Diagnostic Procedure

WARNING: This page is about a different car, the 2005 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

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.
  
  Fig 1: Pinching Fuel Feed Hose With Two Fingers
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: INSPECTION END
2. 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 113 and ground with CONSULT-II or tester.
  Voltage: Battery voltage
  
  Fig 2: Checking Voltage Between ECM Terminal 113 And Ground With CONSULT-II Or Tester
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 5.
2. NG: GO TO 3.
CHECK FUEL PUMP POWER SUPPLY CIRCUIT-I
1. Turn ignition switch ON.
2. Check voltage between IPDM E/R terminal 40 and ground with CONSULT-II or tester.
  Voltage: Battery voltage
  
  Fig 3: Checking Voltage Between IPDM E/R Terminal 40 And Ground With CONSULT-II Or Tester
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 4.
2. NG: GO TO 13.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E11, F2
- Harness for open or short between IPDM E/R and ECM
1. : Repair open circuit or short to ground or short to power in harness or connectors.
CHECK CONDENSER POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Disconnect condenser harness connector.
4. Turn ignition switch ON.
5. Check voltage between condenser 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.
  
  Fig 4: Checking Voltage Between Condenser Terminal 1 And Ground With CONSULT-II Or Tester
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 9.
2. NG: GO TO 6.
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 POWER SUPPLY CIRCUIT-II
1. Disconnect IPDM E/R harness connector E8.
2. Check harness continuity between IPDM E/R terminal 39 and condenser 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: GO TO 8.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E106, B2
- Harness for open or short between IPDM E/R and condenser
1. : Repair open circuit or short to ground or short to power in harness or connectors.
CHECK CONDENSER GROUND CIRCUIT
1. Check harness continuity between condenser 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 10.
2. NG: Repair open circuit or short to power in harness or connectors.
CHECK CONDENSER
Refer to "Component Inspection ".

OK or NG
1. OK: GO TO 11.
2. NG: Replace condenser.
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 harness connectors E106, B2.
4. Check harness continuity between the following;
  "fuel level sensor unit and fuel pump" terminal 1 and harness connector B2 terminal 18,
  
  "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 5: Checking Harness Continuity Between Fuel Level Sensor Unit And Fuel Pump
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 12.
2. NG: 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 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.