Diagnosis Procedure

CHECK OVERALL FUNCTION
1. Turn ignition switch ON.
2. Pinch fuel feed hose (1) with two fingers.
  - Illustration shows the view with intake air duct removed.
    
    Fig 1: Pinching Fuel Feed Hose
    Courtesy of NISSAN NORTH AMERICA, INC.
    
    Fuel pressure pulsation should be felt on the fuel feed hose for 1 second after ignition switch is turned ON.
  OK or NG
  
  OK: INSPECTION END
  
  NG: GO TO 2.
CHECK FUEL PUMP POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Turn ignition switch ON.
4. Check voltage between ECM terminal 23 and ground with CONSULT or tester.
  
  Fig 2: Checking Fuel Pump Power Supply Circuit-I
  Courtesy of NISSAN NORTH AMERICA, INC.
  
  Voltage: Battery voltage
  
  OK or NG
  
  OK: GO TO 5.
  
  NG: GO TO 3.
CHECK FUEL PUMP POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector E46.
3. Turn ignition switch ON.
4. Check voltage between IPDM E/R terminal 47 and ground with CONSULT or tester.
  
  Fig 3: Checking Fuel Pump Power Supply Circuit-II
  Courtesy of NISSAN NORTH AMERICA, INC.
  
  Voltage: Battery voltage
  
  OK or NG
  
  OK: GO TO 4.
  
  NG: GO TO 11.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E8, F8
- Harness for open or short between IPDM E/R and ECM
  : Repair open circuit or short to ground or short to power in harness or connectors.
CHECK FUEL PUMP POWER SUPPLY CIRCUIT-III
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Disconnect "fuel level sensor unit and fuel pump" harness connector (1).
  
  Fig 4: Identifying Fuel Level Sensor Unit & Fuel Pump Harness Connector
  Courtesy of NISSAN NORTH AMERICA, INC.
4. Turn ignition switch ON.
5. Check voltage between "fuel level sensor unit and fuel pump" terminal 1 and ground with CONSULT or tester.
  
  Fig 5: Checking Fuel Pump Power Supply Circuit-III
  Courtesy of NISSAN NORTH AMERICA, INC.
  
  Voltage: Battery voltage should exist for 1 second after ignition switch is turned ON.
  
  OK or NG
  
  OK: GO TO 9.
  
  NG: GO TO 6.
CHECK 15 A FUSE
1. Turn ignition switch OFF.
2. Disconnect 15 A fuse.
3. Check 15 A fuse.
  OK or NG
  
  OK: GO TO 7.
  
  NG: Replace fuse.
CHECK FUEL PUMP POWER SUPPLY CIRCUIT-IV
1. Disconnect IPDM E/R harness connector E45.
2. Check harness continuity between IPDM E/R terminal 36 and "fuel level sensor unit and fuel pump" terminal 1. Refer to Wiring Diagram .
  Continuity should exist.
3. Also check harness for short to ground and short to power.
  OK or NG
  
  OK: GO TO 11.
  
  NG: GO TO 8.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors M69, E7
- Harness connectors M12, B101
- Harness for open or short between IPDM E/R and "fuel level sensor unit and fuel pump"
  : Repair open circuit or short to ground or short to power in harness or connectors.
CHECK FUEL PUMP GROUND CIRCUIT
1. Check harness continuity between "fuel level sensor unit and fuel pump" terminal 3 and ground.
  Refer to Wiring Diagram .
  
  Continuity should exist.
2. Also check harness for short to power.
  OK or NG
  
  OK: GO TO 10.
  
  NG: Repair or replace harness or connectors.
CHECK FUEL PUMP
Refer to "COMPONENT INSPECTION ".

OK or NG

OK: GO TO 11.

NG: Replace fuel pump. Refer to "COMPONENT ".
CHECK INTERMITTENT INCIDENT
Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

OK or NG

OK: Replace IPDM E/R. Refer to "REMOVAL AND INSTALLATION OF IPDM E/R ".

NG: Repair or replace harness or connectors.