1996 Ford Bronco Owner's Manual - Page 339

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 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. 4. 5. 6. Start the engine. Drive or idle (in neutral) the vehicle for 4 minutes. Idle the vehicle in drive (neutral for manual transmission) for 40 seconds. Accelerate the vehicle to 45 mph (72 km/h) at 1/4 to 1/2 throttle for 10 seconds. Drive the vehicle with a steady throttle at 45 mph (72 km/h) for 30 seconds. Idle the vehicle in drive (neutral for manual transmissions) for 40 seconds. Continue to drive the vehicle in city traffic at speeds between 25 and 40 mph (40-64 km/h) for 15 minutes. During the 15 minute drive cycle the following modes must be achieved: a. at least 5 stop and idle modes at 10 seconds each b. acceleration from idles at 1/4 to 1/2 throttle position, and c. choose 3 different speeds to do 1.5 minute steady state throttle drives. 342