Permanently disabling auto start/stop
Mudding
Joined: Sep 2013
Posts: 135
Likes: 78
From: Southern California
I remember in one of the Jags that there was a 3 or 4 wire plug that connects to a module next to the fuse panel. This wire supplies power to the start/stop system.
Unplugging it throws an error when the car is started. Something like "start/stop not available" but that clears and no other systems are impacted.
No idea if the Defender has a similar set-up but it would be in the good book if it does. Just have to find it.
https://landroverforums.com/forum/20...0-p400-109129/
Unplugging it throws an error when the car is started. Something like "start/stop not available" but that clears and no other systems are impacted.
No idea if the Defender has a similar set-up but it would be in the good book if it does. Just have to find it.
https://landroverforums.com/forum/20...0-p400-109129/
Three Wheeling
Joined: May 2021
Posts: 57
Likes: 21
I completely agree but sometimes I let my wife or my father borrow my vehicle. While I appreciate Start/Stop systems for the environmental and MPG benefits, my Defender as well as a few others have completely shut down at stop lights. It led to a small fender bender when an impatient driver attempted to speed past my wife as she was restarting the vehicle. It would be good piece of mind to just have it disabled. This is a great tip.
Rock Crawling
Joined: Dec 2012
Posts: 267
Likes: 241
From: AR
Interesting finding this morning... After unplugging the BMS wire from my battery ground terminal, all ran well with startup, no faults or errors noted, no differences noted with operation and no auto-start/stop engaged. In fact a little symbol shows up on dash when it would normally engage the system with a line through the Auto Start/stop symbol and engine keeps running. Planned to continue running this "BMS Unplug experiment" and report back over time with any negative side effects..... BUT within a few minutes noted the steering wheel not heating up, even though I had turned it on when I started the engine and the LED on the steering wheel was on. Turned it off and back on, and nothing. So pulled over, plugged the BMS wire back in and steering wheel heated up. Heated seats did not seem to be affected. Temps only in high 40's this morning, so nothing extreme.
So this is enough of a reason (at least in the winter) for me to leave the wire plugged in and just manually turn off the system.
So this is enough of a reason (at least in the winter) for me to leave the wire plugged in and just manually turn off the system.
Rock Crawling
Joined: Mar 2021
Posts: 407
Likes: 316
From: South Jersey
Interesting finding this morning... After unplugging the BMS wire from my battery ground terminal, all ran well with startup, no faults or errors noted, no differences noted with operation and no auto-start/stop engaged. In fact a little symbol shows up on dash when it would normally engage the system with a line through the Auto Start/stop symbol and engine keeps running. Planned to continue running this "BMS Unplug experiment" and report back over time with any negative side effects..... BUT within a few minutes noted the steering wheel not heating up, even though I had turned it on when I started the engine and the LED on the steering wheel was on. Turned it off and back on, and nothing. So pulled over, plugged the BMS wire back in and steering wheel heated up. Heated seats did not seem to be affected. Temps only in high 40's this morning, so nothing extreme.
So this is enough of a reason (at least in the winter) for me to leave the wire plugged in and just manually turn off the system.
So this is enough of a reason (at least in the winter) for me to leave the wire plugged in and just manually turn off the system.
Mudding
Joined: Sep 2021
Posts: 150
Likes: 147
Unrelated or seems to be. Again, two years unplugged. Heated steering wheel works no problems, the led is on... Etc. Maybe the difference in the configs and options but my wife's RRS 2020 is the same. Heated SW no problems +led.
RRS P525 and the Defender is a 110-X
RRS P525 and the Defender is a 110-X
