Brake pedal vibration
- Thread starter StomperSB
- Start date
No improvement after balance, rotate and align.
My caster is at 2.5. The place I took it couldn’t adjust it more than that, but everything else is good.
Had a 4x4 shop look at front and rear track bars, drag link and double check rear rotors and calipers. All good there.
Still have the “ECU configuration mismatch” code that nothing will clear. Still no lights coming on, not even when the pedal grab happens.
Up next trying to reprogram the WCM to clear the ECU code. After that, I’m out of ideas and no shop I’ve asked has seen this issue.
If you go to the initial post, you’ll see the long list of everything we already tried. It has new rotors, calipers, brake pads, and wheel bearings on front and new wheel speed sensors all the way around.
I did read the first post but just because they are new doesn't mean they aren't warped, if they are cheap Chinese they could be. A warped rotor will make your brake pedal pulsate as you apply the brakes. You've eliminated everything else what else could it be.
I've read where people have bought new brake drums and they had to get them turned so they wasn't warped.
Wasn’t being snarky about the long list … was just too lazy to type again.
Multiple people have looked at the new front rotors and the old rear rotors and can find nothing visibly wrong with any of them (no grooves, warping, etc). So, I don’t know.
Techs at the local Jeep dealership are leaning toward an electronics issue with something triggering the ABS. That’s why they suggested reprogramming the WCM to see if it will clear the wireless control TPMS code (since we have done everything else to try to clear it (battery and pulling PCM fuse) and it comes back on every rescan). I’ve used multiple OBD readers, cleared JScan multiple times. Even deleted the app and did a new install.
At some point, I have to stop just tossing money for new parts, but it’s driving me nuts…
The only way to know if they are warped is to have them put on a brake turning machine, you cannot tell by looking at them. It would be cheaper for you to take them off and have them checked then paying the Dealer to do something.
Here's some reading for you.
Here's some reading for you.
I have not. TBH, I was kinda nervous about driving with it off; not that I plan to take any hard or sharp turns if it is.
If the ESC is what's causing it your dash should light up and say ESC with squiggly lines when it's doing it.
If your steering wheel isn't centered when driving straight it can make the ESC do it's thing. When the ESC is doing it you'll feel all 4 brakes doing the ABS thing. The ESC is mainly for in the winter time if your Jeep would start fishtailing supposedly to keep you going straight.
vaffanculo
JK Enthusiast
Thinking now maybe your axle is bent or your frame ..im leaning toward your axle...sorry too hear about this but the axle is an easy shade tree fix
I'm thinking mainly of the roll mitigation portion of the strategy. If it is similar to other OEMs it will aggressively activate a particular brake (or pair) to shift inertia and avoid a roll event. Now, if that is a part of the issue there must be something else wrong as well... First step is to confirm or rule it out.
I’m back. After a lot of troubleshooting finally a resolution!
The issue progressively got worse. To the point ABS and TCS were activating at highway speeds, driving straight. Eventually, an error for erratic steering angle popped up.
One shop said it was a clockspring issue. That when the clockspring extended on turns, the steering angle sensor dropped out, activating the traction control and ABS.
Took it to another shop who said nothing was electronically wrong with any components. The clockspring was fine. The steering sensor was reprogrammed and functioning as it should.
So, now we were tracking the steering angle issue. Even though the angle itself was only slightly off-center, there was a lot going on under it.
Very long story short. I’m running a 4”inch lift with 35s. Two years ago, a “reputable 4x4 shop” upgraded my drag link and track bars from OEM to Teraflex. At the time, they said I needed a new pitman arm. The one on there was the one that came with the Rough Country lift that previous owners installed (for a 3-6” lift).
I was new to Jeep life and zero experience. I trusted them. But they F’ed me by putting a stock pitman arm on.
Also, apparently an adjustable track bar was not correctly set.
That bad angle has been wreaking havoc on steering components. With the steering angle messed up, the TCS and ABS response.
Man, this one was a doozy!
The issue progressively got worse. To the point ABS and TCS were activating at highway speeds, driving straight. Eventually, an error for erratic steering angle popped up.
One shop said it was a clockspring issue. That when the clockspring extended on turns, the steering angle sensor dropped out, activating the traction control and ABS.
Took it to another shop who said nothing was electronically wrong with any components. The clockspring was fine. The steering sensor was reprogrammed and functioning as it should.
So, now we were tracking the steering angle issue. Even though the angle itself was only slightly off-center, there was a lot going on under it.
Very long story short. I’m running a 4”inch lift with 35s. Two years ago, a “reputable 4x4 shop” upgraded my drag link and track bars from OEM to Teraflex. At the time, they said I needed a new pitman arm. The one on there was the one that came with the Rough Country lift that previous owners installed (for a 3-6” lift).
I was new to Jeep life and zero experience. I trusted them. But they F’ed me by putting a stock pitman arm on.
Also, apparently an adjustable track bar was not correctly set.That bad angle has been wreaking havoc on steering components. With the steering angle messed up, the TCS and ABS response.
Man, this one was a doozy!
I’m back. After a lot of troubleshooting finally a resolution!
The issue progressively got worse. To the point ABS and TCS were activating at highway speeds, driving straight. Eventually, an error for erratic steering angle popped up.
One shop said it was a clockspring issue. That when the clockspring extended on turns, the steering angle sensor dropped out, activating the traction control and ABS.
Took it to another shop who said nothing was electronically wrong with any components. The clockspring was fine. The steering sensor was reprogrammed and functioning as it should.
So, now we were tracking the steering angle issue. Even though the angle itself was only slightly off-center, there was a lot going on under it.
Very long story short. I’m running a 4”inch lift with 35s. Two years ago, a “reputable 4x4 shop” upgraded my drag link and track bars from OEM to Teraflex. At the time, they said I needed a new pitman arm. The one on there was the one that came with the Rough Country lift that previous owners installed (for a 3-6” lift).
I was new to Jeep life and zero experience. I trusted them. But they F’ed me by putting a stock pitman arm on.
That bad angle has been wreaking havoc on steering components. With the steering angle messed up, the TCS and ABS response.
Man, this one was a doozy!
Thank you for the update. Glad it is resolved for you.
There's one thing I would do that isn't on your list. I would have the wheels balanced just on the off chance that I was getting a harmonic vibration I could feel in the brake pedal. But, aside from that the ABS element may be spoofed by what is triggering the code.