Diagnostic Procedure

Do you have CONSULT-II?

Yes or No 

1. Yes GO TO 2.
2. No GO TO  3 .

With CONSULT-II 

1. Turn ignition switch "ON".
2. Select "SWIRL CONT SOL VALVE" in "ACTIVE TEST" mode with CONSULT-II.
3. Touch "ON" and "OFF" on CONSULT-II screen.
   Fig 1: SWIRL CONT SOL VALVE Active Test Display

   Courtesy of NISSAN MOTOR CO., U.S.A.
4. Make sure that clicking sound is heard from the swirl control valve control solenoid valve.

OK or NG 

1. OK: GO TO  6 .
2. NG: GO TO 3.

1. ignition switch "OFF".
2. Disconnect swirl control valve control solenoid valve harness connector.
   Fig 2: Identifying Swirl Control Valve Control Solenoid Valve Power Supply Circuit

   Courtesy of NISSAN MOTOR CO., U.S.A.
3. Turn ignition switch "ON".
4. Check voltage between swirl control valve control solenoid valve terminal 1 and ground with CONSULT-II or tester.
   Fig 3: Checking Voltage Between Swirl Control Valve Control Solenoid Valve Terminal 1 And Ground

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

   Voltage: Battery voltage 

OK or NG 

1. OK: GO TO  5 .
2. NG: GO TO 4.

Check the following.

• Harness connectors E1, M1
• Harness connectors M33, F22
• Harness for open or short between swirl control valve control solenoid valve and ECM relay

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

1. Turn ignition switch "OFF".
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 27 and swirl control valve 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 

1. OK: GO TO 6.
2. NG: Repair open circuit or short to ground or short to power in harness connectors.

With CONSULT-II 

1. Reconnect the disconnected harness connectors.
2. Start engine and let it idle.
3. Remove vacuum hose connected to swirl control valve actuator.
4. Select "SWIRL CONT SOL VALVE" in "ACTIVE TEST" mode with CONSULT-II.
5. Touch "ON" and "OFF" on CONSULT-II screen.
6. Check vacuum existence and operation delay time under the following conditions.
   Fig 4: Identifying Swirl Control Valve Control Solenoid Valve

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

   Operation takes less than 1 second. 

Without CONSULT-II 

1. Reconnect ECM harness connector.
2. Remove vacuum hose connected to swirl control valve actuator.
3. Start engine and let it idle.
4. Apply 12V of direct current between swirl control valve control solenoid valve terminals 1 and 2.
5. Check vacuum existence and operation delay time under the following conditions.
   Fig 5: Applying 12V Of Direct Current Between Swirl Control Valve Control Solenoid Valve Terminals 1 And 2

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

   Operation takes less than 1 second. 

OK or NG 

1. OK: GO TO 7.
2. NG: Replace intake manifold collector assembly.

Perform "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT  " .

1. INSPECTION END