BTW in the AUS Spec SJ NA 2.5 Forester the Auto Start-Stop is disabled when a trailer is connected 
Permanently disable Auto Stop/Start ► technical discussions ONLY (merged thread)
ianbne
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The recently posted video says that the jumper hack works on the Crosstrek. It's easily reversable when needed. Somebody please try it on a Forester!
That Crosstrek video must be from Australia or Europe as the speedometer is in kilometers. Fortunately Auto Stop/Start has not come to the US Crosstrek yet (except for maybe the discontinued hybrid). Good reason to buy a 2019 Crosstrek if your on the fence between 2019 Forester and Crosstrek.
Obviously I can't recommend anyone do this. Although I'm sure the start/stop feature could be easily defeated by popping out the on/off switch and jumpering the wires together, so the switch would always be in start/stop off mode.
This is the same as with some owners of trucks that now come with start/stop. They've found jumpering some pins on the traliering harness defeats the start/stop feature.
This is the same as with some owners of trucks that now come with start/stop. They've found jumpering some pins on the traliering harness defeats the start/stop feature.
There is a stop engine workaround. If you have a factory tow bar fitted, buy a trailer electrical plug & make a connection in the pins which sends a signal to the computer to say you have a trailer connected. This turns off the stop start system while the plug remains in the socket. I don't know what pins to connect, just google it. Good luck or speak to an Auto electrician.
Brake pedal switch.
It seems to me that there would be a normally open contact on the brake pedal which only works when you push it all the way down. If we are lucky it only controls the auto start stop. And would easily be defeatable. If the switch also controls things such as brake lights then we will have problems.
The way it works, we need to press the break pedal all the way down And that tells it to shut the engine off. So we need to investigate this area of the car.
Anyone have the maintenance manual?
Oh yeah by the way I’m an electrician. :grin2:
It seems to me that there would be a normally open contact on the brake pedal which only works when you push it all the way down. If we are lucky it only controls the auto start stop. And would easily be defeatable. If the switch also controls things such as brake lights then we will have problems.
The way it works, we need to press the break pedal all the way down And that tells it to shut the engine off. So we need to investigate this area of the car.
Anyone have the maintenance manual?
Oh yeah by the way I’m an electrician. :grin2:
Does anybody have access to a Subaru wiring diagram, or an electrical description of the start/stop system? It would be nice to know what the switch does and what different conditions need to happen to turn the system off. Is the switch normally closed, normally open, does it momentarily open or close a circuit? Is it a ground or an open that turns the system off or on?
The switch itself doesn't feel or appear to be a conventional off/on configuration. It doesn't do anything until it is depressed all the way, but it doesn't "click" either.
I've tried holding the switch depressed while starting & stopping the engine, and that will not turn the feature off or on.
We have the "feature" on our F150, and a little wedge in the depressed switch will defeat the start/stop.
The switch itself doesn't feel or appear to be a conventional off/on configuration. It doesn't do anything until it is depressed all the way, but it doesn't "click" either.
I've tried holding the switch depressed while starting & stopping the engine, and that will not turn the feature off or on.
We have the "feature" on our F150, and a little wedge in the depressed switch will defeat the start/stop.
Would there be any unintended consequences of using this approach? I thought I read somewhere that when the 2019 is electrically hooked up to a trailer connection, torque vectoring and other handling/transmission set points and responses are adjusted. Would be worth an inquiry to Subaru to confirm.
There have so far been two posts here and on a related thread that describe what sound like likely mods to address this situation:
We are looking for detail from somebody who has successfully implemented either of these. Please help if you did it.
- Wire a jumper across the switch.
- Mod something on the trailer hitch connector.
We are looking for detail from somebody who has successfully implemented either of these. Please help if you did it.
I was reading over the manual about the conditions that exist that prevent AS/S from activating.
One of them is if the power rear gate is disabled. Is there a way to place it in manual mode?
Edit: Also, when the vent is on front defroster, it disables the Start/Stop. Noticed it today on my way home.
One of them is if the power rear gate is disabled. Is there a way to place it in manual mode?
Edit: Also, when the vent is on front defroster, it disables the Start/Stop. Noticed it today on my way home.
I just looked at the back of my Forester and the plug for the trailer connection is in place. Here are two pictures of it. Seems like it would only need a plug with the correct wires shorted. A wiring harness that is available at about 40$ is all that it would take to try !
Attachments
Yes. What are the correct wires to short??? Can anybody help?
It wouldn't even need a compatible plug. Just a wire connected into the existing wiring. Not quite so pretty, but who cares?
Go for it!
Subaru U.S. Media Center
This is
HTML:
https://www.autoblog.com/2018/03/28/2019-subaru-forester-lots-of-little-changes/
Open questions are:
* Do the 2019's sold in NA or elsewhere actually have this feature? I could not find it in an e-search of the Owners Manual PDF
* If the 2019's sold in NA or elsewhere do have this feature, does "fooling the system" to think there is a tow attached to disable "start/stop" trigger Trailer Stability Assist?
*If it does trigger it, what are the consequences, if any, if you are not actually towing and you keep this feature always engaged?
These vehicle systems are interconnected to achieve an overall design intent. Before we recommend "the fix' to permanently disable start/stop, let's make sure we don't solve one problem and create another.
This is interesting. Check out some of the links this site provides too
https://www.smartstopstart.com/general-stop-start-info.html
Sent from my iPhone using Tapatalk
https://www.smartstopstart.com/general-stop-start-info.html
Sent from my iPhone using Tapatalk
Thanks @DockingPilot ! The Argonne National Laboratory Article was very interesting. I copied the link to that article below. See Section 6.2 and the following table (pages 18-19). Looks like more than 10 cycles per day could have a adverse impact. All the reason more to find a viable workaround
https://publications.anl.gov/anlpubs/2015/05/115925.pdf
https://publications.anl.gov/anlpubs/2015/05/115925.pdf
During my drive test, it didn't seem as annoying as I though. In any case, my understanding is that if the vehicle "thinks" it has a trailer attached it will not engage, but couldn't find the video where it was explained.
If you want to take the risk, here is a more invasive approach:
If you want to take the risk, here is a more invasive approach:
Here is a company that makes an auto start/stop eliminator. I checked & they don't have one for the Forester. But if enough of us inquiry about the product they probably could be convinced to produce one. Hope it's OK if I show this company - if not please delete this post.
www.autostopeliminator.com
have fun, dave
www.autostopeliminator.com
have fun, dave
It’s fine to include links to bargains or good sources, as long as you don't have any financial connection to them. We encourage it!
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