|03-24-2013 07:10 PM|
Back from the dead...
**I take zero personal liability for the information contained herein.
**For all inclusive liability issues... I will not pointedly describe certain specifics, but more to the point, instead give you a direction of thought on what *may* need to be considered for one to get this to work.
**I will also advise one to purchase factory 'Workshop and Wiring Diagrams' from HELM Publications (on CD/DVD.)
Now... with that out of the way. Here is the the basic operational logic behind the Electronic Stability Control (ESC) and what happens:
1. An interrupt to the Electronic Steering Sensor Module (SASM)
2. An interrupt to the Lateral/Longitudinal rate sensors within the Restraints Control Module (RCM)
3. An interrupt to the Yaw rate sensor within the Restraints Control Module (RCM)
Notice that I left off any mention of any kind of interrupt to any Wheel Speed Sensor (WSS.) An interrupt to any WSS will hard fault (and set a DTC code) within the ABS... so, since that isn't a direction that we are interested in... faulting any WSS isn't going to be a player in this.
When reading the logic of the individual systems description and their subsequent operation the three listed interruptions will not disable the Anti-lock Braking System (ABS) nor will effect Dynamic Proportioning through the Electronic Brake Distribution (EBD.) However, I also believe that it may in some way influence operations of associated systems... but likely not hard fault an "ABS" trigger (set a DTC code/red fault indication) within the the Instrument Panel Cluster (IPC.)
The idea is to only interrupt as little as possible without effecting other systems, or... inducing an unsafe operation as an effect from deliberate interruption.
At most any of this will likely introduce a soft fault and possibly set codes in the range of "C0061:xx to C0063:xx"... which can be reset with a scan tool upon fault removal and completing "Diagnostic Routine W."
Another though... would be to install the factory "ST" switch into the car. Here is why that might be a player:
The F-150 owners had issues with the locking differential and stability control, very much like the Focus have now... and by replacing the BCM with that of one from its brother, the Raptor... it worked just the same for the non-Raptor F-150's and they gained control of the locking differential and the ability to shut off the ESC.
Like the F-150... the wiring is already there. However, with the Focus... what is unknown or untested is whether or not the programming is there to support it.
An interesting subject to kick around though...
|01-06-2013 09:20 AM|
|yeroc40||Awesome, thanks MM!|
|01-05-2013 11:52 PM|
The RCM also controls the airbags.
|01-05-2013 11:45 PM|
Direct switch and no mods to the car itself, completely reversible. Cheers
|01-05-2013 10:58 PM|
|01-05-2013 04:58 PM|
I have wired an over-ride switch on the fuse to disable the TCS/ESC/ABS etc. and the speedo works fine with the switch off (everything disabled).
On that note, I don't believe there is any way to disable just certain parts of the system. It's all or nothing until there is a tune done for the car.
|01-05-2013 01:48 PM|
When you unplug the fuse you disable the traction control, anti-lock brakes and the speedo.
Where is the Yaw sensor located?
|01-05-2013 01:47 PM|
|BetaDnB||Can't be done at the present time. Hopefully somebody will release a tuner within the next century that will make this possible.|
|01-05-2013 01:42 PM|
|erato||In the EU ESC will be mandatory on new cars in a few years. Guess the option to turn it off will go out the window simultanously.|
|01-05-2013 01:36 PM|
|zehkaiser||My understanding is that all of that was run through a single fuse (that people were using for a switch to enable/disable all). I'm not sure you can disable just ESC with a switch.|
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