Diagnostic Procedure

CHECK OVERALL FUNCTION
1. Turn ignition switch ON.
2. Pinch fuel feed hose (1) 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

OK: INSPECTION END

NG: GO TO 2.

Fig 1: Identifying 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-III or tester.
  Voltage: Battery voltage
OK or NG

OK: GO TO 5.

NG: GO TO 3.

Fig 2: Checking 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 40 and ground with CONSULT-III or tester.

Voltage: Battery voltage

OK or NG

OK: GO TO 4.

NG: GO TO 11.

Fig 3: Checking Voltage Between IPDM E/R Terminal 40 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E108, M15
- 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 CONDENSER POWER SUPPLY CIRCUIT
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: Disconnecting Fuel Level Sensor Unit And Fuel Pump Harness Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
  - Illustration shows the view with rear seat cushion and inspection hole cover (RH) removed.
  - ←: Vehicle front
4. Turn ignition switch ON.
5. Check voltage between "fuel level sensor unit and fuel pump" terminal 1 and ground with CONSULT-III or tester.
  Voltage: Battery voltage should exist for 1 second after ignition switch is turned ON.
OK or NG

OK: GO TO 7.

NG: GO TO 6.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E106, B4
- Harness connectors B65, B434
- IPDM E/R connector E8
- Harness for open or short between IPDM E/R and condenser
  >> Repair open circuit or short to ground or short to power in harness or connectors.
CHECK CONDENSER GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect dropping resistor harness connector.
  
  Fig 5: Identifying FPCM And Dropping Resistor
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check harness continuity between condenser terminal 2 and dropping resistor terminal 2.
  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 9.

NG: GO TO 8.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors B65, B434
- Harness for open or short between "fuel level sensor unit and fuel pump" and dropping resistor
- for open or short between dropping resistor and ground.
  >> Repair open circuit or short to ground or short to power in harness or connectors.
CHECK DROPPING RESISTOR
Refer to "COMPONENT INSPECTION ".

OK or NG

OK: GO TO 10.

NG: Replace dropping resistor.
CHECK FUEL PUMP
Refer to "COMPONENT INSPECTION ".

OK or NG

OK: GO TO 11.

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

OK or NG

OK: Replace IPDM E/R.

NG: Repair or replace harness or connectors.