Disconnecting the battery ???

saxo1980 · 20th April 2018, 22:57

Hi all i just wanted to no what people think about disconnecting the battery, will it
Actually Do Anything?

When i look at posts from people say do the above etc but what dose it actually do to the car as the BCU would not reset the ECU will not reset so why do ppl say do it ?

only an t4 will re set anything so its got me beat why people say it strange one i guess or is it me been thick as normal

i just love to no why people say this cos i scratch my head at times over it

cos if it reset the ecu then the car would not start with out an t4 >

marinabrian · 20th April 2018, 23:24

Quote:

Originally Posted by saxo1980

Hi all i just wanted to no what people think about disconnecting the battery, will it
Actually Do Anything?

When i look at posts from people say do the above etc but what dose it actually do to the car as the BCU would not reset the ECU will not reset so why do ppl say do it ?

only an t4 will re set anything so its got me beat why people say it strange one i guess or is it me been thick as normal

i just love to no why people say this cos i scratch my head at times over it

cos if it reset the ecu then the car would not start with out an t4 >

The answer is naff all

It's akin to "have you tried switching it off and on again"

The only two real exceptions are if a message centre IPK mileage display remains lit with the key removed, and to restart the automatic transmission ECU.

Brian

saxo1980 · 20th April 2018, 23:33

Thanks so i guess am rite Only an t4 will reset anything really then so it like p....... in the wind when someone says take your bty off for 30 mins

macafee2 · 21st April 2018, 07:20

I think there are different ways to interpret sao1980's question.
my reply would be "does the radio code get lost and need re-entering?. When working in the vicinity of airbags such as replacing steering wheel, aftyr the batter has been disconnected for 30 or so minutes does it make it safer due to no risk or reduced risk of air bag deployment?"

Brian's answer is quite different to mine

this is the question asked Hi all i just wanted to no what people think about disconnecting the battery, will it
Actually Do Anything?

macafee2

bl52krz · 21st April 2018, 15:15

I am surprised at Brian. Of course it does something. It cuts all electric from your electrics so they don’t work.

lady zed · 21st April 2018, 15:37

It stops your clock. Then you can never find a pen for ages to reset it. In my Wedgwood I also have to key in the radio code again too. Minor irritations that are worth it if the car will be sitting for a while.

75driver · 21st April 2018, 16:05

Quote:

Originally Posted by lady zed

It stops your clock. Then you can never find a pen for ages to reset it. In my Wedgwood I also have to key in the radio code again too. Minor irritations that are worth it if the car will be sitting for a while.

Anna, you can follow procedures here, if you don’t want to have to enter your code again.
How To Disable Your Radio Security Code
https://r.tapatalk.com/shareLink?sha...6&share_type=t
I don’t think anyone is going to want to steal my radio anymore...😬

Sent from my iPad using Tapatalk

HarryM1BYT · 21st April 2018, 16:18

A battery disconnect has been known to sometimes fix certain odd issues. Like your PC can become confused, some ECU's on the car have been known to become confused. Cycling the power can restore them back to normal operation.

cbr1100xx · 21st April 2018, 16:20

Worked for me , disconnected the battery on my ford yesterday and it cleared the engine light on the dash , so must do something

Andy_with_a_screwdriver · 21st April 2018, 20:24

Quote:

Originally Posted by cbr1100xx

Worked for me , disconnected the battery on my ford yesterday and it cleared the engine light on the dash , so must do something

It does exactly the same on my Vauxhall, engine light on, battery off, battery back on, engine light cleared.

20th April 2018, 22:57	#1
saxo1980 Gets stuck in BMW 118i m sport Join Date: Dec 2014 Location: Home Posts: 524 Thanks: 506 Thanked 174 Times in 77 Posts	Disconnecting the battery ??? Hi all i just wanted to no what people think about disconnecting the battery, will it Actually Do Anything? When i look at posts from people say do the above etc but what dose it actually do to the car as the BCU would not reset the ECU will not reset so why do ppl say do it ? only an t4 will re set anything so its got me beat why people say it strange one i guess or is it me been thick as normal i just love to no why people say this cos i scratch my head at times over it cos if it reset the ecu then the car would not start with out an t4 > Last edited by saxo1980; 20th April 2018 at 23:06..

21st April 2018, 15:15	#5
bl52krz This is my second home Rover 75 cdt club + Rover 2.5 KV6 Conni SE Join Date: May 2008 Location: Birmingham Posts: 11,394 Thanks: 6,587 Thanked 2,262 Times in 1,729 Posts	I am surprised at Brian. Of course it does something. It cuts all electric from your electrics so they don’t work. __________________ Great Barr, Birmingham.

21st April 2018, 15:37	#6
lady zed This is my second home Rover 75 Saloon Join Date: Nov 2006 Location: On the edge Posts: 6,659 Thanks: 1,354 Thanked 1,210 Times in 716 Posts	It stops your clock. Then you can never find a pen for ages to reset it. In my Wedgwood I also have to key in the radio code again too. Minor irritations that are worth it if the car will be sitting for a while. __________________ it's all about the first person you want to tell good news to

21st April 2018, 16:18	#8
HarryM1BYT This is my second home 75 Contemporary SE Mk II 2004 Man. Sal. CDTi 135ps, FBH on red diesel, WinCE6 DD Join Date: May 2010 Location: Leeds Posts: 17,273 Thanks: 2,160 Thanked 2,061 Times in 1,586 Posts	A battery disconnect has been known to sometimes fix certain odd issues. Like your PC can become confused, some ECU's on the car have been known to become confused. Cycling the power can restore them back to normal operation. __________________ Harry How To's and items I offer for free, or just to cover the cost of my expenses... http://www.the75andztclub.co.uk/foru...40#post1764540 Fix a poor handbrake; DIY ABS diagnostic unit; Loan of the spanner needed to change the CDT belts; free OBD diagnostics +MAF; Correct Bosch MAF cheap; DVB-T install in an ex-hi-line system; DD install with a HK amp; FBH servicing. I've taken a vow of poverty. To annoy me, send money.

21st April 2018, 16:20	#9
cbr1100xx Gets stuck in VW touareg Join Date: Mar 2015 Location: dunsop bridge Posts: 870 Thanks: 225 Thanked 414 Times in 235 Posts	Worked for me , disconnected the battery on my ford yesterday and it cleared the engine light on the dash , so must do something __________________ WE WERE BOTH BORN ON THE 4th of JULY CAR DIED 15/11/2022---I'M STILL GOING (JUST)

20th April 2018, 23:33	#3
saxo1980 Gets stuck in BMW 118i m sport Join Date: Dec 2014 Location: Home Posts: 524 Thanks: 506 Thanked 174 Times in 77 Posts	Thanks so i guess am rite Only an t4 will reset anything really then so it like p....... in the wind when someone says take your bty off for 30 mins

21st April 2018, 07:20	#4
macafee2 This is my second home Rover 75 Saloon & Tourer Join Date: Sep 2012 Location: Lincoln Posts: 14,929 Thanks: 1,630 Thanked 3,032 Times in 2,181 Posts	I think there are different ways to interpret sao1980's question. my reply would be "does the radio code get lost and need re-entering?. When working in the vicinity of airbags such as replacing steering wheel, aftyr the batter has been disconnected for 30 or so minutes does it make it safer due to no risk or reduced risk of air bag deployment?" Brian's answer is quite different to mine this is the question asked Hi all i just wanted to no what people think about disconnecting the battery, will it Actually Do Anything? macafee2