Vehicle Speed Sensor (VSS) Adaption
After replacing an Engine Control Module (ECM), Crankshaft Position (CKP) sensor, starter ring gear or motor mount, sensor adaptation must be performed. Run engine until coolant temperature is more than 158°F (70°C). Drive vehicle. With gear selector in position 4, increase engine speed to approximately 2500 RPM, then coast until engine speed is less than 1500 RPM. Change gear selector to position 2. Increase engine speed to approximately 6100 RPM, then coast until engine speed is less than 4100 RPM. Again increase engine speed to approximately 6100 RPM, then coast until engine speed is less than 3000 RPM. Using scan tool, verify VSS adaptation has occurred.