I have a 1994 bmw 540i i just recently replaced the throttle postion sensor on it . i need to know how to reset the main computer and for how long

this is the throttle sensor the air intake feed come into this, its different on some models, part number is on the unit match part number with replacement.

code p 0100 refers to mass air flow (MAF) sensor /volume air flow (VAF) sensor--circuit malfunction=== causes --wiring ---MAF/VAF sensor ---ECM
code p1637 refers to throttle valve position control---control deviation===causes---wiring ---
Throttle valve position control unit
take it to an accredited service shop with experience on your vehicle and discuss which would be the most likely unit to be faulty or replace the lot if you have cash to splash

Hi this will be a NO you cannot reset it, the crash alarm geber is a relay, my advice would be just to replace the relay as they are relatively cheap on ebay, you haven't explained why you think its the geber that needs a reset? what is actually wrong with your car

I suspect the control box is faulty,because it is the one that helps display faulty msgs

if you did the job mechanically yourself, then erasing the code needs done by someone with that type of equipment..usually the parts store or dealer..

On this website you find fuse box diagram and description for BMW 5 series (540i)

BMW 540i E34 1991 1994 fuse box diagram Auto Genius

it sounds like the front pump may need to be replaced

TPS located on lower end of throttle shaft. Two bolts holding it in place - three wire connector attached to top.

Try asking here for free 

www.ukbookshelf.co.uk

If it is available  then this place will definitely help...especially on these  older BMW radios

You must check to see if you have power at the fuel pump relay which is probable in a fuse box under the hood.