Adaptive cruise control any changes in operation from 2019 to 2022?

[erichonda30]

One thing that is annoying in bumper to bumper traffic is the 3 second stop timeout on my 19 3500 ho.
Seems like a safety issue with truck just releasing brakes after 3 seconds.
Does it still do this on the 2022?
Had a few rental cars lately and a hyundai would hold indefinitely or you just tap gas and would go again.

 

[iflyskyhigh]

One thing that is annoying in bumper to bumper traffic is the 3 second stop timeout on my 19 3500 ho.
Seems like a safety issue with truck just releasing brakes after 3 seconds.
Does it still do this on the 2022?
Had a few rental cars lately and a hyundai would hold indefinitely or you just tap gas and would go again.

That’s interesting.

I don’t have my truck yet so no real experience other than test driving for a day, but didn’t get a chance to try it in bumper to bumper traffic.

We have a 2021 Hyundai Palisade Calligraphy. I can tell you the only other system out there right now better than the Hyundai is the Tesla Auto Pilot.

Point being I’m managing by expectations for the Ram. But I certainly hope it doesn’t start going after 3 seconds. That sounds incredibly dangerous.

I decided to get all the tech on my truck. I figured even if it’s not as good as the Hyundai I’d rather have it than not.

 

[erichonda30]

It beeps and has a notification before it releases but no idea on newer trucks,

 

[Brutal_HO]

That’s interesting.

I don’t have my truck yet so no real experience other than test driving for a day, but didn’t get a chance to try it in bumper to bumper traffic.

We have a 2021 Hyundai Palisade Calligraphy. I can tell you the only other system out there right now better than the Hyundai is the Tesla Auto Pilot.

Point being I’m managing by expectations for the Ram. But I certainly hope it doesn’t start going after 3 seconds. That sounds incredibly dangerous.

I decided to get all the tech on my truck. I figured even if it’s not as good as the Hyundai I’d rather have it than not.

It might release, but FCW would keep you from hitting anything.

Keep in mind, these ae basic ACC systems, I don't think RAM is reading traffic signals yet like some others are already doing. Apparently the code for pedestrian FCW or at least the settings are in the BCM, but not currently used in my 2020. It may be enabled in the 22's.

You should also expect the Lane Assist to be less than impressive. It's not Lane Keep.

 

[Arth]

It might release, but FCW would keep you from hitting anything.

Keep in mind, these ae basic ACC systems, I don't think RAM is reading traffic signals yet like some others are already doing. Apparently the code for pedestrian FCW or at least the settings are in the BCM, but not currently used in my 2020. It may be enabled in the 22's.

You should also expect the Lane Assist to be less than impressive. It's not Lane Keep.

I think it has more to do with the systems that are being used.

On my 2021 Ram 1500 the ACC system could do complete stop and go while my 2021 Ram 2500 can not. Also my 1500 had heads up display that could read traffic signs.

From what I can tell the only difference between the two trucks is an electronic parking brake vs manual? My 21 1500 was an Ecodiesel.

Guessing they haven’t given the capability to the heavy duty trucks yet for whatever reason.

 

[Brutal_HO]

I think it has more to do with the systems that are being used.

On my 2021 Ram 1500 the ACC system could do complete stop and go while my 2021 Ram 2500 can not. Also my 1500 had heads up display that could read traffic signs.

From what I can tell the only difference between the two trucks is an electronic parking brake vs manual? My 21 1500 was an Ecodiesel.

Guessing they haven’t given the capability to the heavy duty trucks yet for whatever reason.

Yea, I should have specified RAM "HD".

The HUD is a 5th gen cab thing. Doubt we'll be seeing that in the HD until the redesign.

The ACC center module in the 5th gen is also more compact than the HD, so surely different.

 

[Jimmy07]

I think it has more to do with the systems that are being used.

On my 2021 Ram 1500 the ACC system could do complete stop and go while my 2021 Ram 2500 can not. Also my 1500 had heads up display that could read traffic signs.

From what I can tell the only difference between the two trucks is an electronic parking brake vs manual? My 21 1500 was an Ecodiesel.

Guessing they haven’t given the capability to the heavy duty trucks yet for whatever reason.

This is exactly it- the HDs don’t have the electronic parking brake in the abs module, so it’s not capable of the ACC with stop and go like the 1500.

 

[iflyskyhigh]

Good info.

Ya, I was a little disappointed when I test drove the 2500 after having driven our Palisade.

Like I said, managing my expectations. And I’d rather have it than not.

 

[oscar]

You should also expect the Lane Assist to be less than impressive. It's not Lane Keep.

The warning and correction sensitivities are adjustable in three levels. The highest level definitely gets your attention.

 

[Brutal_HO]

The warning and correction sensitivities are adjustable in three levels. The highest level definitely gets your attention.

I know how it works.

 

[Brutal_HO]

This is exactly it- the HDs don’t have the electronic parking brake in the abs module, so it’s not capable of the ACC with stop and go like the 1500.

Many owners complain about a soft brake pedal feel on the HD's. That said, I know that speed of pedal application increases the perceived and actual stopping power.

Something I've also noticed is that when ACC is running, using the brake always seems to result in an extremely stiff pedal feel.

Is there something going on there like increased pressure in the hydro assist when ACC is active?

 

[Jimmy07]

Many owners complain about a soft brake pedal feel on the HD's. That said, I know that speed of pedal application increases the perceived and actual stopping power.

Something I've also noticed is that when ACC is running, using the brake always seems to result in an extremely stiff pedal feel.

Is there something going on there like increased pressure in the hydro assist when ACC is active?

Yes, when ACC is active, the DASM requests the abs module to prefill the brakes, so the pads are closer to the rotors for quick response time.

 

[Brutal_HO]

Yes, when ACC is active, the DASM requests the abs module to prefill the brakes, so the pads are closer to the rotors for quick response time.

That explains it. Thanks.

I assume there is slightly more pad wear with it active?

 

[Nd79]

Many owners complain about a soft brake pedal feel on the HD's. That said, I know that speed of pedal application increases the perceived and actual stopping power.

Something I've also noticed is that when ACC is running, using the brake always seems to result in an extremely stiff pedal feel.

Is there something going on there like increased pressure in the hydro assist when ACC is active?

Yes, when ACC is active, the DASM requests the abs module to prefill the brakes, so the pads are closer to the rotors for quick response time.

Interesting.... I wonder if there would be a way in which to truck the software (with something like alfaobd) into having abs prefill the brakes all the time for a stiffer pedal, or if it would be worth the effort.

 

[Jimmy07]

That explains it. Thanks.

I assume there is slightly more pad wear with it active?

I’m not sure if the pads actually make contact during prefill.

Interesting.... I wonder if there would be a way in which to truck the software (with something like alfaobd) into having abs prefill the brakes all the time for a stiffer pedal, or if it would be worth the effort.

Definitely not with anything like AlfaOBD.