Diagnosis Procedure

With CONSULT-III 

1. Start engine and warm it up to normal operating temperature.
2. Perform "VIAS S/V-1" in "ACTIVE TEST" mode with CONSULT-III.
3. Turn VIAS control solenoid valve ON and OFF, and check that power valve actuator (1) rod moves.

Fig 1: [Moving Power Valve Actuator Rod]

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

Without CONSULT-III 

1. Lift up the vehicle.
2. Start engine and warm it up to normal operating temperature.
3. Check that power valve actuator (1) rod moves when changing the selector lever position to the N and D alternately.

OK or NG 

OK: INSPECTION END 

NG (With CONSULT-III): GO TO 2.

NG (Without CONSULT-III): GO TO  3.

Fig 2: [Moving Power Valve Actuator Rod]

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

With CONSULT-III 

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

OK or NG 

OK: Repair or replace power valve actuator.

NG: GO TO  4.

Without CONSULT-III 

1. Stop engine and disconnect vacuum hose connected to power valve actuator.
2. Disconnect VIAS control solenoid valve (1) harness connector.
   • Vehicle Front
3. Start engine and let it idle.
   Fig 3: Identifying VIAS Control Solenoid Valve

   Courtesy of NISSAN MOTOR CO., U.S.A.
4. Apply 12 V of direct current between VIAS control solenoid valve terminals 1 and 2.
5. Check vacuum existence under the following conditions.

Fig 4: Applying 12V Of Direct Current Between VIAS Control Solenoid Valve Terminals

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

OK or NG 

OK: Repair or replace power valve actuator.

NG: GO TO 4.

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

OK or NG 

OK: GO TO 5.

NG: Repair hoses or tubes.

Fig 5: Checking Hoses And Tubes

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

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 6.

NG: Replace vacuum tank.

1. Turn ignition switch OFF.
2. Disconnect VIAS control solenoid valve (1) harness connector.
   • Vehicle Front
3. Turn ignition switch ON.
   Fig 6: Identifying VIAS Control Solenoid Valve Harness Connector

   Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check voltage between VIAS control solenoid valve terminal 1 and ground with CONSULT-III or tester.

Voltage: Battery voltage 

OK or NG 

OK: GO TO  8.

NG: GO TO 7.

Fig 7: Checking Voltage Between VIAS Control Solenoid Valve Terminal 1 And Ground

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

Check the following.

• Harness connectors E12, F3
• Harness continuity between IPDM E/R and VIAS control solenoid valve

Repair open circuit or short to ground or short to power in 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 SYSTEM WIRING DIAGRAMS article.

   Continuity should exist  .

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

OK or NG 

OK: GO TO 9.

NG: Repair open circuit or short to ground or short to power in harness or connectors.

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 10.

NG: Replace VIAS control solenoid valve.

Refer to "DIAGNOSIS PROCEDURE ".

INSPECTION END