RockyMountain Z

Best of luck

NVL_AV8R

I rest my case. I hope you have no more issues.

BAMAGOLFER

Not sure if this is the same issue but here goes.
I was driving back from Ky. this Sunday, had been driving ~5 hours and everything was running smooth. I'm doing 80-85 in the left lane when suddenly I loose all power,engine and electrical. Luckly I was able to get to the right shoulder but it was very intense due to all the traffic around me. Once I got pulled over there was a relay ticking somewhere and the dash lights were flashing in unison with the relay. I could not get the car to restart. Eventually had it flat bedded to chevy dealership in LaGrange, Ga. When they checked the car Monday AM they said the ABS module had shorted. This in turn opened up the CAN bus which shut down the ECM & BCM. Supposedly they bypassed the ABS module (can they do that?)and the car was running but I don't have ABS. I drove the car home without incident but am worried about just what is wrong with it. Oh yeah they want ~$1500 to replace the ABS module.
I do seem to recall seeing "Service ABS" as all the excitment was happening but it hasn't come up since.

Sorry for the long post but wanted to be clear as to what happened.
Car is an 07 ZO6 with 46K miles and the telescoping steering wheel.

Kelly

Bill Curlee

Sounds about par for the course. You can disconnect the EBTCM and that will isolate it from the rest of the vehicle. If I were you, I would inspect the connector and wiring harness for damage. Look for shorted damaged wires and pins. Read the EBTCM data pin to module ground and see if it is shorted:

Heres the only C6 schematic that I have (05 off of ESI) so I hope that its the same as 07.

Module ground is Pin F

Can buss POSITIVE is B11
Can buss Negative is B10

Looks like its a shielded wire and the shields are B12 & B9

If disconnecting the module from the car fixed the problem, the connector and the wiring is most likely fine.

The STEALERSHIPS gets a premium for all their parts. Contact Gene Culley www.gmpartshouse.com and see what he can do for price. The EBTCM is a plug and play module that you can change your self and save a boat load of cash!

Heres the procedure:

Electronic Brake Control Module (EBCM) Replacement
Removal Procedure
Turn the ignition switch to the OFF position.
Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
Disconnect the brake fluid pressure sensor connector.
Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
Remove the two bracket bolts.



Disconnect the electronic brake control module (EBCM) connector.



Remove the four EBCM to brake pressure modulator valve (BPMV) bolts.
Separate the EBCM from the BPMV by gently pulling apart until separated.
Installation Procedure
Clean the BPMV seal surface with alcohol using a clean rag.
Notice: Refer to Fastener Notice in Cautions and Notices.





Install the EBCM to the BPMV.
Tighten the four mounting bolts in the following sequence:

Tighten

• First pass to 3 N·m (27 lb in).

• Second pass to 6 N·m (53 lb in).

Connect the EBCM connector.
Connect the brake fluid pressure sensor connector.



Install the two BPMV bracket bolts.

Tighten
Tighten the bolt to 27 N·m (20 lb ft).

Lower the vehicle.
Turn the ignition switch to the ON position, engine off.
Perform the Diagnostic System Check - Vehicle in Vehicle DTC Information.

Gene will give you the best price! A LOT better than the STEALERSHIPS!

Good luck and keep us informed on the results of your repair.

Bill Curlee

Woops,,,,forgot the schematic:

2005 C6 EBCM:



2005 is the ONLY C6 schematic that I have at the moment.

NVL_AV8R

Bill, great write up on that fix! Is this the same issue though? Service Active Handling vice Service ABS? Just trying to clarify.

Thanks

Bill Curlee

YOUR PREVIOUS POST ALLOWED ME TO GET THIS FAR!!

This is ONLY a temp fix. I'm POSITIVE it will be back as soon as there is enough movement in the connector components.

Hopefully,,,,,,,,,,,,,,,GM will man up and provide a repair.

BC

NVL_AV8R

Copy all. GM are IDIOTS if they don't address this issue with the current climate with Toyota's acceleration issues. It can be argued that our issue is just as dangerous.

GM is recalling several vehicles but not the vette

The Cars included in the current GM Recall List:

·2005 - 2010 Chevrolet Cobalt
·2007 - 2010 Pontiac G5
·2005 - 2006 Pontiac Pursuit (Canada)
·2005 - 2006 Pontiac G4 (Mexico)

Thanks for all the hard work Bill!

Tony

Bill Dearborn

Why? It isn't a safety issue. When the Service Message shows up the system shuts off. You don't need the ABS/TC/AH to drive the car safely.

Bill

KarlK

Maybe so, but limp mode sucks.

Bill Dearborn

Lack of any of those features doesn't cause any limp mode.

Bill

jimhild

We have a 2008 Convertible with A6 and F55. Our situation is a little different. The steering Column fix was installed several months ago with little effect.

under mild acceleration either turning or just straight out the Service Active Handing, Service Traction Control, Service ABS errors appear. They remain on the DIC until the engine is restarted.

However, when the service tech tries to read out codes with the Tech-II there are no codes stored. GM tech services tells him that cannot happen and a code must be stored, but there is no code.

last week GM installed a data recorder and they are trying to analyze the recordings to see if any codes are captured, no feedback yet.

I will keep you updated on what we find.

UPDATE 1:

The data recorder had no information captured even though the messages appeared on the DIC. We will try the data recorder again and see if anything can be captured. I am printing out this total forum entry and taking to the tech.
will keep everyone informed if anything pops up, except a message.

KarlK

PM sent

Bill Curlee

NVL_AV8R

Service ACTIVE HANDLING SYSTEM is the message I got. Have not had an issue since I did my fix.

Karl

Each time that you turn off the ignition, the EBTCM resets its self. Ask them to look for DTCs when the problem is current and connect the TECH II with out turning off the ignition.

See if you can wiggle and pull "lightly" on the Steering Wheel Position Sensor cable and cause the problem. You will need to remove the close out panel under the drivers dash. Its not too difficult. Heres a picture of the SWPS and the cable;

BigNastyZO7

when these lights come on does anyone notice that the steering wheel becomes harder to turn as well?

Bill Curlee

YES! Thats because the magasteer is part of the EBTCM and defaults to OFF when the module has a service active handling error.

Woops,,,C6 calls it VARIABLE EFFORT STEERING!

KarlK

No steering change on mine, but it's an 06

LS WON

Don't have tilt / telecoping wheel option on 2005 on mine.

fordspanker

hi

I am new to the forum as well just had this happen to my 09 vett we just put a Edelbrock super charger on and now when i accelerate hard i get these warning lights you have mentioned in this post never happened before until i got more power to the rear wheels possibly a different problem. ?

please advise

thanks Dan

SgtRod

I've spent some time away from this issue as I had quit cold turkey. This is the back ground.. I had Catted LG pros with Bullets and thats when it started. I fisrt thought it was the header install. It would come on at WOT at exactly 5k rpm. (AH "intervention")

I tried the following in a relentless persuit to keep my vette.. Tuning to adjust to tire sizes(invo), Doing the clip on the steering column, brakes, grounds checked, new SWPS and even a new EBCM!! This issue along with being modded got me kicked out of a a couple of places... I was postal!

At the end, a local tech at a dealer found the issue was that my car simply did not agree with the exhaust combo. The vibration/tone was too much for the electric sensor. I chose to keep the headers and go with Z NPPs and it completely went away for good!!! This was my experience.