Diagnosis Procedure

With CONSULT 

1. Start engine and warm it up to normal operating temperature.
2. Perform "VIAS S/V-1" in "ACTIVE TEST" mode with CONSULT.
3. Turn VIAS control solenoid valve "ON" and "OFF", and make sure that power valve actuator rod moves.
   Fig 1: Checking Power Valve Actuator Rod Movement

   Courtesy of NISSAN NORTH AMERICA, INC.

Without CONSULT 

1. Start engine and warm it up to normal operating temperature.
2. Rev engine up to between 2, 200 and 3, 300 rpm and make sure that power valve actuator rod moves.
   Fig 2: Checking Power Valve Actuator Rod Movement

   Courtesy of NISSAN NORTH AMERICA, INC.

   OK or NG 

   OK: INSPECTION END 

   NG (With CONSULT): GO TO 2.

   NG (Without CONSULT): GO TO  3.

With CONSULT 

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.
4. Turn VIAS control solenoid valve "ON" and "OFF", and check vacuum existence under the following conditions.

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

   OK or NG 

   OK: Repair or replace power valve actuator.

   NG: GO TO  4.

Without CONSULT 

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.

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

   Fig 3: Checking VIAS Control Solenoid Valve

   Courtesy of NISSAN NORTH AMERICA, INC.

   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 ".
   Fig 4: Checking Hoses & Tubes

   Courtesy of NISSAN NORTH AMERICA, INC.

   OK or NG 

   OK: GO TO 5.

   NG: Repair hoses or tubes.

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 6.

NG: Replace vacuum tank. Refer to "EXPLODED VIEW ".

1. Turn ignition switch OFF.
2. Disconnect VIAS control solenoid valve harness connector.
Fig 5: Identifying VIAS Control Solenoid Valve And Power Valve Actuator
Courtesy of NISSAN NORTH AMERICA, INC.
3. Turn ignition switch ON.
4. Check voltage between terminal 1 and ground with CONSULT or tester.
   Fig 6: Checking VIAS Control Solenoid Valve Power Supply Circuit

   Courtesy of NISSAN NORTH AMERICA, INC.

   Voltage: Battery voltage 

   OK or NG 

   OK: GO TO  8.

   NG: GO TO 7.

Check the following.

• Harness connectors E2, F32
• Harness for open or short between VIAS control solenoid valve and IPDM E/R
• Harness for open or short between VIAS control solenoid valve and ECM

  : 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 

   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 "EXPLODED VIEW ".

Refer to "INTERMITTENT INCIDENT ".

: INSPECTION END