EBTCM crossover
Thread Starter
Melting Slicks
Joined: Jul 2004
Posts: 3,092
Likes: 120
From: orlando florida
St. Jude Donor '15
EBTCM crossover
just picked up an EBTCM with pump to replace mine that has code 1225. just making sure there won't be any problems swapping.
mine in the car says MSVA. one i'm replacing says MSVA2
mine in the car says MSVA. one i'm replacing says MSVA2
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Why would you replace the module when you have a C-1225???
1225 is a Left Front Excessive Wheel Speed Variation. That is normally caused by a bad jumper harness, bad female pin / poor male to female pin contact and or a bad wheel speed sensor in the wheel hub.
Ive seen this 200 times and checking the contacts for bent/spread apart female pins is the very first step.
I wouldn't replace the module/pump until you check out the signal from the wheel speed sensor.
I have no idea if that one will replace yours or not.
Bill
Melting Slicks
Joined: Mar 2012
Posts: 2,800
Likes: 456
From: USA
I found this post that is dealing with interchangeability. Hope this helps out.
https://www.corvetteforum.com/forums...s-modules.html
https://www.corvetteforum.com/forums...s-modules.html
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Ohhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh ,,,,
That's DIFFERENT!
Have you actually MEASURED the voltage being supplied on each fuse to insure that its full battery voltage?
Checked for the ground to the module.
If the answer is YES,,, time to get a new module.
Bill
That's DIFFERENT!
Have you actually MEASURED the voltage being supplied on each fuse to insure that its full battery voltage?
Checked for the ground to the module.
If the answer is YES,,, time to get a new module.
Bill
Thread Starter
Melting Slicks
Joined: Jul 2004
Posts: 3,092
Likes: 120
From: orlando florida
St. Jude Donor '15
Back when i probed the wires, I think I showed power at the connector for the switched power.
Last edited by mrr23; May 25, 2016 at 06:48 AM.
Thread Starter
Melting Slicks
Joined: Jul 2004
Posts: 3,092
Likes: 120
From: orlando florida
St. Jude Donor '15
I found this post that is dealing with interchangeability. Hope this helps out.
https://www.corvetteforum.com/forums...s-modules.html
https://www.corvetteforum.com/forums...s-modules.html
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
WELL.................................... ..... You MUST have full battery voltage on the HOT AT ALL TIMES bus AND The HOT IN RUN& START BUSs ( which is the IGNITION SWITCH )
If it were me,,,,,,,,,,,,,,,,,, I would change out the IGNITION SWITCH to see if that solves the issue..
BC
If it were me,,,,,,,,,,,,,,,,,, I would change out the IGNITION SWITCH to see if that solves the issue..
BC
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
Thread Starter
Melting Slicks
Joined: Jul 2004
Posts: 3,092
Likes: 120
From: orlando florida
St. Jude Donor '15
WELL.................................... ..... You MUST have full battery voltage on the HOT AT ALL TIMES bus AND The HOT IN RUN& START BUSs ( which is the IGNITION SWITCH )
If it were me,,,,,,,,,,,,,,,,,, I would change out the IGNITION SWITCH to see if that solves the issue..
BC
If it were me,,,,,,,,,,,,,,,,,, I would change out the IGNITION SWITCH to see if that solves the issue..
BC
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
PLEASE examine the FEMALE PINS and MAKE SURE that they are not SPREAD APART and not making proper contact with the male pins.
The correct way to test the female pins is by doing a PUSH PULL test with a spare male pin or something the same thickness as the male pin.
The correct way to test the female pins is by doing a PUSH PULL test with a spare male pin or something the same thickness as the male pin.
Thread Starter
Melting Slicks
Joined: Jul 2004
Posts: 3,092
Likes: 120
From: orlando florida
St. Jude Donor '15
Tested all wires, battery, and back of alternator. 13.5 volts across the board. Took a pick to bend the female pins some. No change. Cleared codes and 1255 immediately comes back. I may play with the pins some more when I get home.
Might plug the module in and ground it to see what happens
Might plug the module in and ground it to see what happens
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Well,,,,,,,,,,,,,,,,,,,, I took my module apart and was APALLED at the **** POOR solder job that DELPHI did on the power board.
It literally SUCKED! If all else fails, pop the guts out of the case and examine all the solder joints and see if you can find the one that FAILED.
If you decide to get into the module,,, ITS SILICONE RTV sealed into the case and difficult to press it out. It can be done but you have to do it carefully. Theres a special HOLE in the case that you can insert a screw and that pries the board out.
It literally SUCKED! If all else fails, pop the guts out of the case and examine all the solder joints and see if you can find the one that FAILED.
If you decide to get into the module,,, ITS SILICONE RTV sealed into the case and difficult to press it out. It can be done but you have to do it carefully. Theres a special HOLE in the case that you can insert a screw and that pries the board out.
Last edited by Bill Curlee; May 25, 2016 at 02:27 PM.
Thread Starter
Melting Slicks
Joined: Jul 2004
Posts: 3,092
Likes: 120
From: orlando florida
St. Jude Donor '15
i bought an entire unit including pump. i'll just swap the whole thing just in case the motor was causing too much voltage draw.
just plugged the replacement unit into the connector. only code i received after clearing them was C1242 because i did not plug the ground wire to the pump motor in. best thing is C1255 is gone!!. time to swap.
just plugged the replacement unit into the connector. only code i received after clearing them was C1242 because i did not plug the ground wire to the pump motor in. best thing is C1255 is gone!!. time to swap.
Last edited by mrr23; May 25, 2016 at 08:16 PM.
Thread Starter
Melting Slicks
Joined: Jul 2004
Posts: 3,092
Likes: 120
From: orlando florida
St. Jude Donor '15