MeanPeachMojito
Well-Known Member
- Joined
- Jul 30, 2018
- Threads
- 12
- Messages
- 114
- Reaction score
- 44
- Location
- Buffalo, NY
- Vehicle(s)
- 2014 Subaru Forester, 2019 JLU Sport S
I hope that fixes your problem. In my case, I could never relate the issue triggering at a specific time/action. Being that it happened so many times, my husband and I both would take as many notes as we could each time we fell victim to the alert. One time we thought it was because he was simultaneously breaking, turning and powering down his drivers window to card swipe into a parking lot. But there was never any way to replicate it. Eventually, the dealership mechanic had the Jeep fail completely while he was driving it. Being that he is a mechanic, he was able to note all kinds of things we wouldn't pay attention to. He immediately got it into the shop and hooked it up to the machines, which led them to replacing the PCM.Seeing as there is little in the way of troubleshooting here I thought I would contribute my analysis on this. Being a victim as well, here is what I think happens and the culprit.
Just before it happened to me, I clicked in my seat belt. This sets up for one of the requirements for the start/stop option to engage.
Now, when the start/stop engages, the main battery stops producing power and the aux 12v battery takes over and supplies power to all the accessories and interior/exterior lighting.
Once the brake is released, the system should go back to main battery power. When this problem occurs, a 150amp fuse blows on the fuse bar that connects to the aux battery under the fuse box, causing it never to go back to regular battery power, but remains on the aux battery
This failure causes the dash panel battery light to stay on, because it hasn't switched back from the aux battery
Also, if you watch the aux battery weaken to a slow death, and have an accessory plugged into the glove box USB port, you will notice the accessory will continue to work. In my case it was a phone charger. The charger was charging off of the main battery and not a receptacle that draws from the aux battery.
The dealer said they replaced the 150 amp fuse on the fuse bar and replaced the aux battery because it wouldn't take a charge, further pointing to the aux battery never switching back to main power.
Based on all the indications, the service managers responses, the sequence of occurrences, I think its a failure of the start/stop switching mechanism that causes this problem......now I turn it off as soon as I get in. There are ways to bypass, and there are youtube videos out there to do that, but I'll keep doing this until I think a bypass is better than shutting it off every time I get in.
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