Diagnostic Procedure

1. Turn ignition switch ON.
2. Pinch fuel feed hose with two fingers.
   1. Fuel pressure pulsation should be felt on the fuel feed hose for 1 second after ignition switch is turned ON. 

OK or NG 

1. OK: INSPECTION END
2. NG: GO TO 2.

Fig 1: Identifying Fuel Feed Hose

Courtesy of NISSAN MOTOR CO., U.S.A.

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-II or tester.
   1. Voltage: Battery voltage 

OK or NG 

1. OK: GO TO  5.
2. NG: GO TO 3.

Fig 2: Checking Voltage Between ECM Terminal 113 And Ground With Consult-II

Courtesy of NISSAN MOTOR CO., U.S.A.

1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector E122.
3. Turn ignition switch ON.
4. Check voltage between IPDM E/R terminal 46 and ground with CONSULT-II or tester.
   1. Voltage: Battery voltage 

OK or NG 

1. OK: GO TO 4.
2. NG: GO TO  13.

Fig 3: Checking Fuel Pump Power Supply Circuit-II

Courtesy of NISSAN MOTOR CO., U.S.A.

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

1. Repair harness or connectors.

1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Disconnect condenser harness connector.
4. Turn ignition switch ON.
   Fig 4: Identifying Condenser - 2 And IPDM E/R

   Courtesy of NISSAN MOTOR CO., U.S.A.
5. Check voltage between condenser terminal 1 and ground with CONSULT-II or tester.
   1. 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.

OK or NG 

1. OK: GO TO  8.
2. NG: GO TO 6.

Fig 5: Checking Voltage Between Condenser Terminal 1 And Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

1. Turn ignition switch OFF.
2. Disconnect 15A fuse.
3. Check 15A fuse.

OK or NG 

1. OK: GO TO 7.
2. NG: Replace fuse.

1. Disconnect IPDM E/R harness connector E119.
2. Check harness continuity between IPDM E/R terminal 13 and condenser terminal 1. Refer to WIRING DIAGRAM .
   1. Continuity should exist. 
3. Also check harness for short to ground and short to power.

OK or NG 

1. OK: GO TO  13.
2. NG: Repair open circuit or short to ground or short to power in harness or connectors.

1. Check harness continuity between condenser terminal 2 and ground. Refer to WIRING DIAGRAM .
   1. Continuity should exist. 
2. Also check harness for short to power.

OK or NG 

1. OK: GO TO 9.
2. NG: Repair open circuit or short to power in harness or connectors.

Refer to "COMPONENT INSPECTION ".

OK or NG 

1. OK: GO TO 10.
2. NG: Replace condenser.

1. Turn ignition switch OFF.
2. Disconnect "fuel level sensor unit and fuel pump" harness connector.
3. Disconnect IPDM E/R harness connector E119.
4. Check harness continuity between IPDM E/R terminal 13 and "fuel level sensor unit and fuel pump" terminal 1, "fuel level sensor unit and fuel pump" terminal 3 and ground. Refer to WIRING DIAGRAM .
   1. Continuity should exist. 
   Fig 6: Identifying Fuel Pump Sensor Unit And Fuel Pump Harness Connector

   Courtesy of NISSAN MOTOR CO., U.S.A.
5. Also check harness for short to ground and short to power.

OK or NG 

1. OK: GO TO  12.
2. NG: GO TO 11.

Check the following.

• Harness connectors E41, C1
• Harness for open or short between fuel pump and IPDM E/R
• Harness for open or short between fuel pump and ground
  1. Repair open circuit or short to ground or short to power in harness or connectors.

Refer to "COMPONENT INSPECTION ".

OK or NG 

1. OK: GO TO 13.
2. NG: Replace "fuel level sensor unit and fuel pump".

Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

OK or NG 

1. OK: Replace IPDM E/R.
2. NG: Repair or replace harness or connectors.