Diagnostic Procedure

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CHECK OVERALL FUNCTION
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.
OK or NG
1. OK : INSPECTION END
2. NG : GO TO 2.
  
  Fig 1: Pinching Fuel Feed Hose
  Courtesy of NISSAN MOTOR CO., U.S.A.
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 113 and ground with CONSULT-II or tester.
  Voltage: Battery voltage
OK or NG
1. OK : GO TO 5.
2. NG : GO TO 3.
  
  Fig 2: Identifying Voltage Between ECM Terminal 113 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK FUEL PUMP POWER SUPPLY CIRCUIT-II
Check voltage between IPDM E/R terminal 46 and ground with CONSULT-II or tester.

Voltage: Battery voltage

OK or NG
1. OK : GO TO 4.
2. NG : GO TO 13.
  
  Fig 3: Identifying Voltage Between IPDM E/R Terminal 46 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
DETECT MALFUNCTIONING PART
Check harness for open or short between IPDM E/R and ECM.
1. : Repair harness or connectors.
CHECK CONDENSER-2 POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Disconnect condenser-2 harness connector.
4. Turn ignition switch ON.
  
  Fig 4: Identifying Condenser-2 Harness Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
5. Check voltage between condenser-2 terminal 1 and ground with CONSULT-II 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.
OK or NG
1. OK : GO TO 8.
2. NG : GO TO 6.
  
  Fig 5: Identifying Voltage Between Terminal 1 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK 15A FUSE
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.
CHECK CONDENSER-2 POWER SUPPLY CIRCUIT-II FOR OPEN AND SHORT
1. Disconnect IPDM E/R harness connector E119.
2. Check harness continuity between IPDM E/R terminal 13 and condenser-2 terminal 1.
  Refer to WIRING DIAGRAM .
  
  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.
CHECK CONDENSER-2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between condenser-2
  + terminal 2 and ground.
  
  Refer to WIRING DIAGRAM .
  
  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.
CHECK CONDENSER-2
Refer to "COMPONENT INSPECTION ".

OK or NG
1. OK : GO TO 10.
2. NG : Replace condenser-2.
CHECK FUEL PUMP POWER SUPPLY AND GROUND CIRCUIT FOR OPEN AND SHORT
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 .
  
  Continuity should exist.
5. Also check harness for short to ground and short to power.
  
  Fig 6: Identifying " Fuel Level Sensor Unit And Fuel Pump" Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK : GO TO 12.
2. NG : GO TO 11.
DETECT MALFUNCTIONING PART
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.
CHECK FUEL PUMP
Refer to "COMPONENT INSPECTION ".

OK or NG
1. OK : GO TO 13.
2. NG : Replace " fuel level sensor unit and fuel pump".
CHECK INTERMITTENT INCIDENT
Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

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