Diagnosis Procedure

CHECK VIAS CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
  - Vehicle Front
2. Disconnect VIAS control solenoid (1) valve harness connector.
  
  Fig 1: Identifying VIAS Control Solenoid Valve Harness Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Turn ignition switch ON.
4. Check voltage between terminal 1 and ground with CONSULT-III or tester.
Voltage: Battery voltage

OK or NG

OK: GO TO 3.

NG: GO TO 2.

Fig 2: Checking Voltage Between Terminal 1 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E12, F3
- Harness for open or short between VIAS control solenoid valve and IPDM E/R
Repair or replace 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 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 4.

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 5.

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

INSPECTION END