With CONSULT-II

Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
Check "COOLAN TEMP/S" in "DATA MONITOR" mode with CONSULT-II.
Confirm "COOLAN TEMP/S" value is within the range listed below.
1. COOLAN TEMP/S: Less than 40°C (104°F)
If the value is out of range, park the vehicle in a cool place and allow the engine temperature to stabilize. Do not attempt to lower the engine coolant temperature with a fan or means other than ambient air. Doing so may produce an inaccurate diagnostic result.

Fig 1: Displaying Data Monitor Screen
Courtesy of NISSAN MOTOR CO., U.S.A.
Start engine and let it idle monitoring "COOLAN TEMP/S" value. When the "COOLAN TEMP/S" value reaches 70°C (158°F), immediately go to the next step.
Select "EGR SYSTEM P0400" of "EGR SYSTEM" in "DTC WORK SUPPORT" mode with CONSULT-II.
Touch "START".
Accelerate vehicle to a speed of 40 km/h (25 MPH) once and then stop vehicle with engine running.
If "COMPLETED" appears on CONSULT-II screen, go to step 8.

If "COMPLETED" does not appear on CONSULT-II screen, go to the following step.
When the following conditions are met, "TESTING" will be displayed on the CONSULT-II screen. Maintain the conditions until "TESTING" changes to "COMPLETED". (It will take approximately 30 seconds or more.)

Fig 2: Checking Reference Chart
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 3: Displaying Out Of Condition Screen
Courtesy of NISSAN MOTOR CO., U.S.A.

If "TESTING" is not displayed after 5 minutes, retry from step 2.
Make sure that "OK" is displayed after touching "SELF-DIAG RESULTS". If "NG" is displayed, refer to DIAGNOSTIC PROCEDURE .