Oxygen Sensor/Air Fuel Ratio Sensor Drive Cycle 9

Fig 1: Drive Cycle Pattern 9

Preconditions The monitor will not run unless:
- 2 minutes or more have elapsed since the engine was started.
- The Engine Coolant Temperature (ECT) is 75°C (167°F) or more.
- Cumulative driving time at a vehicle speed of 30 mph (48 km/h) or more exceeds 6 minutes.
- Air-fuel ratio feedback control is performed.
Drive Pattern
1. Connect the OBD II scan tool to the DLC3 to check monitor status and preconditions (refer to step "C").
2. Turn the ignition switch ON.
3. Turn the tester or scan tool ON.
4. Clear the DTCs.
5. Start the engine and allow it to idle for 2 minutes or more.
6. Drive the vehicle at 40 to 70 mph (64 to 112 km/h) for at least 150 seconds.
7. Stop the vehicle and allow the engine to idle for 10 seconds or more.
8. Drive the vehicle at 30 to 40 mph (48 to 64 km/h) for at least 40 seconds.
9. Stop the vehicle and allow the engine to idle for 10 seconds or more.
10. Perform steps (8) and (9) 6 times in one driving cycle.
11. Change the transmission to 2nd gear.
12. Accelerate the vehicle to 30 mph (48 km/h) or more by depressing the accelerator pedal for at least 10 seconds.
13. Soon after performing step (12) above, release the accelerator pedal for at least 10 seconds without depressing the brake pedal, in order to execute fuel-cut control.
14. Allow the vehicle to decelerate until the vehicle speed declines to less than 6 mph (10 km/h).
15. Repeat steps from (12) through (14) above at least 3 times in one driving cycle.
Monitor Status
1. Check the Readiness Monitor Status displayed on the tester or scan tool.
2. If the status does not switch to COMPL (complete), make sure that the preconditions have been met, and then perform steps from (5) through (15) in Drive Pattern above.