If you really must know...disconnecting battery does not

Mr Paddle.Shift · 03-18-2004, 01:49 PM

reset the ECU. Ask any experienced tech at any BMW dealer. It's an urban myth. The trick will work with OBD-1 cars and some early '96 models.

Resetting the ECU requires a GT1 to do the proper job.

Nick M3 · 03-18-2004, 01:50 PM

I believe you when you say that fully resetting the ECU is impossible without a BMW tool.

HOWEVER, there are settings that are reset when you kill the power.

zach · 03-18-2004, 01:50 PM

Quote:

Originally Posted by Mr Paddle.Shift

reset the ECU. Ask any experienced tech at any BMW dealer. It's an urban myth. The trick will work with OBD-1 cars and some early '96 models.

Resetting the ECU requires a GT1 to do the proper job.

ops:

TD · 03-18-2004, 01:52 PM

I have never tried it and, as far as I can recall, I never claimed it to be true.

I think it was zcasavant talking about doing it in that one thread at the Fest and I know our Nick also claims it works.

I have no idea.

Mr Paddle.Shift · 03-18-2004, 01:58 PM

Yes, Nick. We discussed about soft and hard resets. For E46, disconnecting battery resets the throttle adaptation values. That's it. ECU will still retain its own adaptation values.

I strongly recommend any of you to ask the dealer to do a FULL ECU reset. Trust me. The car feels different.

Mr Paddle.Shift · 03-18-2004, 02:00 PM

Quote:

Originally Posted by zcasavant

ops:

No hard feelings for not replying on the Fest, pal.

I just feel more comfortable posting here.

Nick M3 · 03-18-2004, 02:01 PM

Quote:

Originally Posted by Mr Paddle.Shift

Yes, Nick. We discussed about soft and hard resets. For E46, disconnecting battery resets the throttle adaptation values. That's it. ECU will still retain its own adaptation values.

I strongly recommend any of you to ask the dealer to do a FULL ECU reset. Trust me. The car feels different.

I agree with you on that, but even a throttle adaptation value reset is useful and makes a noticable difference.

zach · 03-18-2004, 02:02 PM

Quote:

Originally Posted by Nick325xiT 5spd

Quote:

Originally Posted by Mr Paddle.Shift

Yes, Nick. We discussed about soft and hard resets. For E46, disconnecting battery resets the throttle adaptation values. That's it. ECU will still retain its own adaptation values.

I strongly recommend any of you to ask the dealer to do a FULL ECU reset. Trust me. The car feels different.

I agree with you on that, but even a throttle adaptation value reset is useful and makes a noticable difference.

Even on an e36?

Nick M3 · 03-18-2004, 02:03 PM

Quote:

Originally Posted by zcasavant

Quote:

Originally Posted by Nick325xiT 5spd

Quote:

Originally Posted by Mr Paddle.Shift

Yes, Nick. We discussed about soft and hard resets. For E46, disconnecting battery resets the throttle adaptation values. That's it. ECU will still retain its own adaptation values.

I strongly recommend any of you to ask the dealer to do a FULL ECU reset. Trust me. The car feels different.

I agree with you on that, but even a throttle adaptation value reset is useful and makes a noticable difference.

Even on an e36?

The only E36 I ever had was OBD I. It made a marked difference on that car.

03-18-2004, 01:49 PM	#1
Mr Paddle.Shift Track Addict. Join Date: Oct 2003 Location: LA, Calif Posts: 353	If you really must know...disconnecting battery does not reset the ECU. Ask any experienced tech at any BMW dealer. It's an urban myth. The trick will work with OBD-1 cars and some early '96 models. Resetting the ECU requires a GT1 to do the proper job.

03-18-2004, 01:50 PM	#2
Nick M3 Relic Join Date: Oct 2003 Location: Bethesda, MD Posts: 12,458	I believe you when you say that fully resetting the ECU is impossible without a BMW tool. HOWEVER, there are settings that are reset when you kill the power. __________________ 2011 M3 2006 Sierra 2500HD 4WD LBZ/Allison 2004 X5 3.0i 6MT 1995 M3 S50B32 1990 325is 1989 M3 S54B32 Hers: 1989 325iX 1996 911 Turbo

03-18-2004, 01:58 PM	#5
Mr Paddle.Shift Track Addict. Join Date: Oct 2003 Location: LA, Calif Posts: 353	Yes, Nick. We discussed about soft and hard resets. For E46, disconnecting battery resets the throttle adaptation values. That's it. ECU will still retain its own adaptation values. I strongly recommend any of you to ask the dealer to do a FULL ECU reset. Trust me. The car feels different. __________________ Read all about the track events in my blog at vsengineeringtrack.com. *Not a commercial site.

03-18-2004, 01:52 PM	#4
TD Founder emeritus Join Date: Oct 2003 Location: Maryland Posts: 21,007	I have never tried it and, as far as I can recall, I never claimed it to be true. I think it was zcasavant talking about doing it in that one thread at the Fest and I know our Nick also claims it works. I have no idea.