Does clearing code with the reset button work or is it a must to disconnect the battery?

 

You can clear the codes using the reset button.

 

Well that tells me I still have a problem because they come right back and yesterday............. I was coming down a hill and had to break hard for car car that stopped fast and my breaks locked and stayed locked.

 

You should have an ABS indicator showing on the instrument panel and there ought to be a warning on the DIC.

Check your diagnostic codes on the car by turning on the ignition and then pressing and holding the options button while at the same time pushing the fuel button 4 times. This will start the On Board Diagnostic display and the DIC will display ever code on the car. Post them here (include all the letters and numbers) and somebody can help. Also we need to know what year your car is.

Bill

 

1233 c h 1234 h 1255 h 1284 h I have cleaned the connections going to the front grounds and the left rear wheel sensor where it connects to the hub also the connections that are on the abm

 

i assume you are talking about dic codes. i am not aware that all of the codes go away if you unplug the battery but here is the correct way to read and reset codes. you can relay the codes on this forum and get help deciphering. be sure to get all of the code - the c or h after the code indicates history and current so make sure you copy the prefix and suffix not just the number.
follow this procedure to read and reset:

https://www.corvetteforum.com/techti...D=26&TopicID=1

sorry, it took me so long to find the correct thread for you on procedure that others have also given you some appropriate info. i'll leave this in in case you need the full procedure but it sounds like you already know what you need to know.

 

The correct way to clear DTC is with the reset button. If you disconnect the battery,,,that sometimes causes DTCs error code in it self and then they would need to be cleared!

Clearing the DTC does NOT cure or resolve the issue. If it is a history DTC, sometimes it just means that something glitched and it fine now. If a DTC will not clear, it means that it is CURRENT (happening NOW) and the issue will need to be fixed.

BC

 

C1233 RF Wheel Speed Circ Open or Shorted
C1234 LR Wheel Speed Circ Open or Shorted
C1255 EBTCM Internal Malfunction
C1284 Lateral Accel Malfunction

If you have already checked the grounds for the EBCM .... ignore the other codes .... the C1255 is an EBCM "kiss of death" .... your EBCM needs replacement.

Contact Brandon at http://www.absfixer.com

and see if he has anything to help you out. If not, a new EBCM for a 1998 is about $1,400.00 from a dealer. Forum supporting parts vendors such as ....

http://www.gmpartsdirect.com

and

http://www.gmpartshouse.com

should sell it for less.

 

Thought it was odd the 1255 was a history and not current code. Does that not made a difference? This poor car is having MANY electric issues. Too many years up north During inspection the horn was a corroded rust ball.

 

The EBCM is different than, say, the PCM, in that it resets ALL codes to H satus when you shut off the engine. This allows it to re-run all diagnostics at engine start in an attempt to give you full services. If a diagnostic passes you still have the "History" code for diagnostic purposes ..... and if any problem arises during that ignition cycle a code will be set with a "Current" status.

If you display codes with the engine running you will (unfortunately) see the C1255 in a "Current" status.

Given the car has had rust issues ..... there are two ground points to check (and clean) for the EBCM. It is POSSIBLE (unlikely, though) that the C1255 is caused by a bad ground

G103 is located on the driver's side. It is on the vehicle frame close to the EBCM.

G108 is locatedd on the passenger side. It is below the battery, and just behind where the battery negative cable is grounded to the frame.

Check and make sure both of those are good "metal to metal" contacts with the grounding wires and frame. Remember, the Corvette is basically a plastic body on a metal frame so frame grounding for all components is critical to electrical performance.

 

Since you have a 98,,,Is the EBTCM Front or REAR mounted. It makes a difference on ground cleaning. The rear mounted EBTCM/BPMV ground is located on the passengers side frame rail in the passengers rear wheel well on the side of the frame.

The front mounted EBTCM is grounded at G-101 and 104.

The 97-98 rear mounted EBTCM's are unique in that they are very different than any of the front mounted modules. They look like this:



The ground for the module starts at the motor on the BPMV:



Then it goes to the frame at G402.

If yours is front mounted, the motor still has the same ground stud and that grounds at G-101.

The electronic EBTCM for that years front mounted unit also has a ground that goes to G-104 near the battery



Contact ABS Fixer. I do not believe that he can fix a rear mounted early 97-98 module.

I also had an early 98 and ALL of the grounds were compromised. Once they were serviced, the world was a much nicer place.

Bill C

 

Ir is up front between the motor and rad. I have checked the grounds up front but will look for the post on the pump motor.

 

If you are comfortable that you have checked the ground points for the EBCM .... and you are still getting a C1255 ....
Again, contact Brandon at absfixer .... I don't know if he can fix a C1255 ..... if he can't, maybe he an offer a rebuilt unit.

After you get the EBCM working "correctly", then we can fix any remaining DTC that are occuring .... but until you have a computer (EBCM) that works, chasing other codes is pretty much a awaste of time.

Good luck,