Instruction manual to change eprom. BMW 3xx E30. This is a simple instruction
manual to change an eprom in the ECU. The location is specified for an E30 ...
Instruction manual to change eprom BMW 3xx E30
This is a simple instruction manual to change an eprom in the ECU. The location is specified for an E30 model between 87' an 91' . The Eprom is locatet in the ECU. The ECU is in the glove-box, under a black plastik coverage. Here are the steps: 1.) Disconnect the minus of your battery. 2.) Open the glove-box
then you see a black plastik coverage above.
3.) Remove the coverage by spinning the two screws in front 4.) Under that you will find the ECU, there are two further screws for 10mm wrench opening, turn it half way out. 5.) Now you can pull the ECU out. 6.) Disconnect the connector and transfer the ECU onto you workbech.
7.) Open the 6 aluminium clips on both sides and the top at the backside
8.) Turn out the screws at the frontside
you need a torx screw-driver, but it works with a normal too.
9.) Open the cover. Look into your ECU
10.)
Remove the white plastik cover arroun the eprom You can see the eprom
11.)
Pull it out carefully with a small screw-driver from both sides.
12.)
Put the new in by watching the little invertet nose (left side on the pic)
13.)
Go the above steps in reverse order to complete your car.
After all when you have started the engine your idle-speed might not correct. No panik, the ECU must lern the new condiions, that will take up to 5 minutes while driving some differnt throttle positions. Driving means on road, not only in neutral gear. Please note: Use Premium fuel, because ignition is much earlier, otherwise your engine could be damage. 95 octane or higher is recomended.
