ECM reset question ?

[stevek201]

I replaced my CCV system. while doing that I had to take the throttle body off. In the Bentley Manual it says when you put the throttle body back on you have to use the BMW scan tool to reset ECM adaptation values. I did not disconnect the plug on the throttle body just moved it out of the way.I don't know why I would have to reset it? There would not be any power going to it with the car shut off while I worked on it. My scan tool for codes does not have a reset for ECM? The car runs fine except for a little less gas mileage on the computer. 1-2 miles less per gallon but, it's winter here
Thanks ahead of time, Steve
2003 530I

[Bmw540san]

you're putting new one in or if you turn the ignition on with current one disconnected, that's when you need the scan tool. This is just a guess, I'm not 100% on this.



1998 BMW 540i 6 speed
Arctic silver, M sport suspension (euro delivery), prod. date 05/98, non VANOS
Staggered 18" style 32 OEM wheels
3.15 open differential
Remus exhaust
AFE CAI with improved heat shield
Z3 shifter
VDO oil pressure and temperature gauges in place of headlight/fog switches
Powder coated valve covers-satin black
CDV delete
Debadged
AEA DRL module (aftermarket daytime running lights)

1997 BMW 528iA
Alpine white, premium package, prod. date 04/97, single VANOS
Staggered 17" style 32 OEM wheels
Debadged
AEA DRL module
Custom made sun blinds for rear seating area

2000 Nissan Frontier Desert Runner, AKA "The Work Horse"

Garage aids:
Direct Lift Pro Park 8
Campbell Hausfeld 28 gallon oil lubricated air compressor
Newair ACP-1400H portable air conditioner and heater
Auto Enginuity scan tool with BMW enhanced option
Actron 9135 scan tool-for quick readouts

[Miniron]

No, you don't have to reset the adaptions.
That's only required if you fit a new throttle body. The adaptions mentioned are to do with manufacturing tolerances when a new throttle body is fitted. All throttle bodies are not equal. The engine ECU/DME has to learn the new throttle body tolerances.
You need BMW software such as INPA to reset the adaptions.

RonR
99 528iT M52TU

[stevek201]

Thanks to both of you,

Steve