Diagnosis Procedure

1. Turn ignition switch ON.
2. Pinch fuel feed hose with two fingers.

   Fuel pressure pulsation should be felt on the fuel feed hose for 1 second after ignition switch is turned ON  .

   Fig 1: Identifying Oil Filler Cap, Fuel Feed Hose & Pinch Area

   Courtesy of NISSAN NORTH AMERICA, INC.

   OK or NG 

   OK: INSPECTION END 

   NG: GO TO 2.

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Turn ignition switch ON.
4. Check voltage between ECM terminal 113 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 voltage between IPDM E/R terminal 46 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  12.

Check harness for open or short between IPDM E/R and ECM

: Repair harness or connectors.

1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Disconnect "fuel level sensor unit and fuel pump" harness connector.
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.

   Voltage: Battery voltage should exist for 1 second after ignition switch is turned ON  .

6. Also check harness for short to ground and short to power.
   Fig 5: Checking Fuel Pump Power Supply Circuit-III

   Courtesy of NISSAN NORTH AMERICA, INC.

   OK or NG 

   OK: GO TO  9.

   NG: GO TO 6.

1. Turn ignition switch OFF.
2. Disconnect 15A fuse.
3. Check 15 A fuse (No. 48).

   OK or NG 

   OK: GO TO 7.

   NG: Replace 15A fuse.

1. Disconnect IPDM E/R harness connector E119.
2. Check harness continuity between "fuel level sensor unit and fuel pump" terminal 1 and IPDM E/R terminal 13.

   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  12.

   NG: GO TO 8.

Check the following.

• Harness connectors C1, E41
• Harness for open or short between "fuel level sensor unit and fuel pump" and IPDM E/R

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

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 ground.

   OK or NG 

   OK: GO TO  11.

   NG: GO TO 10.

Check the following.

• Harness connectors C1, E41
• Harness for open or short between "fuel level sensor unit and fuel pump" and ground

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

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 12.

NG: Replace fuel pump. Refer to "REMOVAL AND INSTALLATION ".

Refer to "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.