Diagnosis Procedure

WARNING: This page is about a different car, the 2011 Nissan Xterra. However, it is still accessible from the selected car via links, so may be relevant.

CHECK GROUND CONNECTIONS
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.
CHECK CONNECTOR
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.
  
  Fig 2: Identifying Fuel Filler Pipe, EVAP Control System Pressure Sensor, Evap Canister And Drain Filter
  Courtesy of NISSAN NORTH AMERICA, INC.
  
  OK or NG
  
  OK: GO TO 3.
  
  NG: Repair or replace harness connector.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between EVAP control system pressure sensor terminal 3 and ground with CONSULT-III or tester.
  Voltage: Approximately 5V
  
  Fig 3: Checking Voltage Between EVAP Control System Pressure Sensor Terminal 3 And Ground
  Courtesy of NISSAN NORTH AMERICA, INC.
  
  OK or NG
  
  OK: GO TO 5.
  
  NG: GO TO 4.
DETECT MALFUNCTIONING PART
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.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
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 .
  
  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 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.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 32 and EVAP control system pressure sensor terminal 2.
  Refer to 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.
DETECT MALFUNCTIONING PART
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.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
Refer to "COMPONENT INSPECTION ".

OK or NG

OK: GO TO 10.

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

INSPECTION END