P0451

WIRING DIAGRAM/CIRCUIT DESCRIPTION

Detecting Condition And Trouble Area:

DTC CONFIRMATION PROCEDURE

NOTE:
Check to make sure that following condition is satisfied when using this "DTC CONFIRMATION PROCEDURE".

- Intake air temp.: -8 °C (18 °F) or higher
- Engine coolant temp.: 8 - 110 °C (18 - 230 °F)
- Altitude (barometric pressure) : 2400 m, 8000 ft or less (560 mmHg (75 kPa) or more)
- Fuel level indication on meter cluster: less than 3/4

1. Connect scan tool to DLC with ignition switch OFF
2. Turn ON ignition switch and clear DTC, pending DTC and freeze frame data by using scan tool and start engine.
3. Increase vehicle speed to 55 km/h (35 mph) or more.
4. Keep driving above vehicle speed for about 20 min. (Change of vehicle speed is permitted in this step).
5. Keep driving at 50 - 60 km/h (30 - 40 mph) for about 3 min. (Throttle valve opening is kept constant in this step).
6. Stop vehicle and check if DTC and pending DTC exists by using scan tool. If not, check if evaporative system monitoring test has completed by using scan tool. If not in both of above checks (i.e., no pending DTC and evaporative system monitoring test not completed), check vehicle conditions (environmental) and repeat above step 3) through 6).

Steps 1 - 3:

TROUBLESHOOTING