resetting ECU

EaglEye · Messages: 845 Registration: 11.17.2003

Ive heard you can reset the ECU by disconecting the battery over night. Is there a faster way of doing this? i read that also it can be wiped by disconecting the battery while the ignition turned on. Woudl this be quicker and not damage it? i want to do this as i have no code reader and want to reset it incase there was anything the ecu was doing to limit anything it shouldnt be. Then ill be starting from a level. thanks

method · Messages: 6 Registration: 08.18.2002

Cant read em like that cosits the OBD version ;/

Solokron · Messages: 110 Registration: 06.18.2002

Disconnect the battery Connect the two battety leads together (NOTE - THE LEADS NOT THE BATTERY!!!)with a jump lead or piece of wire. Turn ignition key to on & leave for 15 minutes. Turn ignition off. Reconnect battery.

hamanncheese · Messages: 55 Registration: 01.26.2003

it may need to re learn its values after batt disconect so you may have eratic idle i will tell you how if so, its been posted before

bmwpower · Messages: 3,806 Registration: 08.06.2002

usually removing the fuse for the ECM for 1 hour will reset the adaptation.

drivingmachine · Messages: 133 Registration: 11.30.2002

Hi Does re-setting cause any problems, and will it re-set warning lights? We have acquired a V40 1.8 petrol and the airbag light is on, occasionally the immobiliser light also comes on but does not seem to affect the running etc.

Larry F. · Messages: 255 Registration: 10.22.2003

It will initially clear warning lights but if the underlying fault still exists tey will illuminate again

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resetting ECU