Just recently I got in my 02 c5 z06 that I drive quite rarely now and I look down and I see SERVICE ABS / TCS come up on my display . I have had the car almost two years and had not one problem with this let alone any other elec. malfunction. I figured this was just some kind of glitch so I did a manual diagnostic scan on it and came up with whats looked to be seven codes under (AO LDCM) seven under (RDCM) and just one under TCS. I havent had any issues with braking on the car while the light has been on to make matters a little more confusing. I reset all codes but the TCS code it would not let me reset it. I have tried disconnecting the battery and allowing it to sit idle for 30+ minutes before reinstalling the negative terminal. Any ideas or suggestions would be greaty appreciated. car has 30k miles on it and is rarely driven more then a few miles a week.

the various codes I got down where as follows

TCS- C1214

B2284, U1064 U1016 U1096 B2283 B2285

^Im not sure these are relevant to the ABS/TCS lights but I wanted to list just in case.

 

You will not have any problems braking normally. ABS only activates when braking conditions aren't so called normal and the base brakes will work as they are supposed to work. C1214 probably has a probability that you have a fatal error in the EBCM. That code indicates the relay inside the module isn't making good contact and thus not providing proper voltage to the Brake Pressure Modulator Valve. But before you do anything about the module you should clean the grounds at G103 and G108 plus the connector pins connecting the EBCM with the underhood electrical center fuses and see what happens. If cleaning grounds and connector pins doesn't work then you need to send the EBCM to the ABS fixer for repair. I don't have his web site or phone number but it has been posted quite frequently on the forum.

Bill

 

I just recently changed the battery and voltage seems to stay at a correct level so I am hoping this error that the car is creating will be fixed once I clean these terminals and connectors that you speak of. Once I clean these terminals do I need to disconnect the battery again or should I just disconnect it prior to cleaning the mentioned locations? Will I need to remove these codes manually again or should it go away on its own? I attempted to reset the C1214 and it wouldnt allow me to remove it from Manual Diagnostics. This car does usuallt remain outside so I am hoping its corrosion that is causing the malfunction. Thanks a million ahead

 

It doesn't hurt to disconnect the battery while you are playing with the electrical system. Delete the code once you are done and then start the engine and see if the I/P light lights up. Then drive a short distance to see if everything stays working. Most people that get this error usually end up replacing the EBCM or getting it fixed. I had the same code on my 03Z last year and the EBCM and BPMV both had to be replaced to resolve the problem. Its great to have the GMPP.

Bill

 

I tried to remove the code through manual diagnostics and it would not allow me to erase it while the car was off. I will try and see if I can clean the terminals and check connections and hope for the best. Any reason why this would not allow me to remove the C1214.

and before i forget where is the 108 ground your talking about? I didnt see it on any diagrams????

 

Brandon....just emailed you my how-to fix it tutorial...Bill T

 

I got it on my blackberry this morning, I have been through all the ground points and cleaned them. Still have the code after pulling the battery for a second time while cleaning the ground point under the battery. I am gonna take a closer look into the actual unit itself and take it from there.

 

The infamous C1214 code. Be prepared to replace your EBCM if the ground check/Battery stuff doesn't work.

If you are a remotely competent at using hand tools. Go to absfixer.com and get your EBCM rebuilt, and reinstall it. It will save you a TON of money. I had the same issue and it has been almost a year and 0 problems.

 

any chance it could be a fuse that could be the problem? Which fuses points should I look for that have any kind of direct linkage to the EBCM or BPVM or are there non at all in the engine bay and or passenger fuse panel

 

My wife's daily driver had the same failure code and symptoms assert as described in this thread. I performed the diagnostics as descibed in the factory repair manual. It directed me to replace the EBCM.

This is @ $1500.00 repair if you hand the keys to the dealer and have them fix it.

The part at the the dealership is anywhere between $500.00 and $900.00 depending upon your dealership.

The part (#9367071) is available new at gmpartsdirect.com for $365.84 shipped to my door.

I swapped the module from my occasionally driven 2004 Z06 to my wife's 2001 Convertible, so that she would be safe in her daily travels, and sent the bad module off to Brandon Hite @ absfixer.com today.

I hope that all goes well with the repair and turn around time, but this was the most cost effective repair available. You do not know what you are getting if you purchase a module like this from a salvage yard.

You can drive the car with the module removed from the brake control valve body. It is secured to the valve body with 6 # 20 Torx screws.

Make sure to protect and secure the 2 loose plugs if you intend to drive the car without the ABS module in place.

In this condition, you will see the service vehicle soon displayed in the DIC, due to lost communication with the the EBCM. The power steering also defaults to a low pressure assist mode, which makes the vehicle harder to steer at lower speeds, due to the lessend effect of the power steering input.

After the module is replaced, clear all of the DTC Codes and test drive the car.

Don

 

No ... read what trussme sent you .... the fuses have NOTHING to do with a C1214.

Think about it ... if a fuse was blown ... how would the EBCM computer be reporting a C1214 ....... ??????

Clean the grounds for the EBCM ... that will SOMETIMES fix a C1214. If the grounds are bad ... then repairing/replacing the EBCM is money down the drain as with a bad ground a new/fixed EBCM will still fail.

1) CLEAN THE GROUNDS

2) REPAIR (absfixer) or REPLACE (for mucho $$$$$) the EBCM.

Simple as that.

 

anyone with a good picture of the ground you speak of to check. Im pretty sure I cleaned the one by the alternator already and no change but is there a plug the goes into the unit itself that could be loose or corrodedthat could be the fix? I just want to make sure I have checked every possible avenue before I pull the unit...thanks ahead guys! I know alot about these cars but these components dont happen to be one of them!

 

There are two connectors for the wiring to the EBCM. They are weather protected but if you want to open them and check them ... have at it.

The two grounds are G103 and G108. Sounds like you already checked G103 (on the frame rail by the alternator) ... G108 is on the frame rail - passenger side - behind where the battery NEGATIVE cable is attached to the battery. There are two grounds in that area ... G104 and G108 .... G108 is the rearmost of them .... but I'd recommend you clean everything in that area ... often battery acid causes corrosion of those grounds.

Once you have verified the grounds are clean ... then shipping the EBCM to absfixer is the next step .....

http://www.absfixer.com

Which trussme also emailed you.

You can drive the car while the EBCM is removed .... just remember you have no ABS protection, and your steering will feel "different" as the EBCM also controls Magnasteer.

 

Well gents....after removing and cleaning all the grounds I decided to say what the hell....I ll drive her down with to the MB corvette show and after all the festivites on the way back to town I notice I have NO DICs any longer on my display! I hope this fixs the issue at hand but I plan on keeping my eyes on her and see if the deadly c1214 returns...thanks a bunch guys for all your attention!