How do I reset the ecu COMPLETELY?

Turkishexpress · 08-30-2008, 04:42 PM

Hi guys,

I currently have the JB2H and the JB3 should be arriving any day now. My car was built in Feb 08 however I took delivery in July 31st. Now, I spoke to one of the Service managers at my local BMW shop. He said that they don't upgrade the ECU's when the cars arrive at their lot so I'm guessing that I have the previous software which can't detect the JB. He also said that BMW is constantly coming up with ways to figure out if there has been any tempering with the ECU. Just to be safe I want to clear out the ecu before I install the JB3 to minimize my chances of getting caught. Apparently I have no say in whether or not my software is updated if I bring the car in for ANY service so I don't want any chance of them detecting any electronic fingerprints from the JB2H... Well is there anyway to completely reset the ecu?

Also, he told me that when they are uploading the new software, if the ecu has been tempered with in the past the DME would crash/burn and as a result void the warranty and cost $2K just to replace

exidisjon · 08-30-2008, 04:48 PM

Not sure on the BMW but most cars ECU resets when you disconnect the battery for certain amount of time.

David1 · 08-31-2008, 10:15 AM

Quote:

Originally Posted by exidisjon

Not sure on the BMW but most cars ECU resets when you disconnect the battery for certain amount of time.

The hidden codes do not reset when you disconnect the battery.

bluescoupe · 08-31-2008, 10:53 AM

a good mechanic with a computer should be able to reset?

bluescoupe · 08-31-2008, 02:41 PM

Quote:

Originally Posted by Turkishexpress

Hi guys,

I currently have the JB2H and the JB3 should be arriving any day now. My car was built in Feb 08 however I took delivery in July 31st. Now, I spoke to one of the Service managers at my local BMW shop. He said that they don't upgrade the ECU's when the cars arrive at their lot so I'm guessing that I have the previous software which can't detect the JB. He also said that BMW is constantly coming up with ways to figure out if there has been any tempering with the ECU. Just to be safe I want to clear out the ecu before I install the JB3 to minimize my chances of getting caught. Apparently I have no say in whether or not my software is updated if I bring the car in for ANY service so I don't want any chance of them detecting any electronic fingerprints from the JB2H... Well is there anyway to completely reset the ecu?

Also, he told me that when they are uploading the new software, if the ecu has been tempered with in the past the DME would crash/burn and as a result void the warranty and cost $2K just to replace

Is this all scare tactics?
OR are mods, like the JB, actually detectable, pre- or post. 29.2?
Sorry for the detailed question!

Turkishexpress · 08-31-2008, 10:26 PM

I don't know thats actually a good question. I was thinking that too but then again these guys are pretty cool and dealers usually like doing warranty work since they get paid. In any case, I need to find a crooked bmw tech

08-30-2008, 04:42 PM	#1
Turkishexpress Gixxer Man 14 Rep 599 Posts Drives: '08 335i E90 / '06 Range HSE Join Date: Aug 2008 Location: Tysons/Sterling, VA iTrader: (2)	How do I reset the ecu COMPLETELY? Hi guys, I currently have the JB2H and the JB3 should be arriving any day now. My car was built in Feb 08 however I took delivery in July 31st. Now, I spoke to one of the Service managers at my local BMW shop. He said that they don't upgrade the ECU's when the cars arrive at their lot so I'm guessing that I have the previous software which can't detect the JB. He also said that BMW is constantly coming up with ways to figure out if there has been any tempering with the ECU. Just to be safe I want to clear out the ecu before I install the JB3 to minimize my chances of getting caught. Apparently I have no say in whether or not my software is updated if I bring the car in for ANY service so I don't want any chance of them detecting any electronic fingerprints from the JB2H... Well is there anyway to completely reset the ecu? Also, he told me that when they are uploading the new software, if the ecu has been tempered with in the past the DME would crash/burn and as a result void the warranty and cost $2K just to replace __________________ Stable: 2008 E90 335i JB3 etc..., 2006 Range Rover HSE, K7 GSX-R 600 Former Stable: 2008 MB C300, 2007 Chevy Avalanche, 2006 Evo IX (544awhp), 2005 Sti, 2003 Evo...
	Appreciate 0 Tweet Quote

08-30-2008, 04:48 PM	#2
exidisjon PuffPuffPass 52 Rep 1,096 Posts Drives: E92 335xi AW/Saddle Join Date: Aug 2008 Location: NJ iTrader: (8)	Not sure on the BMW but most cars ECU resets when you disconnect the battery for certain amount of time. __________________ My right foot weighs more than my left for sure.
	Appreciate 0 Quote

08-31-2008, 10:53 AM	#4
bluescoupe motorhead 58 Rep 465 Posts Drives: 2017 M2 Join Date: Mar 2008 Location: west coast, FL iTrader: (0)	a good mechanic with a computer should be able to reset?
	Appreciate 0 Quote

08-31-2008, 10:26 PM	#6
Turkishexpress Gixxer Man 14 Rep 599 Posts Drives: '08 335i E90 / '06 Range HSE Join Date: Aug 2008 Location: Tysons/Sterling, VA iTrader: (2)	I don't know thats actually a good question. I was thinking that too but then again these guys are pretty cool and dealers usually like doing warranty work since they get paid. In any case, I need to find a crooked bmw tech __________________ Stable: 2008 E90 335i JB3 etc..., 2006 Range Rover HSE, K7 GSX-R 600 Former Stable: 2008 MB C300, 2007 Chevy Avalanche, 2006 Evo IX (544awhp), 2005 Sti, 2003 Evo...
	Appreciate 0 Quote