Diagnosis Procedure

1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body. Refer to "GROUND INSPECTION ".

Fig 1: Checking Ground Connections

Courtesy of NISSAN NORTH AMERICA, INC.

OK or NG 

OK: GO TO 2.

NG: Repair or replace ground connections.

1. Disconnect EVAP control system pressure sensor (2) harness connector.
   • Fuel filler pipe (1)
   • EVAP canister vent control valve (3)
   • EVAP canister (4)
   • Drain filter (5)
   • <== : Vehicle front
2. Check sensor harness connector for water.

Water should not exist. 

OK or NG 

OK: GO TO 3.

NG: Repair or replace harness connector.

Fig 2: Identifying Fuel Filler Pipe, EVAP Control System Pressure Sensor, Canister And Drain Filter

Courtesy of NISSAN NORTH AMERICA, INC.

1. Turn ignition switch ON.
2. Check voltage between EVAP control system pressure sensor terminal 3 and ground with CONSULT or tester.

Voltage: Approximately 5V 

OK or NG 

OK: GO TO  5.

NG: GO TO 4.

Fig 3: Checking Voltage Between EVAP Control System Pressure Sensor Harness Connector And Ground

Courtesy of NISSAN NORTH AMERICA, INC.

Check the following.

• Harness connectors C1, E41
• Harness connectors E5, F14
• Harness for open or short between EVAP control system pressure sensor and ECM

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

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between EVAP control system pressure sensor terminal 1 and ECM terminal 67.

   Refer to WIRING DIAGRAM 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.

Check the following.

• Harness connectors C1, E41
• Harness connectors E5, F14
• Harness for open or short between EVAP control system pressure sensor and ECM

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

1. Check harness continuity between ECM terminal 32 and EVAP control system pressure sensor terminal 2.

   Refer to WIRING DIAGRAM Wiring Diagram.

   Continuity should exist. 

2. Also check harness for short to ground and short to power.

OK or NG 

OK: GO TO  9.

NG: GO TO 8.

Check the following.

• Harness connectors C1, E41
• Harness connectors E5, F14
• Harness for open or short between EVAP control system pressure sensor and ECM

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

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 10.

NG: Replace EVAP control system pressure sensor. Refer to "REMOVAL AND INSTALLATION ".

Refer to "INTERMITTENT INCIDENT ".

: INSPECTION END