Diagnostic Procedure

WARNING: This page is about a different car, the 2006 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

CHECK OVERALL FUNCTION
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: CONSULT-II Display - Active Test
  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: Identifying Power Valve Actuator
  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 up to between 2, 200 and 3, 300 rpm and make sure that power valve actuator rod moves.
OK or NG

OK: INSPECTION END

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

NG (Without CONSULT-II): GO TO 3.

Fig 3: Identifying Power Valve Actuator
Courtesy of NISSAN MOTOR CO., U.S.A.

CHECK VACUUM EXISTENCE

With CONSULT-II

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

VIAS SOLENOID VALVE VACCUM

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

Fig 4: CONSULT-II Display - Active Test

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

OK or NG

OK: Repair or replace power valve actuator.

NG: GO TO 4.

CHECK VACUUM EXISTENCE

Without CONSULT-II

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

VACCUM CONDITION

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

Fig 5: Checking Vacuum Existence

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

OK or NG

OK: Repair or replace power valve actuator.

NG: GO TO 4.

CHECK VACUUM HOSE
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

OK: GO TO 5.

NG: Repair hoses or tubes.

Fig 6: Checking Vacuum Hose
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK VACUUM TANK
Refer to "COMPONENT INSPECTION "

OK or NG

OK: GO TO 6.

NG: Replace vacuum tank.
CHECK VIAS CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect VIAS control solenoid valve harness connector.
3. Turn ignition switch ON.
  
  Fig 7: Checking Vias Control Solenoid Valve Power Supply Circuit
  Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check voltage between terminal 1 and ground with CONSULT-II or tester.
Voltage: Battery voltage

Fig 8: Checking Voltage Between Terminal 1 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: GO TO 8.

NG: GO TO 7.
DETECT MALFUNCTIONING PART
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.
CHECK VIAS CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
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.
CHECK VIAS CONTROL SOLENOID VALVE
Refer to "COMPONENT INSPECTION "

OK or NG

OK: GO TO 10.

NG: Replace VIAS control solenoid valve.
CHECK INTERMITTENT INCIDENT
Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT "

: INSPECTION END