With CONSULT-II

Turn ignition switch OFF.
Disconnect EGR volume control valve harness connector.
Check resistance between EGR volume control valve terminal 2 and terminals 1, 3, terminal 5 and terminals 4, 6.
Resistance: 20 - 24 Ω [at 20°C (68F°)]

Fig 1: Checking Resistance Between EGR Volume Control Valve Terminal 2 And Terminals 1, 3, Terminal 5 And Terminals 4, 6
Courtesy of NISSAN MOTOR CO., U.S.A.

If NG, replace EGR volume control valve.

If OK, go to next step.
Remove EGR volume control valve.
Reconnect ECM harness connector and EGR volume control valve harness connector.
Turn ignition switch ON.
Perform "EGR VOL CONT/V" in "ACTIVE TEST" mode with CONSULT-II.

Fig 2: CONSULT-II Display - ACTIVE TEST
Courtesy of NISSAN MOTOR CO., U.S.A.
Check that EGR volume control valve shaft moves smoothly forward and backward according to the valve opening steps.
If NG, replace EGR volume control valve.

Fig 3: Checking EGR Volume Control Valve Shaft
Courtesy of NISSAN MOTOR CO., U.S.A.