Diagnostic Procedure

INSPECTION START
Do you have CONSULT-II?

Yes or No

Yes: GO TO 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.
4. Check for operating sound of the valve.
  Clicking noise should be heard.
OK or NG

OK: GO TO 7.

NG: GO TO 3.

Fig 1: Display "VENT CONTROL/V" In "ACTIVE TEST" Mode
Courtesy of NISSAN MOTOR CO., U.S.A.
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: Locating EVAP Canister Vent Control Valve & EVAP Control System Pressure Sensor
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Turn ignition switch ON.
4. Check voltage between EVAP canister vent control valve terminal 1 and ground with CONSULT-II or tester.
  Voltage: Battery voltage
OK or NG

OK: GO TO 5.

NG: GO TO 4.

Fig 3: Checking Voltage Between EVAP Canister Vent Control Valve Terminal 1 & Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E41, C1
- IPDM E/R harness connector E119
- Harness for open or short between EVAP canister vent control valve and IPDM E/R
  : Repair 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 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 7.

NG: GO TO 6.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E41, C1
- Harness for open or short between EVAP canister vent control valve and ECM
  : 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

OK: GO TO 8.

NG: Clean the rubber tube using an air blower.
CHECK EVAP CANISTER VENT CONTROL VALVE
Refer to COMPONENT INSPECTION .

OK or NG

OK: GO TO 9.

NG: Replace EVAP canister vent control valve.
CHECK INTERMITTENT INCIDENT
Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

: INSPECTION END