EBD, ABS and ESC Inoperative - Also no power steering
I've tried cleaning the pins with contact cleaner which did jack. I think before, simply reseating to connector fixed the issue.
I'm going to yank the module and open it up over the weekend. Could be something simple thats noticeable on the PCB. A few indy places sell refurbished units so it can't be all that complicated to fix. It gets hot as fuçk under there with lots of vibration and I don't think the little heat shield does much.
Here's what the module looks like.
However, after failing for 2 days (including power steering), it miraculously was fine for the 6 weeks I ended up waiting to get it repaired.
Don't rush, it may clear itself... there are a few threads on this.
I've tried cleaning the pins with contact cleaner which did jack. I think before, simply reseating to connector fixed the issue.
I'm going to yank the module and open it up over the weekend. Could be something simple thats noticeable on the PCB. A few indy places sell refurbished units so it can't be all that complicated to fix. It gets hot as fuçk under there with lots of vibration and I don't think the little heat shield does much.
I'm curious if these failures are caused by a cold solder joint? The heat shield protecting the module is likely inadequate and there's a lot of vibration where it's mounted.
I have been seeing this issue off an on now and it appears to be getting more frequent.
Another thing I have learned for those with a tune. Most likely all tunes have increased TRQ values. With modified ESP based parameters in the ECU file to allow for greater wheel spin before ESP intervention. There are also acceleration based maps that are modified to prevent ESP from “killing the power” or so to speak.
The last time I had an issue, I tried everything previously mentioned in this thread. The module was faulting for a sold 2 wks. I decided to let the dealer confirm the module was faulty so I loaded the OEM tune to prep for the visit. The problem disappeared after a couple drive cycles so I cancelled the appointment.
Car was fine for 2 wks before it came back again. Loading the OEM tune didn't help. Made another appointment for a scan, was faulting constantly for about a week then magically stopped.
Next time it start faulting consistently I will make another appointment. I'd like the see the output from the star diagnostic scan for the module.
I'm tempted to cut the module cover off to expose the PCB. I'd bet a beer there's an obvious issue.
I'm still waiting to find out if a used module can be reprogrammed. It may use a PROM so write once sort of deal.
Cheapest new I could find below.
https://parts.com/index.cfm?fuseacti...CONTROL-MODULE
I'm still waiting to find out if a used module can be reprogrammed. It may use a PROM so write once sort of deal.
Cheapest new I could find below.
https://parts.com/index.cfm?fuseacti...CONTROL-MODULE
Is your car still faulting?
I'm going to clean the hub rings and sensors tomorrow see if that works.
Read the ESP codes first. If it's a module fault, cleaning the rear hub sensor rings won't help. Just the act of clearing the codes has worked previously (worked for AMG3.2 as well after he had an issue swapping headbolts).
The Best of Mercedes & AMG
STAR cleared it and it hasn't come back since.
Read the ESP codes first. If it's a module fault, cleaning the rear hub sensor rings won't help. Just the act of clearing the codes has worked previously (worked for AMG3.2 as well after he had an issue swapping headbolts).
I'll try scanning and clearing. See if that works.
This issue only came up after I did intake manifold gaskets and PCV. About a week later. Is there an ABS sensor somewhere near the intake manifold that perhaps I didn't plug back in correctly? I checked and everything seems secure .... Where is this module located?
Do you have any diagnosing tools? It could be faulting because of a faulty ESP sensor. Get the ESP fault read before moving forward.
Others have had to replace the steering angle sensor, wheel speed sensor, or yaw sensor.
EDIT: Also verify your running voltage to eliminate the voltage regulator on the alternator.
Last edited by Jasonoff; Oct 5, 2016 at 06:14 PM.
I initially had wheel speed sensor faults. Cleaning the rear hub tone rings fixed the problem.
Now the generic module fault comes and goes unrelated to temperature, humidity so it appears to be completely random. It will likely need to be replaced some time in the future.
Absolutely no idea if this will help but.....
I have had this warning light on several occasions. The one time that it was not battery related (low charge and/or failing battery) I finally got it to go away by resetting the steering angle sensor. I hadn't had any steering issues or even struck a curb or pothole hard, but it was suggested to do it anyways. I did this by turning the wheels full lock to full lock side to side 5 times, then restarting the car. An immediate restart didn't do it, but a 20 minute sit and then a restart did. I have no idea why it would need the full reboot for the sensor reset, but it seems like it did.
Always worth a try boys.


Absolutely no idea if this will help but.....
I have had this warning light on several occasions. The one time that it was not battery related (low charge and/or failing battery) I finally got it to go away by resetting the steering angle sensor. I hadn't had any steering issues or even struck a curb or pothole hard, but it was suggested to do it anyways. I did this by turning the wheels full lock to full lock side to side 5 times, then restarting the car. An immediate restart didn't do it, but a 20 minute sit and then a restart did. I have no idea why it would need the full reboot for the sensor reset, but it seems like it did.
Always worth a try boys.
I can only assume that I had a low voltage related issue originally and it's been nagging in the system, and that just disconnecting the battery did a hard reset of something. Happy about the outcome for sure.
K
Strange how that happens.
K





