Crankshaft Position Relearn
WARNING: This page does not describe the selected car, but rather 126 other vehicles, including the 1999 Volvo V70, 1999 Volvo S80, 1999 Volvo S70, 1999 Volvo C70, and 1999 Volkswagen Passat. However, it is still accessible from the selected car via links, so may be relevant.
If power supply to ECM has been interrupted, crankshaft position sensor must be relearned by ECM. Accelerate vehicle to 6000 RPM, then decelerate to 2000 RPM. Repeat 5 times.