ABS issues Cooler weather?

[LeftCoastOverland]

So the last few mornings I’ve been experiencing ABS / Traction control / hill assist warnings on my dash.

First start of the day, 13 Deg. C. Drove it a bit down the way could hear the tires screech on some right hand turns… so something is up.

After it warms up / second start of the day no more issues.

Bleed the brake system?

 

[Clark Kent]

It's definitely your choice of music. Change that and it will go back to normal

- Is your pedal height and feel the same with hot and cold brakes?
- Can you feel the pedal pulsing when it happens? ABS activation gives a characteristic pedal pulse of several cycles per second.
- Is it only when cold and only for right turns?

Try riding the brake pedal for maybe 10 seconds when you first move off with cold brakes. If getting heat into the brakes and hubs early makes it go away I would suspect something mechanical around a wheel speed sensor, tone ring or a caliper. Perhaps a tired wheel bearing is letting a hub move around enough when it's cold to screw up the wheel speed sensor air gap.

There has been a few reports, me included, where there was a weird ESC intervention if you brake hard while turning. The pedal height drops and you feel a momentary ABS intervention. Is this different?

Regardless, don't mess about with it for too long if your dealer is accessible.

 

[Shopkeep]

Sounds more like the rear differential failures a couple of owners have had, I would be carefully noting every occurrence and contacting your dealer.

Thread '"POWERTRAIN ERROR", truck gone for month+, INEOS uncooperative'
https://www.theineosforum.com/threa...-gone-for-month-ineos-uncooperative.12421011/

Thread 'Rear Locker Failure Update'
https://www.theineosforum.com/threads/rear-locker-failure-update.12420708/

 

[Clark Kent]

Sounds more like the rear differential failures a couple of owners have had, I would be carefully noting every occurrence and contacting your dealer.

Thread '"POWERTRAIN ERROR", truck gone for month+, INEOS uncooperative'
https://www.theineosforum.com/threa...-gone-for-month-ineos-uncooperative.12421011/

Thread 'Rear Locker Failure Update'
https://www.theineosforum.com/threads/rear-locker-failure-update.12420708/

Actually that’s a good point. I’ve assumed @LeftCoastOverland was talking about the front wheels but he doesn’t actually say front or rear. And those dash light warnings weren’t mentioned in the locker failure posts but the general symptoms are there.

 

[LeftCoastOverland]

It's definitely your choice of music. Change that and it will go back to normal

- Is your pedal height and feel the same with hot and cold brakes?
- Can you feel the pedal pulsing when it happens? ABS activation gives a characteristic pedal pulse of several cycles per second.
- Is it only when cold and only for right turns?

Try riding the brake pedal for maybe 10 seconds when you first move off with cold brakes. If getting heat into the brakes and hubs early makes it go away I would suspect something mechanical around a wheel speed sensor, tone ring or a caliper. Perhaps a tired wheel bearing is letting a hub move around enough when it's cold to screw up the wheel speed sensor air gap.

There has been a few reports, me included, where there was a weird ESC intervention if you brake hard while turning. The pedal height drops and you feel a momentary ABS intervention. Is this different?

Regardless, don't mess about with it for too long if your dealer is accessible.

Music Choices aside...

Pedal height hasn't felt different, nor has braking power. But I haven't been giving the pedal a lot of juice lately. Just light driving. Been trying to do my civic duty and conserve fuel, so light on everything can't be stressed enough.
Also, there isn't a signature ABS Chatter when pressing the brake.
The tire screetch only occured 2x at roundabouts - aprox 30 KPH on the right hand, light brake application, and then acceleration after the apex of the turn. tire screech was audible but only for about a second or so.
It doesn't occur on left hand turns, and by the time I was ready to make another right turn - say 3-5 min of driving the anomaly stopped.

I parked at work to return driving at around 1800, after the truck had been basking in the warm sun for the day to no issues for the 15 min drive home.

This morning being wet and soggy at a crisp 14 degrees I decided to pump the brakes aprox 5 times before engaging D. And as I slowly drove out of the parking lot to work (Yes I'm working through the Easter Holiday) I Applied light brake and accelerator for 10-15 seconds to warm up the system as Mr. Kent suggested. Which solved the issue. The entire drive this morning was warning free, and sans screetching tires. I suppose the feeling of the brake pedal by the 3rd or 4th pump took the sponginess out of it, and by the 5th it felt nice and firm.

As mentioned on by Shop - not sure if the locked tire was coming from the front or rear on the right hand turns... but I'm assuming (praying ) it's a brake caliper, and not the rear diff lock...

I'll continue to monitor, and involve my service dept. The truck is honking at me to get the Oil interval reset in 990KM anyways.
Thanks for the thoughts and ideas.