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  #1  
Old 11-29-2013, 09:21 AM
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Cylinder deactivation question?

I guess I have two questions about it. I've got 900 km's on my new GC and have been noticing that cylinder deactivation is kicking in more now. Is that something that happens less frequent during the early break in period? The other thing that I haven't seen covered much is the mds light. I can't understand how a vehicle with so many options and digital screens wouldn't have a mds notification light? The ram has it and it's pretty much the same system? Would really love to know exactly when mds is active.
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Old 11-29-2013, 05:38 PM
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I'm making some assumptions here, but the vehicle does learn your driving habits and adapts (a la the transmission). I wouldn't be surprised that it's adapting to your driving style and knows it can use MDS more frequently if you're pretty easy on it most of the time... Just a guess though.
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Old 11-29-2013, 11:26 PM
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I would guess the engine is breaking in so producing less friction so less parasitic load on the engine, meaning more mds usage. On my ram I have a setting to turn on the eco light that is in my radio, perhaps the grand cherokee has this?
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Old 11-30-2013, 01:41 AM
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It's more likely that the PCM MDS strategy limits it's use more (or potentially eliminates it for a short while) during the early time on the engine for break-in purposes.
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Old 11-30-2013, 07:31 AM
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Re: Cylinder deactivation question?

On the overland you can program it so you see "Eco" in the info window when there's cylinder deactivation. You have to go settings .
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Old 11-30-2013, 04:11 PM
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Re: Cylinder deactivation question?

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Originally Posted by Sobrut911 View Post
On the overland you can program it so you see "Eco" in the info window when there's cylinder deactivation. You have to go settings .
What year?
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Old 11-30-2013, 04:14 PM
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How do you program the 2014s to show Eco in the display for cylinder deactivation?
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Old 11-30-2013, 04:28 PM
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Re: Cylinder deactivation question?

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How do you program the 2014s to show Eco in the display for cylinder deactivation?
You trade it in for a 2013.


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Old 11-30-2013, 10:11 PM
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Re: Cylinder deactivation question?

I have a 2014 summit and I don't see any setting on uconnect to change for a mds indicator? It seems so strange that this vehicle doesn't have it? If a dodge ram has it why can't a grand cherokee? I love this truck and its not a big deal but odd to say the least.
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Old 12-04-2013, 02:54 PM
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Re: Cylinder deactivation question?

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Originally Posted by SummJeep View Post
I have a 2014 summit and I don't see any setting on uconnect to change for a mds indicator? It seems so strange that this vehicle doesn't have it? If a dodge ram has it why can't a grand cherokee? I love this truck and its not a big deal but odd to say the least.
Older UConnect versions had the selection.
The one mine shipped with had it, but you couldn't select it.
Current 13.38.52 doesn't have it any more.

Barstids.
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