Diagnostic Procedure

With CONSULT-II 

1. Start engine and warm it up to normal operating temperature.
2. Perform "VIAS SOL VALVE" in "ACTIVE TEST" mode with CONSULT-II.
   Fig 1: Displaying ACTIVE TEST Mode

   Courtesy of NISSAN MOTOR CO., U.S.A.
3. Turn VIAS control solenoid valve ON and OFF, and make sure that power valve actuator rod moves.
   Fig 2: Checking Power Valve Actuator Rod Movement (1 Of 2)

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

Without CONSULT-II 

1. Start engine and warm it up to normal operating temperature.
2. Rev engine quickly up to above 5, 000 RPM and make sure that power valve actuator rod moves.
   Fig 3: Checking Power Valve Actuator Rod Movement (2 Of 2)

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

OK or NG

1. OK : INSPECTION END 
2. NG (With CONSULT-II) : GO TO 2.
3. NG (Without CONSULT-II) : GO TO  3.

With CONSULT-II 

1. Stop engine and disconnect vacuum hose connected to power valve actuator.
2. Start engine and let it idle.
3. Perform "VIAS SOL VALVE" in "ACTIVE TEST" mode with CONSULT-II.
4. Turn VIAS control solenoid valve ON and OFF, and check vacuum existence under the following conditions.
   VACUUM EXISTENCE CONDITIONS
   
   

   VIAS SOL VALVE	Vacuum
   ON	Should exist.
   OFF	Should not exist.

   Fig 4: Displaying ACTIVE TEST Mode

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

OK or NG

1. OK : Repair or replace power valve actuator.
2. NG : GO TO  4.

Without CONSULT-II 

1. Stop engine and disconnect vacuum hose connected to power valve actuator.
2. Disconnect VIAS control solenoid valve harness connector.
3. Start engine and let it idle.
4. Apply 12V of direct current between VIAS control solenoid valve terminals 1 and 2.
5. Check vacuum existence under the following conditions.

Fig 5: Applying 12V Of Direct Current Between VIAS Control Solenoid Valve Terminals 1 & 2

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

OK or NG

1. OK : Repair or replace power valve actuator.
2. NG : GO TO 4.

1. Stop engine.
2. Check hoses and tubes between intake manifold and power valve actuator for crack, clogging, improper connection or disconnection. Refer to "VACUUM HOSE DRAWING ".

OK or NG

1. OK : GO TO 5.
2. NG : Repair hoses or tubes.
   Fig 6: Checking Vacuum Hose

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

Refer to "COMPONENT INSPECTION ".

OK or NG

1. OK : GO TO 6.
2. NG : Replace vacuum tank.

1. Turn ignition switch ON.
2. Disconnect VIAS control solenoid valve harness connector.
3. Turn ignition switch ON.
   Fig 7: Identifying VIAS Control Solenoid Valve

   Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check voltage between terminal 1 and ground with CONSULT-II or tester.

   Voltage: Battery voltage 

OK or NG

1. OK : GO TO  8.
2. NG : GO TO 7.
   Fig 8: Checking Voltage Between Terminal 1 & Ground

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

Check the following.

• Harness connectors E20, F32
• IPDM E/R connector E122
• 10A fuse
• Harness continuity between fuse and VIAS control solenoid valve

1. : Repair harness or connectors.

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 29 and VIAS control solenoid valve terminal 2. Refer to Wiring Diagram .

   Continuity should exist. 

4. Also check harness for short to ground and short to power.

OK or NG

1. OK : GO TO 9.
2. NG : Repair open circuit or short to ground or short to power in harness or connectors.

Refer to "COMPONENT INSPECTION ".

OK or NG

1. OK : GO TO 10.
2. NG : Replace VIAS control solenoid valve.

Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

1. >> INSPECTION END