How do you reset the ecm in a 1996 Isuzu Rodeo?

To reset the ECM (Engine Control Module) in a 1996 Isuzu Rodeo, first disconnect the negative battery terminal and leave it disconnected for about 15 minutes. This allows the ECM to clear its memory. After that, reconnect the negative battery terminal and start the vehicle, which will allow the ECM to reinitialize. You may also want to drive the vehicle for a short period to help the ECM relearn optimal settings.