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. 4.5V, go to "DIAGNOSTIC PROCEDURE ".

If the indication is not constantly approx. 4.5V, go to next step.
Select "A/F SEN1 (B1) P1278/P1279" of "A/F SEN1" in "DTC WORK SUPPORT" mode.
Touch "START".

Fig 1: CONSULT II Display - Data Monitor
Courtesy of NISSAN MOTOR CO., U.S.A.

When the following conditions are met, "TESTING" will be displayed on the CONSULT-II screen.

CONDITIONS LIST

ENG SPEED	1, 000 - 3, 200 rpm
Vehicle speed	More than 40 km/h (25 MPH)
B/FUEL SCHDL	1.5 - 9.0 msec
Selector lever	D position with "OD" OFF (A/T) 4th position (M/T)

If "TESTING" is not displayed after 20 seconds, retry from step 2 .

Fig 2: CONSULT II Display - A/F Sen1 (B1) P1278/P1279 Out Of Condition

Courtesy of NISSAN MOTOR CO., U.S.A.

Following the instructions of CONSULT-II screen, set D position with "OD" OFF (A/T) or 3rd position (M/T) and release accelerator pedal fully.

Fig 3: CONSULT-II Display - TESTING
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 P0132 is displayed, go to "DIAGNOSTIC PROCEDURE ".

If another DTC is displayed, go to the corresponding DIAGNOSTIC PROCEDURE .

Fig 4: CONSULT II Display - A/F Sen1 (B1) P1278/P1279 Completed
Courtesy of NISSAN MOTOR CO., U.S.A.