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: ACTIVE TEST, VIAS SOL VALVE - CONSULT-II Display

   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 (With CONSULT-II)

   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 (Without CONSULT-II)

   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.
   Fig 4: ACTIVE TEST, VIAS SOL VALVE - CONSULT-II Display Screen

   Courtesy of NISSAN MOTOR CO., U.S.A.
4. Turn VIAS control solenoid valve "ON" and "OFF", and check vacuum existence under the following conditions.
   VIAS SOL VALVE CONDITION AND VACUUM EXISTENCE REFERENCE
   
   

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

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

   Courtesy of NISSAN MOTOR CO., U.S.A.
5. Check vacuum existence under the following conditions.
   VIAS CONTROL SOLENOID VALVE VACUUM EXISTENCE REFERENCE
   
   

   Condition	Vacuum
   12V direct current supply	Should exist.
   No supply	Should not exist.

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 ".

Fig 6: Checking Vacuum Hoses

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

OK or NG 

1. OK : GO TO 5.
2. NG : Repair hoses or tubes.

Refer to "COMPONENT INSPECTION ".

OK or NG 

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

1. Turn ignition switch OFF.
2. Disconnect VIAS control solenoid valve harness connector.
3. Turn ignition switch ON.
   Fig 7: Identifying VIAS Control Solenoid Valve, Power Valve Actuator And Intake Manifold Collector

   Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check voltage between VIAS control solenoid valve terminal 1 and ground with CONSULT-II or tester
   1. Voltage: Battery voltage 
   Fig 8: Checking Voltage Between VIAS Control Solenoid Valve Connector Terminal 1 And Ground

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

OK or NG 

1. OK : GO TO  8.
2. NG : GO TO 7.

1. Turn ignition switch OFF.
2. Disconnect ECM relay.
   Fig 9: Locating ECM Relay

   Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check harness continuity between ECM relay terminal 7 and VIAS control solenoid valve terminal 1

   Refer to WIRING DIAGRAM .

   1. Continuity should exist. 
4. Also check harness for short to ground and short to power.

OK or NG 

1. OK : GO TO 8.
2. NG : Repair open circuit or short to ground or short to power in harness or connectors.

Check voltage between ECM relay terminal 6 and ground with CONSULT-II or tester.

Fig 10: Checking Voltage Between ECM Relay Connector Terminal 6 And Ground

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

Voltage: Battery voltage 

OK or NG 

1. OK : GO TO  10.
2. NG : GO TO 9.

Check the following.

• Harness connectors E10, F48
• Fuse and fusible link box connector E22
• 15A fuse
• Harness for open or short between ECM relay and battery
  1. : Repair or replace harness or connectors.

Refer to "COMPONENT INSPECTION ".

OK or NG 

1. OK : GO TO  13.
2. NG : Replace ECM relay.

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 .

   1. Continuity should exist. 
4. Also check harness for short to ground and short to power.

OK or NG 

1. OK : GO TO 12.
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 13.
2. NG : Replace VIAS control solenoid valve.

Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

1. : INSPECTION END