ABS

[Superstang11]

I have all the pieces now and believe I have the vast majority of the wiring figured out. In the post you made what is the RNC that you referenced?

I believe, if I'm not mistaken, he means the restraints control module. Maybe just miss typed.

What are you planning on using for the can bus brake signal?

 

[Tri-bar]

I have all the pieces now and believe I have the vast majority of the wiring figured out. In the post you made what is the RNC that you referenced?

The RCM "Restraint control module" is used as the brake switch in the 2011+ mustangs, it would control the seat belts; air bags alll the safety stuff.

 

[D2DJeremy]

I believe, if I'm not mistaken, he means the restraints control module. Maybe just miss typed.

What are you planning on using for the can bus brake signal?

It doesn't seem to need one.

 

[Superstang11]

The RCM "Restraint control module" is used as the brake switch in the 2011+ mustangs, it would control the seat belts; air bags alll the safety stuff.

Thanks for replying. I guess I wasn't able to see the brake position switch in the wiring diagrams I came across the pin out from the screenshot in this thread. Do you happen to know where I could get the wire diagram to figure which pin is for the brake switch?

 

[mwjscn]

Do you happen to know where I could get the wire diagram to figure which pin is for the brake switch?

Does this help?

 

[Superstang11]

Does this help?

View attachment 89832

That does help for the network connections, which I'll be hooking up so Abs and rcm can communicate via can.

What I'm still not able to figure out is which module in the 2011+ receives the mechanical brake signal and converts it to can bus so the abs can receive it. If it's rcm like tri-bar mentioned I should be in good shape as long as I know what pin receives the brake signal.

I've seen a diagram that might lead to the body control module which might make things more complicated.

Background. I have a 95 mustang with a new pro-m ecu. The pro-m has canbus, but I am unsure if it broadcasts a brake signalom the network or how to check if it does.

Thanks for the help so far everyone. This thread has been great.

 

[Dave_W]

Looks like on the 2011, the parking brake switch goes to pin 1 on the Smart Junction Box (page 3 of the Vehicle Dynamic Systems diagram), which connects to CAN on pins 36 & 37 (page 4 of same).

Ford Workshop Service & Repair Manuals - fordrepair.info - 2011 Mustang 2011 Mustang 042 - vehicle dynamic systems

Ford Workshop Service and Repair Manuals, 2011 Mustang Wiring Diagrams 042 Vehicle Dynamic Systems

iihs.net

 

[Superstang11]

Looks like on the 2011, the parking brake switch goes to pin 1 on the Smart Junction Box (page 3 of the Vehicle Dynamic Systems diagram), which connects to CAN on pins 36 & 37 (page 4 of same).

Ford Workshop Service & Repair Manuals - fordrepair.info - 2011 Mustang 2011 Mustang 042 - vehicle dynamic systems

Ford Workshop Service and Repair Manuals, 2011 Mustang Wiring Diagrams 042 Vehicle Dynamic Systems

iihs.net

Yes, I see that. Although that is the parking brake and I believe what I need is the brake pedal switch or the Brake On/Off (BOO).

 

[Superstang11]

I just came across this and seems like it's showing up in the PCM wiring diagram as the

If that's the case than my best bet is that the pro-m pcm broadcasts the brake signal. If it doesn't I might be SOL. Worth a try maybe.

 

[Fabman]

Jesus I’m gonna have to hire somebody to wire this thing for me….

 

[Dave_W]

I believe what I need is the brake pedal switch or the Brake On/Off (BOO).

Sorry, long day and brain is frazzled. Page 4 has the diagram for the brake switch.

Ford Workshop Service & Repair Manuals - fordrepair.info - 2011 Mustang 2011 Mustang 042 - vehicle dynamic systems

Ford Workshop Service and Repair Manuals, 2011 Mustang Wiring Diagrams 042 Vehicle Dynamic Systems

iihs.net

Note the brake switch is a DPDT switch, with one pole (pins 2 & 3 of brake switch) wired to ground pin 46 (BPS) of the PCM with brakes off, and the other pole (pins 1 & 4 of brake switch) wired to connect "hot at all times" from the Battery Junction Box to pin 13 (BOO) of the PCM, pin 19 (BPP) of the BCM, and pin 40 (BPP) of the Smart Junction Box when brakes are on. The SJB is also shown connecting to CAN in that diagram, which is really just the brake switch connections, so I think that implies it's the SJB that converts the brake switch signal to CAN.

 

[Tri-bar]

There is no use of a brake switch in the 11+ ABS system. On the 05-10 system Ford used a brake switch. The RCM is the brake switch on the 11+ cars. don't mix them up or they won't work The CAM bus is not needed for it work as well. The RCM can bus only talks to the ABS pump that's how it knows your braking. The standard Can Bus can be wired in as a stand alone DO NOT tie it in with the ECU can bus. Any time you flash your ECU, it will fail. At least id did on my car. I never put the resistor in the the ABS can bus so maybe that's why. Truth is it's just not needed. When you bleed your brakes, zip up the street fast enough to engage the ABS, let is cycle and them bleed again, done.

 

[Dane.gonz]

Disclaimer: This info is only for Race cars with standalone ECU setup. Ford's or otherwise.
ABS is installed and working. It turned out to be a lot easier than I expected. First it does work as a standalone system as long as you have a CAN bus. I do have it tied into the CAN bus from the ECU/OBD2. The Restraint Control Module also has it's own CAN bus that talks to the ABS unit. No brake switch to the ECU is used on the 2011-2014 systems. You can upgrade if you have the older systems. All you have to have is the 2011-2014 ABS pump/unit, RCM, ABS plug or harness. Junk yard for the harness and wires. I de-loomed the whole ABS harness and wheel sensors from my car and used them. That was the only factory wiring I used. The PDF's color codes are different on some of the wires than the Fords wiring diagrams just FYI.
The Four wheel speed sensors, a 40amp HAAT power lead, a 30amp HAAT power lead. a 5amp On/Reset switched power lead. Can bus +/- leads, RMC Can bus +/- leads to the ABS unit and two grounds. The RNC only needs ONE 10amp Power lead and the RCM CAN bus and the OBD2 CAN bus to work. All the other wires to the RCM can be removed. Between using the Ford Wiring Diagram and the Boss302R/S PDF's for the ABS harnesses it turned out to be real easy. Just time consuming because of all the splicing to route the wires the way I wanted them, but once its in, it worked.

View attachment 67462

View attachment 67463

Disclaimer: This info is only for Race cars with standalone ECU setup. Ford's or otherwise.
ABS is installed and working. It turned out to be a lot easier than I expected. First it does work as a standalone system as long as you have a CAN bus. I do have it tied into the CAN bus from the ECU/OBD2. The Restraint Control Module also has it's own CAN bus that talks to the ABS unit. No brake switch to the ECU is used on the 2011-2014 systems. You can upgrade if you have the older systems. All you have to have is the 2011-2014 ABS pump/unit, RCM, ABS plug or harness. Junk yard for the harness and wires. I de-loomed the whole ABS harness and wheel sensors from my car and used them. That was the only factory wiring I used. The PDF's color codes are different on some of the wires than the Fords wiring diagrams just FYI.
The Four wheel speed sensors, a 40amp HAAT power lead, a 30amp HAAT power lead. a 5amp On/Reset switched power lead. Can bus +/- leads, RMC Can bus +/- leads to the ABS unit and two grounds. The RNC only needs ONE 10amp Power lead and the RCM CAN bus and the OBD2 CAN bus to work. All the other wires to the RCM can be removed. Between using the Ford Wiring Diagram and the Boss302R/S PDF's for the ABS harnesses it turned out to be real easy. Just time consuming because of all the splicing to route the wires the way I wanted them, but once its in, it worked.

View attachment 67462

View attachment 67463

Could you use the it without the rcm? I’m using a haltech ecu. I’d like to get the CAN systems to communicate.

 

[Tri-bar]

Could you use the it without the rcm? I’m using a haltech ecu. I’d like to get the CAN systems to communicate.

No, you need the RCM on the 11-14 S197 That's what the system uses as a brake switch.

 

[beeman]

Great thread, I sent you a private message (Tri-bar)

 

[BlueGTGS]

Great thread, I sent you a private message (Tri-bar)

On the 05-09 does the ABS require the brake switch? If so which one (upper ot lower). I to have completely removed interior and alot of wiring. Car setup for SCCA CP class. First test day i did abs appeared to be working. During the event the wires for the clutch and brake switches got caught up in the steering shaft and broke the upper brake switch so i just removed all the switches. Next event had brakes locking up. AUTEL scan tool shows no abs faults or errors. When running abs bleed test every thing seams to function correctly. RCM is removed.

 

[Tri-bar]

yes, you need the brake switch, keep both..

 

[BlueGTGS]

yes, you need the brake switch, keep both..

Thanks, I'll but them back in and see what happens.

 

[Amon]

This is awesome, thanks for sharing this! It actually looks a lot simpler than I thought.

I am currently running:

• The control pack and the Gen3 PCM to run a Gen3 Engine in my S197.
• Stock gen1 body harness to use lights, doors, etc. Including fuse box but without the PCM.
• RaceCapture data system that tabs into and reads the can bus and OBD2.

It is a lot of wires right now but I am looking to maintain proper functionality first before cutting into things. I am looking to trim and simplify things once everything is in working order.

My question:
Would it be enough to leave the the stock (gen1) wiring harness intact and simply swap in the Can ports from the control pack (gen3)?
This would assure intact wheel speed sensor wires, grounds and fuses without cutting into the harness more then necessary. By any chance, do you know what kind of Can info the ABS is looking for?
Optionally I could still run the gen1 ECU as a backup for such systems. Not sure though how much it does without the engine harness hooked up.

I have a 2015 mustang gt with the gen 3 swap. I have fallen to the same problem. Please help.

 

[Badger]

Finally made some progress on this. But am limited on testing as I don't have a single hub on the car and am waiting for parts.

I managed to get the MaxiCheck to talk to the RCM and ABS and even the ABS bleed to initiate.

The brake bleed gets initiated and the ABS is actuating but I am not sure if its actually working as I am unable to use the brakes right now. Some input/feedback would be nice here.
This is how it currently sounds without pressing the brakes:

Something clicks, followed by some R2D2 gurgling.

All in all this was some good work but not super hard either. I also had some really good support from @Tri-bar and @Dane.gonz!
Proper wiring documentation and pin outs are essential and it takes double and triple checking on all ends. Attacking RCM and ABS separately helped a lot.
Consistent Ohm measuring is essential as a missing or surplus resistors will cause false negatives on an else-wise functioning system.
This video turned out to be super helpful to get familiar with resistors:

Interesting enough, combining the CAN1 from the 2011 RCM, BOSS302R ABS and the 2018 Gen3 control pack seams to be working. At least its not causing any issues so far and I can read data on Forscan from the ECU and on MaxiCheck from the ABS at the same time.
I did not expect this to work, but I am treating lightly. Time will tell.

Edit: Just did a basic test and put a wheel speed read out onto the AIM dash with all systems together on CAN1. The data is garbage as the sensors are not hooked up, but the ABS is talking to the AIM PDM32 at the same time as the Ford Control Pack.