P0400

SYSTEM/WIRING DIAGRAM

Detecting Condition / Trouble Area:

DTC DETECTING CONDITION AND TROUBLE AREA

DTC CONFIRMATION PROCEDURE

WARNING:
- When performing a road test, select a place where there is no traffic or possibility of a traffic accident and be very careful during testing to avoid occurrence of an accident.
- Road test should be carried out with 2 persons, a driver and a tester, on a level road.

NOTE: Check to make sure that following conditions are satisfied when using this DTC CONFIRMATION PROCEDURE.
- Intake air temp.: Between -10 °C and 70 °C (14 °F and 158 °F)
- Altitude (barometric pressure): 2400 m, 8000 ft or less (560 mmHg, 75 kPa or more)

1. With ignition switch OFF, connect scan tool.
2. Turn ON ignition switch and clear DTC using scan tool.
3. Start engine and warm up to normal operating temperature.
4. Drive vehicle at 40 mph (60 kph) or more (engine speed; 2000 - 3000 r/min.).
5. Keep above vehicle speed for 10 min. (Throttle valve opening is kept constant in this step.)
6. Stop vehicle.
7. Check if DTC/pending DTC exists using scan tool. If not, check if EGR system monitoring test has completed using scan tool. If not in both of above checks (i.e., no DTC/pending DTC and EGR system monitoring test not completed), check vehicle conditions (environmental) and repeat Steps 3) through 6).

Step 1 - 7:

TROUBLESHOOTING