P0400

Wiring Diagram:

CIRCUIT DESCRIPTION
Refer to EGR System Operation.

Detecting Condition / Possible Cause:

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.

Test Result Cofirmation Flow Table (Steps 1 - 2):

1. Turn ignition switch OFF
Clear DTC with ignition switch ON, check vehicle and environmental condition for:
- Indication of fuel level meter in combination meter: 1/4 or more
- Altitude (barometric pressure): 2400 m, 8000 ft or less (560 mmHg, 75 kPa or more)
- Ambient temp.: -10 °C, 14 °F or higher
- Intake airtemp.: 70 °C, 122 °F or lower

2. Start engine and warm it up to normal operating temperature (70 - 110 °C, 158 - 230 °F) and run it at idle for 5 min.
3. Increase vehicle speed to 50 - 55 mph, 80 - 88 kph in 5th gear or in "D" range.
4. Hold throttle valve at that opening position for 2 min. or longer.
5. Increase engine speed to 4000 r/min. in 3rd gear or in "2" range.
6. Release accelerator pedal and with engine brake applied, keep vehicle coasting (fuel cut condition) till engine speed reaches 1500 r/min.
7. Stop vehicle (don't turn ignition switch OFF) and confirm test results according to following "Test Result Confirmation Flow Table."

Inspection (Steps 1 - 7):