What does letting the battery die do?

[MHW100]

Does it reset the ecm? Does it have the same effect as disconnecting the battery cable?

 

[Johnbigdog]

Yes it can, and it can set a slew of low voltage d.t.c.s.

 

[MHW100]

Yes it can, and it can set a slew of low voltage d.t.c.s.

So not recommended or is it easy to clear the codes?

 

[Johnbigdog]

So not recommended or is it easy to clear the codes?

Why would you want your battery to go dead? It's not necessarily good for the battery. Just disconnect the cable to clear what you can. Most of the time no malfunction lights will come on due to it.

If your batter went dead, charge it up and let it buck, but i would be concerned why the battery went dead if it was realitivly quick. Like overnight.

 

[MHW100]

Why would you want your battery to go dead? It's not necessarily good for the battery. Just disconnect the cable to clear what you can. Most of the time no malfunction lights will come on due to it.

If your batter went dead, charge it up and let it buck, but i would be concerned why the battery went dead if it was realitivly quick. Like overnight.

My idea was to reset all of the learning e.g. transmission shifts etc .The first 7k or so was driven by someone else.

 

[Johnbigdog]

My idea was to reset all of the learning e.g. transmission shifts etc .The first 7k or so was driven by someone else.

Just disconnect it and allow it to stay disconnected for 5-10 minuets.

 

[Raging Bull]

Does it erase the tune on the car as well ? I would have to load the tune again correct. Because mine was driven by someone else as well for the first 7k I would like it to be my shifts it is learning. However have 11000 on it now as it already learned my shifts or is it on the first owner shifting points. Doesn’t the tune change the shift points anyway ? So does it matter ? it’s learning the new shifts under my foot with the tune anyway ??

 

[Johnbigdog]

Does it erase the tune on the car as well ? I would have to load the tune again correct. Because mine was driven by someone else as well for the first 7k I would like it to be my shifts it is learning. However have 11000 on it now as it already learned my shifts or is it on the first owner shifting points. Doesn’t the tune change the shift points anyway ? So does it matter ? it’s learning the new shifts under my foot with the tune anyway ??

No. It will only clear keep alive memory, not calibration/configuration. Keep alive memory is what It uses to adapt to wear and the driver. It will not clear your tune. If that was the case, no battery could ever go dead or be discinected.

Your car has likely already learned you. Up to you if you want to yank the battery. It won't hurt anything except resetting some stuff in the radio/cluster posibly.

 

[MHW100]

So I disconnected the battery for about 20 min and followed the manual re the trim . Seemed to fix the oddball shift I was experiencing that left the car flat . Feels like it pulls in all gears and rpm now. Maybe placebo but I don't believe so .

 

[SHOdded]

Cautiously optimistic