My Jeep Compass Forum banner

21 - 40 of 69 Posts

·
Registered
Joined
·
398 Posts
Mine has been doing this lately when I use the remote start. I have to shut the vehicle off and restart it for the warning light to go off.
Did it become colder? It happened to me 2-3 times when the car sat overnight below 15F. If it has become colder, it might be that. Most of the time A! indicates charge of the aux battery is low, especially if it goes away after you turn the car off and on. Cold doesn't play well with batteries as they discharge faster, recover slower after a discharge and the engine needs more power to start.

I assume it only happens during remote start because with remote start there is something like a 2-3 sec delay between it's initiation and car starting(since you need to press 2X). And if you look inside the car during remote start, most of the cabin electronics, tail lights and the day time lights turn on with the first press. I think these put a load on the cold aux battery and finally the engine cranking with the second press pull out even more juice from the battery. At the end, once the car turns on and makes a "systems" diagnosis, it misdiagnose the battery as poorly charged (since cold also makes recovery after discharge slower), since it makes this check moments after the engine cranking. To me a poorly implemented diagnosis procedure than an actual issue.
 

·
Registered
Joined
·
166 Posts
Did it become colder? It happened to me 2-3 times when the car sat overnight below 15F. If it has become colder, it might be that. Most of the time A! indicates charge of the aux battery is low, especially if it goes away after you turn the car off and on. Cold doesn't play well with batteries as they discharge faster, recover slower after a discharge and the engine needs more power to start.

I assume it only happens during remote start because with remote start there is something like a 2-3 sec delay between it's initiation and car starting(since you need to press 2X). And if you look inside the car during remote start, most of the cabin electronics, tail lights and the day time lights turn on with the first press. I think these put a load on the cold aux battery and finally the engine cranking with the second press pull out even more juice from the battery. At the end, once the car turns on and makes a "systems" diagnosis, it misdiagnose the battery as poorly charged (since cold also makes recovery after discharge slower), since it makes this check moments after the engine cranking. To me a poorly implemented diagnosis procedure than an actual issue.
It did it yesterday (it was 20 F when I remote started it) but this morning it didn't do it (20 F when I remote started it). And yes it did go away after I stopped/restarted the engine. Piss poor design if you ask me.
 

·
Registered
Joined
·
434 Posts
Mine has been doing this lately when I use the remote start. I have to shut the vehicle off and restart it for the warning light to go off.
Hi Redmaxx,

We're sorry to hear that you are experiencing this concern as well. Please let us know if you decide to take your Jeep to the dealer.

Darlene
Jeep Social Care Specialist
 

·
Registered
Joined
·
37 Posts
My "Start/Stop" feature has completely stopped working. It doesn't bother me too much because this is also my first vehicle that has this feature, however just the fact that something is not working like it's supposed is a little annoying. My plan was just to mention it the next time I'm in the dealership for an oil change.

I have had the issue with the "A" light coming on, but like someone mentioned here, I just turned the car off and back on again and it went away (this is my tech fix for anything...8 out of 10 times it works?)
 

·
Registered
Joined
·
141 Posts
Hi Redmaxx,

We're sorry to hear that you are experiencing this concern as well. Please let us know if you decide to take your Jeep to the dealer.

Darlene
Jeep Social Care Specialist
I'm curious if FCA tested a single system before installing it in their vehicles? Glitches like these SHOULD have been vetted out during the design phase of the cars, and should NEVER be beta tested by customers under the guise of it being a "finished" product.
 

·
Registered
Joined
·
166 Posts
Did it become colder? It happened to me 2-3 times when the car sat overnight below 15F. If it has become colder, it might be that. Most of the time A! indicates charge of the aux battery is low, especially if it goes away after you turn the car off and on. Cold doesn't play well with batteries as they discharge faster, recover slower after a discharge and the engine needs more power to start.

I assume it only happens during remote start because with remote start there is something like a 2-3 sec delay between it's initiation and car starting(since you need to press 2X). And if you look inside the car during remote start, most of the cabin electronics, tail lights and the day time lights turn on with the first press. I think these put a load on the cold aux battery and finally the engine cranking with the second press pull out even more juice from the battery. At the end, once the car turns on and makes a "systems" diagnosis, it misdiagnose the battery as poorly charged (since cold also makes recovery after discharge slower), since it makes this check moments after the engine cranking. To me a poorly implemented diagnosis procedure than an actual issue.
I don't think the cold weather has anything to do with it. It was -4 yesterday and -12 this morning and I didn't have this issue. I am sure I can add it to the list of things I have taken it in for and been told that there ar3e no codes and bring it in next time it does it.
 

·
Registered
Joined
·
1 Posts
I had to take mine in for this issue, after it triggered a check engine light when restarting at a red light. The dealership said it was a bad relay and replaced it. A few days later the malfunction light was right back on. It’s a constant issue that the dealership can not pinpoint to fix. I don’t see an issue with outside temp with mine. It happens when hot and/or cold, though I am in GA and it doesn’t get severely cold here.
 

·
Registered
Joined
·
49 Posts
I had to take mine in for this issue, after it triggered a check engine light when restarting at a red light. The dealership said it was a bad relay and replaced it. A few days later the malfunction light was right back on. It’s a constant issue that the dealership can not pinpoint to fix. I don’t see an issue with outside temp with mine. It happens when hot and/or cold, though I am in GA and it doesn’t get severely cold here.
Same issue with mine, waiting for a battery sensor, we'll see. I also have no remote start or 4wd option since the check engine light came on.
 

·
Registered
Joined
·
10 Posts
@JeepCares: I'm curious as to why you do not offer the auto start-stop on the manual transmission (which is a pretty standard option on manuals in Europe). Could it ever be possible as an after market upgrade?
 

·
Registered
Joined
·
1 Posts
My daughter just bought a 2019 Jeep Compass. The first thing I noticed was the Stop/Start feature which I personally found to be annoying. I am retired from Chrysler's Service division so I wanted some basic understanding of this new system. First if you want to disable the system there is an off/on switch but the problem there is you have to reset it every time you cycle the vehicle stop/start switch. OK how do you disable it permanently, some people disengage the hood ajar switch, but that may create other fault codes and problems. With this system there are 2 batteries in your car, the one we are all used to seeing, the large 12 volt battery that powers everything while the vehicle is running down the road. When you stop and the stop/start system kicks in and shuts the engine down all you electrical systems that are still on, radio, heater fan, dash lights, headlights etc are being powered by the small auxiliary battery. There is a jumper wire that connects the primary battery to the secondary battery. If that jumper wire is disconnected your computer will see that and will not allow the start/stop system to function. The down side to this procedure is that you will get the little warning light on the dash permanently displayed. There are some companies which are making a plug in that will disable the stop/start system but I'm not sure if any have been developed for the 2019 products as of yet. For me I think I will simply get in the habit of turning the system off with the dash button every time I start the car.
 

·
Registered
Joined
·
141 Posts
It's facinating how much people hate systems that actually save them money. I was annoyed when mine quit working. I got rather used to the silence of an engine off at a traffic light. Last fall, I was stuck in some serious traffic due to a fatality on the interstate. It legitimately saved me a lot of fuel not burned sitting and going nowhere. It works, saves money, and is not so gradually becoming standard fare across all cars. I say get used to it, and don't look for ways to cost yourself more at the pump.
 

·
Registered
Joined
·
141 Posts
The START-STOP system does not save fuel. On the contrary. Besides, it destroys the battery and starter!
On the contrary. I've noticed a 1 - 2 mpg improvement in my fuel economy with the system on vs off. I fall into the category of roughly 60% city driving. Given that the system is designed with a heavy duty starter and an auxiliary battery, it does not "destroy" either component. The issues people have been having here have to do with software and sensor problems, not starters and batteries.
 

·
Registered
Joined
·
398 Posts
On the contrary. I've noticed a 1 - 2 mpg improvement in my fuel economy with the system on vs off. I fall into the category of roughly 60% city driving. Given that the system is designed with a heavy duty starter and an auxiliary battery, it does not "destroy" either component. The issues people have been having here have to do with software and sensor problems, not starters and batteries.
Yeah start/stop systems have a different type of starter that can handle frequent crankings without any issues, their life expectancies are not any shorter than a regular starter. Battery is also divided in to two smaller batteries to reduce the load on the battery. Overall, idling a car at a stop while stepping on the brake probably cause more wear to the torque converted, brakes, etc, than it causes to the starter.
 

·
Registered
Joined
·
30 Posts
It's facinating how much people hate systems that actually save them money. I was annoyed when mine quit working. I got rather used to the silence of an engine off at a traffic light. Last fall, I was stuck in some serious traffic due to a fatality on the interstate. It legitimately saved me a lot of fuel not burned sitting and going nowhere. It works, saves money, and is not so gradually becoming standard fare across all cars. I say get used to it, and don't look for ways to cost yourself more at the pump.
It really depends on the type of traffic that people drive in. If someone (like me) spends a lot of time in constant stop-and-go traffic, the stop/start system can be infuriating. I tracked mine about three weeks ago, and the system restarted my car 18 times in a half mile stretch of road in heavy traffic. Most of the shutdowns were for less than two seconds in length, and none exceeded 10 seconds. In that kind of traffic, the constant delay as the engine restarts just feels like severe hesitation and can lead to a very "jerky and surge-y" drive (as my wife put it). FCA should have given us a choice to set a delay on the stop/start system. Sure, there's a button to press, but for many of us this is an everyday thing and it can be very frustrating to have to hit the button every single day.

I'm an EE and solved the problem myself last weekend. I just soldered up a timer circuit that fires a momentary relay (it's slightly more complicated than that, but you get the idea) to trigger the circuit. The rewiring was minimal, but my button now "presses itself" five seconds after the car starts. Itstill works when I want it to, but it defaults to Off rather than on.

And no, before anyone asks, I'm not interested in selling the mod to anyone. I may diagram out the circuit and post photos of it so the more electronically inclined can try it themselves though.
 

·
Registered
Joined
·
141 Posts
It really depends on the type of traffic that people drive in. If someone (like me) spends a lot of time in constant stop-and-go traffic, the stop/start system can be infuriating. I tracked mine about three weeks ago, and the system restarted my car 18 times in a half mile stretch of road in heavy traffic. Most of the shutdowns were for less than two seconds in length, and none exceeded 10 seconds. In that kind of traffic, the constant delay as the engine restarts just feels like severe hesitation and can lead to a very "jerky and surge-y" drive (as my wife put it). FCA should have given us a choice to set a delay on the stop/start system. Sure, there's a button to press, but for many of us this is an everyday thing and it can be very frustrating to have to hit the button every single day.

I'm an EE and solved the problem myself last weekend. I just soldered up a timer circuit that fires a momentary relay (it's slightly more complicated than that, but you get the idea) to trigger the circuit. The rewiring was minimal, but my button now "presses itself" five seconds after the car starts. Itstill works when I want it to, but it defaults to Off rather than on.

And no, before anyone asks, I'm not interested in selling the mod to anyone. I may diagram out the circuit and post photos of it so the more electronically inclined can try it themselves though.
I do plenty of city driving as well. As with any system, you have to adapt to its function. It's not hard to adapt. It means doing the simple task of paying attention to your surroundings. Look ahead a couple of cars. Lift of foot just enough to cause start as the vehicle ahead of you begins to move. No more jerky, surgy driving.
 

·
Registered
Joined
·
30 Posts
I do plenty of city driving as well. As with any system, you have to adapt to its function. It's not hard to adapt. It means doing the simple task of paying attention to your surroundings. Look ahead a couple of cars. Lift of foot just enough to cause start as the vehicle ahead of you begins to move. No more jerky, surgy driving.
I'm an engineer. Good design is intuitive and adapts to the expectations of the user. Not the other way around. Humans are the most important element in any system, and good design puts the user's expectations and needs first. The FCA start/stop system is flawed in that it's overly obtrusive and alters the driving experience in a negative way. There are a million ways they could improve it (disable it in frequent stop/start situations, allow the user to adjust the stop delay, tie it into the collision control system to autostart when leading traffic moves, etc), but the current system is limited and forces the driver to adjust driving behaviors that have been established over a lifetime, and which are still valid in just about every other vehicle on the road. It's a neat engineering trick, but it makes the vehicle less user-friendly in my opinion. The very minor increase in fuel efficiency isn't worth the degraded driving experience.

To each their own though, and it's great that you like the feature. It's not for me, but it's also not a problem for me anymore. I have bent my machine to suit my will, and my own Stop/Start system now defaults to OFF :grin:
 

·
Registered
Joined
·
927 Posts
Wolfy said:
It's facinating how much people hate systems that actually save them money.
There is not the slightest chance for this system to save me so much as a fraction of a penny There is no way shutting down for one second and then firing right back up instantly is saving me any gas, and thats pretty much the only thing it does if I forget to shut the system off when I get in and go.

Wolfy said:
I got rather used to the silence of an engine off at a traffic light.
Got used to the silence, eh? Must have also got used to the obnoxious CHUTHUTHUTHUTHTUHTUHT of restart and the glares of other drivers around you who have to hear your starter crank loudly and watch your headlights and taillights pulsing with the turning of the motor...

I know what part you really like, you enjoy the time when the motor is off at a stop because if its ON at a stop you have to listen to all your quarters in the cup holder chattering around, continuously shaken by the worlds most roughest idling four cylinder =P

The IDEA of ESS is fine. This particular implementation is not. It is garbage. I hope someday you get to ride in a car that does it right, you will see the difference.

Wolfy said:
Last fall, I was stuck in some serious traffic due to a fatality on the interstate. It legitimately saved me a lot of fuel not burned sitting and going nowhere.
One rare example does not justify the shamelessly poor implementation of this particular system. I'm not concerned about a two mile crawl that happens maybe once or twice in the umpteen-hundred-thousand mile lifecycle of driving a given car.


Recursive said:
I'm an EE and solved the problem myself last weekend. I just soldered up a timer circuit that fires a momentary relay (it's slightly more complicated than that, but you get the idea) to trigger the circuit. The rewiring was minimal, but my button now "presses itself" five seconds after the car starts. Itstill works when I want it to, but it defaults to Off rather than on.
Ah man, you beat me to it! Thats what I was going to do before I decided to order up the stuff to try to go the programming route.

I still might go hardware route at some point, because my wife is very displeased with the lack of being able to set a couple of memory positions for the driver's power seat so we can easily switch back and forth.

So, want to expand your module out to also be a seat memory feature as well? =D If you are using something common like arduino I can probably help. I'm not an electrical engineer, but I am a software engineer who dabbles. Just a lack of free time keeps me from my many big ideas to un-fvckify this car...
 
21 - 40 of 69 Posts
Top