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  #1  
Old 02-19-2015, 09:35 PM
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Quadra Track Operation

I have a 2014 Grand Cherokee with Quadra Lift with automatic park adjustment

And I have noticed the following: All Shifting done with the brake on and car not moving
P -> Access height
Shift to D -> No change
Shift to S -> Aero height.
Shift to P -> Access height
Shift to D -> No change
Shift to S -> Aero height.
Shift to D -> Normal height

Seems like the vehicle would change as soon as you go in D to be ready to drive. Seems like you are able to drive at low speed in access mode, this is kind of bad as when you go over speed bumps in parking lots the vehicle bottoms out. I used to have a Range Rover and it would change as soon as you moved the shifter.

So I am wondering if there is a problem with the vehicle or a bug exist in the firmware that allows the ride height.

Any info would be appreciated.

Xelatan

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  #2  
Old 02-19-2015, 09:52 PM
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Re: Quadra Lift Operation

Quote:
Originally Posted by xelatan View Post
I have a 2014 Grand Cherokee with Quadra Lift with automatic park adjustment

And I have noticed the following: All Shifting done with the brake on and car not moving
P -> Access height
Shift to D -> No change
Shift to S -> Aero height.
Shift to P -> Access height
Shift to D -> No change
Shift to S -> Aero height.
Shift to D -> Normal height

Seems like the vehicle would change as soon as you go in D to be ready to drive. Seems like you are able to drive at low speed in access mode, this is kind of bad as when you go over speed bumps in parking lots the vehicle bottoms out. I used to have a Range Rover and it would change as soon as you moved the shifter.

So I am wondering if there is a problem with the vehicle or a bug exist in the firmware that allows the ride height.

Any info would be appreciated.

Xelatan
Your suggestion would be good for future releases. I don't have the auto access mode on mine, but if I put my GC into entry/exit, it stays there until I have put it in drive and hit about 15 mph, so I would assume the auto access is similar.
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Old 02-19-2015, 09:58 PM
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Re: Quadra Lift Operation

Quote:
Originally Posted by xelatan View Post
So I am wondering if there is a problem with the vehicle or a bug exist in the firmware that allows the ride height.
Seems to be operating as one might expect given the documentation in the owners' manual.

You know, one time I saw a VW Beetle with the vanity plate, "FEATURE". Seemed appropriate.
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Old 02-19-2015, 10:03 PM
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Re: Quadra Lift Operation

Quote:
Originally Posted by xelatan View Post
I have a 2014 Grand Cherokee with Quadra Lift with automatic park adjustment

And I have noticed the following: All Shifting done with the brake on and car not moving
P -> Access height
Shift to D -> No change
Shift to S -> Aero height.
Shift to P -> Access height
Shift to D -> No change
Shift to S -> Aero height.
Shift to D -> Normal height

Seems like the vehicle would change as soon as you go in D to be ready to drive. Seems like you are able to drive at low speed in access mode, this is kind of bad as when you go over speed bumps in parking lots the vehicle bottoms out. I used to have a Range Rover and it would change as soon as you moved the shifter.

So I am wondering if there is a problem with the vehicle or a bug exist in the firmware that allows the ride height.

Any info would be appreciated.

Xelatan
Keep in mind, that even at entry/exit level, the Grand Cherokee still has better ground clearance than many cars on the road.


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Old 02-19-2015, 10:59 PM
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Re: Quadra Lift Operation

Quote:
Originally Posted by bill_de View Post
Keep in mind, that even at entry/exit level, the Grand Cherokee still has better ground clearance than many cars on the road.


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It might, but it still goes over the speed bump quite rough.
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Old 02-19-2015, 11:05 PM
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Re: Quadra Lift Operation

Quote:
Originally Posted by Roadkill View Post
Seems to be operating as one might expect given the documentation in the owners' manual.

You know, one time I saw a VW Beetle with the vanity plate, "FEATURE". Seemed appropriate.
I have not found any documentation that describes what it should do when you change the shifter in different modes.

I did see a mention that if you manually put it into Access/entry mode it will change when you start driving. The question is how should it behave when it is in auto mode.

When in auto mode as soon as you shift into P it lowers to access/entry mode. So I would expect the same behavior when you put it in D ( Should go to normal mode.)

I was just wondering if anyone can collaborate my findings when switching the transmission.

Thanks

Xelatan
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Old 02-20-2015, 02:42 AM
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Quote:
Originally Posted by xelatan View Post
I have not found any documentation that describes what it should do when you change the shifter in different modes.
Quoth the manual:
Quote:
Entry/Exit Mode (Lowers the vehicle approximately 1.6 in (40 mm) – This position lowers the vehicle for easier passenger entry and exit as well as lowering the rear of the vehicle for easier loading and unloading of cargo. To enter Entry/Exit Mode, press the “Down” button once from (NRH) while the vehicle speed is below 25 mph (40 km/h). Once the vehicle speed goes below 15 mph (24 km/h) the vehicle height will begin to lower. If the vehicle speed remains between 15 mph (24 km/h) and 25 mph (40 km/h) for greater than 60 seconds, or the vehicle speed exceeds 25 mph (40 km/h) the Entry/Exit Mode change will be cancelled. To exit Entry/Exit Mode, press the “Up” button once while in Entry/Exit Mode or drive the vehicle over 15 mph (24 km/h).

NOTE: Automatic lowering of the vehicle into Entry/ Exit Mode can be enabled through the Uconnect® Touch- Screen Radio. If this feature is enabled, the vehicle will only lower if the shift lever is in "PARK", the terrain switch is in "AUTO", the transfer-case is in "AUTO" and the vehicle level should be either in Normal or Aero Mode. The Vehicle will not automatically lower if the air suspension level is in Off Rd 2 or Off Rd 1. If the vehicle is equipped with Intrusion Theft Module (ITM), the lowering will be suppressed when the ignition is switched Off and the Door is Open to prevent setting the alarm Off.
As for Sport Mode:
Quote:
NOTE: When Sport Mode is enabled, the vehicle’s air suspension system will operate in "Aero" Mode.
As I said, your Jeep appears to be operating as per design. The QL rules are applied with different priorities. Sport mode seems to be the highest priority rule that overrides other behavior. So, your scenario illustrates that the entry/exit mode overrides normal ride height mode, and Sport overrides all other rules I have tried (including overriding/locking out manual operation of the suspension buttons).

If you are dissatisfied with the auto-entry/exit mode feature, then I suggest disabling it and simply mashing the suspension down button when you park instead. Conversely, you can leave it enabled and add mashing the suspension "up" button to your Jeep "preflight checklist".

My pet peeve is that the system does not remember that I always have my ventilated seat set to HI. That's part of my "preflight checklist", along with seatbelt, garage door, hitting the start button in order to unlock the squirrelly electronic shifter that I wish were a traditional shifter that could reliably select gears, enabling SNOW mode on SelecTerrain if it's snowy, etc.

As long as we are wishing for features, I wish I could lock QL into Aero mode and just never have it change until I unlock it. Aero all the time: parked, driving slowly in D, in Sport mode, on the highway, etc.

Quote:
I was just wondering if anyone can collaborate my findings when switching the transmission.
Yes. Mine operates this way, and I believe every other similar Jeep will do the same.
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Old 02-20-2015, 08:02 AM
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Re: Quadra Track Operation

+1 on locking in aero mode
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Old 02-20-2015, 09:23 AM
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Re: Quadra Track Operation

Thank you for that useful information. It s good to know that something is not operating as designed.

Still seems like the normal behavior in Auto mode would be to adjust as the shifting occurs. It just makes sense to me. I put the car in D I'm ready to go. the same way as I put the car in P I'm ready to exit the car.

Is there a place to send Chrysler a note to request an an improvement?
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Old 02-20-2015, 09:30 AM
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Re: Quadra Track Operation

Still if you put the car in S it immediately changes to Aero.

So I would think to be consistent if you shift to D it should intermediately go back to the previous ride height that was selected before the shifter was put in P.

So if I was in Off road 1 it should go back... or back to normal.

Of course this is only the case if you have the Auto mode enabled.


It really seems like Chrysler did not think through the feature.



Xelatan
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Old 02-20-2015, 09:56 AM
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Honestly, I think the way it's designed is fairly consistent, with the exception of Sport mode.

Consider it this way: QL modes are all a function of speed or user selection. Entry/exit is a mode you can enter if you're moving slowly or are parked. It will raise to normal if you go faster. Off road modes also will change to lower levels if you drive fast. QL will enter Aero mode if you drive at highway speeds and annoyingly will return to normal ride height if you slow down.

None of this has anything to do with the transmission mode, but rather is based on the speed or manually input height level. Auto entry/exit when parked is an option, and Sport mode forcing Aero (and locking the user preference out) is the true exception.

I mean, not that I'm ecstatic they designed it this way but I can perceive the general coherence of the design pattern.
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Old 02-20-2015, 10:12 AM
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Re: Quadra Track Operation

I don't agree that its only a speed selection. If that was the case it should always go down to entry/exit if the speed goes down bellow 15mph. :-) But it does not. It also has to do with the position of the transmission.

The logical way it should work in Auto mode is that when you put it in P it goes to exit mode. If you put it back to D it goes back to the selected ride height or S id goes to Aero.

I just don't think they implemented the Automatic entry exit mode very user friendly.

When you adjust it manually, it seems to work decent. It is then speed deterministic, as you pointed out. Again when you manually change the ride height it gets adjusted depending on the speed of the vehicle. You can manually put it in entry mode while in D.

Anyhow. Nice disusing this with you :-)

Do you know the ride hight of the entry/exit mode? It just seems like the vehicle bottoms out when you go over a parking lot speed bump.



Xelatan
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