1996 Ford Aerostar Owner's Manual - Page 311

driving to complete the check" of the OBD II system. As soon as all of the OBD II system checks are successfully completed, the OBD II system is set to the ready condition. The amount of driving required to reach the ready condition varies with individual driving patterns. To complete this requirement in the minimum amount of time, refer to the OBD II Drive Cycle defined below. If the vehicle owner cannot or does not want to do the additional driving required by law, a service center can perform this drive cycle as it would any other type of repair work. OBD II Drive Cycle The following steps must be run in the order shown. If any steps are interrupted, repeat the preceding step. Any safe driving mode is acceptable between steps. Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws. NOTE: When instructions read "in drive," use the standard Overdrive gear. It is not necessary to turn Overdrive off with the OVERDRIVE OFF button. For more information on Overdrive, refer to the Automatic Overdrive Transmission section of the Driving Your Aerostar chapter. The engine must be warmed up and at operating temperature before proceeding with the drive modes of the following OBD II Drive Cycle. 1. 2. 3. Start the engine. Drive or idle (in neutral) the vehicle for 4 minutes. Idle the vehicle in drive for 40 seconds. Accelerate the vehicle to 45 mph (70 km/h) at 1/4 to 1/2 throttle for 10 seconds. 333