Diagnostic Procedure

INSPECTION START
1. Do you have CONSULT-II?
Yes or No
1. Yes GO TO 2.
2. No GO TO 3 .
CHECK EVAP CANISTER VENT CONTROL VALVE CIRCUIT
WITH CONSULT-II
1. Turn ignition switch "OFF" and then turn "ON".
2. Select "VENT CONTROL/V" in "ACTIVE TEST" mode with CONSULT-II.
3. Touch "ON/OFF" on CONSULT-II screen.
  
  Fig 1: CONSULT-II Function Display Active Test
  Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check for operating sound of the valve.
  Clicking noise should be heard.
OK or NG
1. OK: GO TO 7 .
2. NG: GO TO 3.
CHECK EVAP CANISTER VENT CONTROL VALVE POWER SUPPLY CIRCUIT
1. Turn ignition switch "OFF".
2. Disconnect EVAP canister vent control valve harness connector.
  
  Fig 2: Identifying EVAP Canister Vent Control Valve Harness Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Turn ignition switch "ON".
4. Check voltage between EVAP canister vent control valve terminal 2 and ground with CONSULT-II or tester.
Fig 3: Checking Voltage Between EVAP Canister Vent Control Valve Terminal 2 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.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E1, M1
- Harness connectors M33, F22
- Harness connectors F27, M94
- Harness connectors M2, B1
- Harness connectors B43, M101
- Harness for open or short between EVAP canister vent control valve and ECM relay
1. Repair open circuit or short to ground or short to power in harness or connectors.
CHECK EVAP CANISTER VENT CONTROL 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 117 and EVAP canister vent control valve terminal 1.
  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 7 .
2. NG: GO TO 6.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors B101, B43
- Harness connectors B1, M2
- Harness connectors M94, F27
- Harness for open or short between EVAP canister vent control valve and ECM
1. Repair open circuit or short to ground or short to power in harness or connectors.
CHECK RUBBER TUBE FOR CLOGGING
1. Disconnect rubber tube connected to EVAP canister vent control valve.
2. Check the rubber tube for clogging.
OK or NG
1. OK: GO TO 8.
2. NG: Clean the rubber tube using an air blower
CHECK EVAP CANISTER VENT CONTROL VALVE-I
1. Remove EVAP canister vent control valve from EVAP canister.
2. Check portion B of EVAP canister vent control valve for being rusted.
Fig 4: Removing EVAP Canister Vent Control Valve From EVAP Canister
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK: GO TO 9.
2. NG: Replace EVAP canister vent control valve.
CHECK EVAP CANISTER VENT CONTROL VALVE-II
WITH CONSULT-II
1. Reconnect harness connectors disconnected.
2. Turn ignition switch "ON".
3. Perform "VENT CONTROL/V" in "ACTIVE TEST" mode
4. Check air passage continuity and operation delay time.
Fig 5: CONSULT-II Function Display Active Test
Courtesy of NISSAN MOTOR CO., U.S.A.

WITHout CONSULT-II

Check air passage continuity and operation delay time under the following conditions.

Fig 6: Checking Air Passage Continuity And Operation Delay Time
Courtesy of NISSAN MOTOR CO., U.S.A.

Make sure new O-ring is installed properly.

OK or NG
1. OK: GO TO 11 .
2. NG: GO TO 10.
CHECK EVAP CANISTER VENT CONTROL VALVE-III
1. Clean the air passage (Portion A to B ) of EVAP canister vent control valve using an air blower.
2. Perform Test No. 9 again.
OK or NG
1. OK: GO TO 11.
2. NG: GO Replace EVAP canister vent control valve.
CHECK INTERMITTENT INCIDENT
Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT " .
1. INSPECTION END