Bill Curlee - EBCM/Electrical Problems
Thread Starter
Instructor
Joined: Feb 2006
Posts: 133
Likes: 0
From: Leesburg VA
Bill Curlee - EBCM/Electrical Problems
Bill (and anyone else)...
2002 Vert, slightly modified (intake/exhaust/etc). Replaced the EBCM after it's initial failure back in Nov. Last week, I had a bunch of codes hit at once:
C1248
C1255
B0026
U1160
C1283
and I started getting a "Service Vehicle Soon" message on the DIC. I reset the codes, and the C1248 and C1255 come back immediately, and the C1283 shows up eventually. The others are gone, but I still get the "Service Vehicle Soon" warning.
Additionally, the steering feels stiffer than normal (however, this could purely be psycho-somatic...)
This occurred in the rain (I rarely drive in the rain), and it seems the EBCM is dead again, but the "Service..." message and the stiffer steering has me worried.
Any ideas?
Thanks,
Dave
2002 Vert, slightly modified (intake/exhaust/etc). Replaced the EBCM after it's initial failure back in Nov. Last week, I had a bunch of codes hit at once:
C1248
C1255
B0026
U1160
C1283
and I started getting a "Service Vehicle Soon" message on the DIC. I reset the codes, and the C1248 and C1255 come back immediately, and the C1283 shows up eventually. The others are gone, but I still get the "Service Vehicle Soon" warning.
Additionally, the steering feels stiffer than normal (however, this could purely be psycho-somatic...)
This occurred in the rain (I rarely drive in the rain), and it seems the EBCM is dead again, but the "Service..." message and the stiffer steering has me worried.
Any ideas?
Thanks,
Dave
Tech Contributor
Joined: Dec 2003
Posts: 19,384
Likes: 87
From: Horncastle Lincolnshire, England
2023 C5 of the Year Finalist - Unmodified
Not the standard bunch of codes
I'd be trying the grounds first
Look at Bills electrical sticky and clean up the grounds to see if it improves
It could be the EBCM but I'd try the simple fixes first.
I'd be trying the grounds first
Look at Bills electrical sticky and clean up the grounds to see if it improves
It could be the EBCM but I'd try the simple fixes first.
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
Holy Crap,,,,,your EBTCM isnt happy!
Check the grounds just like DEEGEE stated!
Second,, I would disconnect the main connector and inspect the winchester plug and EBTCM connector. Make sure that there in good shape. Make sure that the wires inside the connector are not damaged or broken.
When you replaced the EBTCM,,,,did you make sure that the seal between the BPMV body and the EBTCM was 100% good. If it isnt, the module may have moisture in it. Thats the next thing that i would check.
The EBTCM makes all the calcuations for active handling and if its not doing them properly, the C1283 DTC will set Excessive time to center steering wheel.
Never seen C1248 DRP Disabled before, Ill have to look that one up!
Check the grounds just like DEEGEE stated!
Second,, I would disconnect the main connector and inspect the winchester plug and EBTCM connector. Make sure that there in good shape. Make sure that the wires inside the connector are not damaged or broken.
When you replaced the EBTCM,,,,did you make sure that the seal between the BPMV body and the EBTCM was 100% good. If it isnt, the module may have moisture in it. Thats the next thing that i would check.
The EBTCM makes all the calcuations for active handling and if its not doing them properly, the C1283 DTC will set Excessive time to center steering wheel.
Never seen C1248 DRP Disabled before, Ill have to look that one up!
Thread Starter
Instructor
Joined: Feb 2006
Posts: 133
Likes: 0
From: Leesburg VA
<<Holy Crap,,,,,your EBTCM isnt happy! >>
I love it when those are the first words out of Bill's mouth...
Both - thanks for the feedback. I'll have to dig into it this weekend. I'll let you know what I find (or more likely, have follow up questions...
)
I love it when those are the first words out of Bill's mouth...
Both - thanks for the feedback. I'll have to dig into it this weekend. I'll let you know what I find (or more likely, have follow up questions...
)
Thread Starter
Instructor
Joined: Feb 2006
Posts: 133
Likes: 0
From: Leesburg VA
Checked the G101 and G102 grounds. G101 was clean, G102 was corroded. I cleaned it, but no cigar. I wasn't able to check the EBTCM connectors, will try that this coming weekend.
If the connection is clean, does this look like a relay failure (absfixer), or a bigger failure?
If the connection is clean, does this look like a relay failure (absfixer), or a bigger failure?
Tech Contributor
Joined: Oct 1999
Posts: 40,999
Likes: 9,764
From: Charlotte, NC (formerly Endicott, NY)
In addition to checking the EBCM connector check the EBCM ground at G108 over by the battery. The ground by the left headlight is for the BPMV. Check the fluid level in the master cylinder and check to see if the parking brake is on or the sensor indicates it is on. C1255 indicates the EBCM has an internal electronics failure. However, C1283 could be caused by the EBCM, the steering wheel position sensor or the lateral accel sensor or by not receiving signals from them. If there is corrosion in the EBCM connector it could be causing these codes. If you don't find a ground or connector problem or something like low brake fluid/parking brake on it looks like the EBCM is toast.
Bill
Bill
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
In addition to checking the EBCM connector check the EBCM ground at G108 over by the battery. The ground by the left headlight is for the BPMV. Check the fluid level in the master cylinder and check to see if the parking brake is on or the sensor indicates it is on. C1255 indicates the EBCM has an internal electronics failure. However, C1283 could be caused by the EBCM, the steering wheel position sensor or the lateral accel sensor or by not receiving signals from them. If there is corrosion in the EBCM connector it could be causing these codes. If you don't find a ground or connector problem or something like low brake fluid/parking brake on it looks like the EBCM is toast.
Bill
Bill
I think you left out 3 or 4 things!
BC
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
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
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
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
YES!! I use something called CORROSIONX. There are other products that do the same thing. Boat places sell som electrical corrosion preventative compounds.
BC
BC
Thread Starter
Instructor
Joined: Feb 2006
Posts: 133
Likes: 0
From: Leesburg VA
Sorry I haven't posted...
I followed the Bill Curlee's advice, no luck. As a side note, the grounds near the headlights were just like Bill's sticky - one was immaculate, the other was corroded.
I'll look at Bill Dearborn's suggestions this weekend.
Thanks, guys! I'll post the next round of results...
I followed the Bill Curlee's advice, no luck. As a side note, the grounds near the headlights were just like Bill's sticky - one was immaculate, the other was corroded.
I'll look at Bill Dearborn's suggestions this weekend.
Thanks, guys! I'll post the next round of results...
Burning Brakes
Joined: Jul 2005
Posts: 788
Likes: 33
From: Cedar Rapids IA
Do you use any type of grease/sealer to help seal the weatherpak connector?
1st Gear
Joined: Sep 2012
Posts: 1
Likes: 0
won't start due to electrical problem
Good morning Bill,
My name is Kimberly and from Jacksonville, FL.
My 2003 50th Anniversary Special Edition won't start due to electrical problem and was advised by Jerry Hamm Chevrolet to trade in the car due to costs and not being able to find the cause. Battery brand new and brand new ignition switch. Any idea as to the cause of no start? Really don't want to trade due to economy. Please help and advise.
Thank you so much, Kimberly
My name is Kimberly and from Jacksonville, FL.
My 2003 50th Anniversary Special Edition won't start due to electrical problem and was advised by Jerry Hamm Chevrolet to trade in the car due to costs and not being able to find the cause. Battery brand new and brand new ignition switch. Any idea as to the cause of no start? Really don't want to trade due to economy. Please help and advise.
Thank you so much, Kimberly
Team Owner
Joined: May 2003
Posts: 23,480
Likes: 9
From: East Meadow NY
St. Jude Donor '12
Good morning Bill,
My name is Kimberly and from Jacksonville, FL.
My 2003 50th Anniversary Special Edition won't start due to electrical problem and was advised by Jerry Hamm Chevrolet to trade in the car due to costs and not being able to find the cause. Battery brand new and brand new ignition switch. Any idea as to the cause of no start? Really don't want to trade due to economy. Please help and advise.
Thank you so much, Kimberly
My name is Kimberly and from Jacksonville, FL.
My 2003 50th Anniversary Special Edition won't start due to electrical problem and was advised by Jerry Hamm Chevrolet to trade in the car due to costs and not being able to find the cause. Battery brand new and brand new ignition switch. Any idea as to the cause of no start? Really don't want to trade due to economy. Please help and advise.
Thank you so much, Kimberly
I would suggest starting a new thread with your symptoms and the list of codes. You can use the following link to help. http://www.stengel.net/diccodes.htm
That is the first step for any diagnosis.
Last edited by chaase; Sep 4, 2012 at 09:56 AM.
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
Good morning Bill,
My name is Kimberly and from Jacksonville, FL.
My 2003 50th Anniversary Special Edition won't start due to electrical problem and was advised by Jerry Hamm Chevrolet to trade in the car due to costs and not being able to find the cause. Battery brand new and brand new ignition switch. Any idea as to the cause of no start? Really don't want to trade due to economy. Please help and advise.
Thank you so much, Kimberly
My name is Kimberly and from Jacksonville, FL.
My 2003 50th Anniversary Special Edition won't start due to electrical problem and was advised by Jerry Hamm Chevrolet to trade in the car due to costs and not being able to find the cause. Battery brand new and brand new ignition switch. Any idea as to the cause of no start? Really don't want to trade due to economy. Please help and advise.
Thank you so much, Kimberly
You are at a STEALERSHIP.
They see MONEY DRIPPING out of your pocket and into theirs!
Any mechanic that can not figure out why a C5 wont start is either CROOKED, INCOMPENET, STUPID or ALL THREE!!!!! When we get your car to run properly, you can QUOTE me on that!
My STRONGEST recommendation is to:
RUN KIMBERLY,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,R UN away!!
PM sent with my phone number!
Bill
Last edited by Bill Curlee; Sep 4, 2012 at 12:10 PM.
Instructor
Joined: Feb 2012
Posts: 102
Likes: 2
Why would they want the trade-in if this is such an expensive problem to fix? Was there a sign out front that said "Dead Corvette Storage?" No? Well that's because storing dead Corvettes ain't their business! Selling them new and used, on the other hand, is. I, too, am glad you didn't listen.
