With Consult-II

Start engine and warm it up to normal operating temperature.
Select "A/F SEN1 (B1)" in "DATA MONITOR" mode with CONSULT-II.
Check "A/F SEN1 (B1)" indication.
If the indication is constantly approx. 5V, go to "DIAGNOSTIC PROCEDURE ".

If the indication is not constantly approx. 5V, go to next step.
Select "A/F SEN1 (B1) P1278/P1279" of "A/F SEN1" in "DTC WORK SUPPORT" mode.
Touch "START".

Fig 1: Displaying Data Monitor Mode With Consult-II
Courtesy of NISSAN MOTOR CO., U.S.A.
When the following conditions are met, "TESTING" will be displayed on the CONSULT-II screen.

Fig 2: Specifications Table
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 3: Displaying OUT OF CONDITION With Consult-II Screen
Courtesy of NISSAN MOTOR CO., U.S.A.

If "TESTING" is not displayed after 20 seconds, retry from step 2.
Following the instructions of CONSULT-II screen, set D position with "OD" OFF and release accelerator pedal fully.

Fig 4: Displaying TESTING With Consult-II Screen
Courtesy of NISSAN MOTOR CO., U.S.A.
Make sure that "TESTING" changes to "COMPLETED".
If "TESTING" changed to "OUT OF CONDITION", retry from step 6.
Touch "BACK" and "MODE", then select "SELF-DIAG RESULT" mode.
If P1272 is displayed, go to "DIAGNOSTIC PROCEDURE ". If another DTC is displayed, go to the corresponding Diagnostic Procedure.

Fig 5: Displaying COMPLETED With Consult-II Screen
Courtesy of NISSAN MOTOR CO., U.S.A.