fault codes wont store in the fault codes list?
What about a custom dash - with new guages so there is no display?
Race Director
Joined: Apr 2007
Posts: 11,150
Likes: 890
From: South Western Ontario
There are no codes for the module when it's dead because you can't communicate with it to get any codes from it. When you read the codes for each module the code reader is asking that module to respond with the codes. The PCM stores drivetrain codes, the EBCM stores ABS type codes, the RDCM stores right door issue codes, the HVAC module stores the heating and AC codes, etc, etc. No module = no comms or no response when looking for codes.
All the triggers for the ABS/AH/TC lights and messages are relayed over the serial bus between the cluster and the EBCM. If the EBCM does not respond to the cluster then the cluster turns-on the ABS and TC lights and displays the service warning by default since it's programmed to do that as a warning that the ABS system is on the fritz. All that you see in front of you on the cluster is due to the cluster programming. If you get rid of the stock cluster so there is no display and there is no ABS light and there is no TC light then you won't see them anymore.
All the triggers for the ABS/AH/TC lights and messages are relayed over the serial bus between the cluster and the EBCM. If the EBCM does not respond to the cluster then the cluster turns-on the ABS and TC lights and displays the service warning by default since it's programmed to do that as a warning that the ABS system is on the fritz. All that you see in front of you on the cluster is due to the cluster programming. If you get rid of the stock cluster so there is no display and there is no ABS light and there is no TC light then you won't see them anymore.
Last edited by lionelhutz; Aug 12, 2015 at 12:28 AM.
Thread Starter
Instructor
Joined: Jun 2014
Posts: 236
Likes: 53
From: New Zealand
There are no codes for the module when it's dead because you can't communicate with it to get any codes from it. When you read the codes for each module the code reader is asking that module to respond with the codes. The PCM stores drivetrain codes, the EBCM stores ABS type codes, the RDCM stores right door issue codes, the HVAC module stores the heating and AC codes, etc, etc. No module = no comms or no response when looking for codes.
All the triggers for the ABS/AH/TC lights and messages are relayed over the serial bus between the cluster and the EBCM. If the EBCM does not respond to the cluster then the cluster turns-on the ABS and TC lights and displays the service warning by default since it's programmed to do that as a warning that the ABS system is on the fritz. All that you see in front of you on the cluster is due to the cluster programming. If you get rid of the stock cluster so there is no display and there is no ABS light and there is no TC light then you won't see them anymore.
All the triggers for the ABS/AH/TC lights and messages are relayed over the serial bus between the cluster and the EBCM. If the EBCM does not respond to the cluster then the cluster turns-on the ABS and TC lights and displays the service warning by default since it's programmed to do that as a warning that the ABS system is on the fritz. All that you see in front of you on the cluster is due to the cluster programming. If you get rid of the stock cluster so there is no display and there is no ABS light and there is no TC light then you won't see them anymore.
Melting Slicks
Joined: Jul 2004
Posts: 3,092
Likes: 120
From: orlando florida
St. Jude Donor '15
what you could do is remove the bulbs for those two lights. there is a guy that posted on here a while back that made a product that would simulate pushing the reset button on startup to clear the DIC message ticker.
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Melting Slicks
Joined: Jul 2004
Posts: 3,092
Likes: 120
From: orlando florida
St. Jude Donor '15
Dont know if you have the m or v code ebcm. But this would be your easiest and cheapest way around your issue.
https://www.corvetteforum.com/forums...-and-pump.html
https://www.corvetteforum.com/forums...-and-pump.html
Instructor
Joined: Jun 2012
Posts: 185
Likes: 9
From: Ephrata PA
'01+ EBCM in 97-00 C5
Has anybody considered trying the swap in stages? For example first step would be to swap in the EBCM/BPMV and SWPS with the harness alteration to see if electronically it does it fact work then use a Tech 2 to exercise the module. If it didn't work then your not that far into it that you could restore it back, sounds too easy so there must obviously be something I am missing.
Then second step would be to bend the new brake lines or purchase the lines off a salvage C5? This would be for the 99 and 00 years, the 97 & 98 will obviously require a little more work.
Then second step would be to bend the new brake lines or purchase the lines off a salvage C5? This would be for the 99 and 00 years, the 97 & 98 will obviously require a little more work.
Race Director
Joined: Apr 2007
Posts: 11,150
Likes: 890
From: South Western Ontario
I don't know of anyone who has attempted any part of the swap. Lots of people "interested" but that interest ends at actually attempting it. I'm not going to bother because my car isn't broken.
But, it wouldn't be a bad idea to modify the harness to plug-in the newer module and see what happens.
But, it wouldn't be a bad idea to modify the harness to plug-in the newer module and see what happens.
Race Director
Joined: Mar 2004
Posts: 12,466
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From: Fort Wayne IN
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IF my EBCM were to fail I'd dive head first into this. It gives a sporadic ABS/TCS error from time to time so it's coming at some point, but I'm not going to dive in until it's absolutely necessary. Brake lines are kind of my niche thing so plumbing isn't a concern for me.
Instructor
Joined: Jun 2012
Posts: 185
Likes: 9
From: Ephrata PA
'01+ EBCM in 97-00 C5
Yeah I'm in the same spot nothing is wrong with mine yet so it leaves little incentive to actually proceed. If I find a decent deal on the parts I may pick them up and try it sometime over the winter.
Thread Starter
Instructor
Joined: Jun 2014
Posts: 236
Likes: 53
From: New Zealand
Looks like its time to trade in!
I give up ):
Instructor
Joined: Jul 2013
Posts: 202
Likes: 0
From: Moscow (Russia)
I did this swap. From 99 to 2001 EBTCM+BPMV. Later I'll write about this with pictures.
You need:
1) EBTCM+PUMP 2001+
2) Conector
3) Three brake lines. Both front and one of the rear (presumably right already forgot). I swaped only front ones. About rear I just cut it, flared and lengthened it with an Goodridge armored hose.
4) 2001+ SWPS.
New PCM not needed. Now installed 2001 BCM. But I have both of. So can check it.
You need:
1) EBTCM+PUMP 2001+
2) Conector
3) Three brake lines. Both front and one of the rear (presumably right already forgot). I swaped only front ones. About rear I just cut it, flared and lengthened it with an Goodridge armored hose.
4) 2001+ SWPS.
New PCM not needed. Now installed 2001 BCM. But I have both of. So can check it.
Thread Starter
Instructor
Joined: Jun 2014
Posts: 236
Likes: 53
From: New Zealand
I did this swap. From 99 to 2001 EBTCM+BPMV. Later I'll write about this with pictures.
You need:
1) EBTCM+PUMP 2001+
2) Conector
3) Three brake lines. Both front and one of the rear (presumably right already forgot). I swaped only front ones. About rear I just cut it, flared and lengthened it with an Goodridge armored hose.
4) 2001+ SWPS.
New PCM not needed. Now installed 2001 BCM. But I have both of. So can check it.
You need:
1) EBTCM+PUMP 2001+
2) Conector
3) Three brake lines. Both front and one of the rear (presumably right already forgot). I swaped only front ones. About rear I just cut it, flared and lengthened it with an Goodridge armored hose.
4) 2001+ SWPS.
New PCM not needed. Now installed 2001 BCM. But I have both of. So can check it.
Thread Starter
Instructor
Joined: Jun 2014
Posts: 236
Likes: 53
From: New Zealand
Awesome, thanks heaps!! I'm from new Zealand, they are not common here either. I am quite excited about the prospect of doing this mod so I can drive my vette again!!
Instructor
Joined: Jun 2012
Posts: 185
Likes: 9
From: Ephrata PA
I did this swap. From 99 to 2001 EBTCM+BPMV. Later I'll write about this with pictures.
You need:
1) EBTCM+PUMP 2001+
2) Conector
3) Three brake lines. Both front and one of the rear (presumably right already forgot). I swaped only front ones. About rear I just cut it, flared and lengthened it with an Goodridge armored hose.
4) 2001+ SWPS.
New PCM not needed. Now installed 2001 BCM. But I have both of. So can check it.
You need:
1) EBTCM+PUMP 2001+
2) Conector
3) Three brake lines. Both front and one of the rear (presumably right already forgot). I swaped only front ones. About rear I just cut it, flared and lengthened it with an Goodridge armored hose.
4) 2001+ SWPS.
New PCM not needed. Now installed 2001 BCM. But I have both of. So can check it.