Diagnosis Procedure

INSPECTION START
Turn ignition switch to START.

Is any cylinder ignited?

Yes or No

Yes: GO TO 2.

No: GO TO 3.
CHECK OVERALL FUNCTION
With CONSULT-III
1. Start engine.
2. Perform "POWER BALANCE" in "ACTIVE TEST" mode with CONSULT-III.
3. Check that each circuit produces a momentary engine speed drop.
Without CONSULT-III
1. Start engine.
2. Listen to each fuel injector operating sound.
  Clicking noise should be heard .
  
  OK or NG
  
  OK: INSPECTION END
  
  NG: GO TO 3.
  
  Fig 1: Checking Fuel Injector
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK FUEL INJECTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect fuel injector harness connector (1).
  - <=: Vehicle front
3. Turn ignition switch ON.
  
  Fig 2: Identifying Fuel Injector Harness Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check voltage between fuel injector terminal 1 and ground with CONSULT-III or tester.
  Voltage: Battery voltage
  
  OK or NG
  
  OK: GO TO 5.
  
  NG: GO TO 4.
  
  Fig 3: Checking Voltage Between Fuel Injector Terminal 1 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E3, F2
- 10A fuse
- Harness for open or short between fuel injector and fuse
  Repair open circuit or short to ground or short to power in harness or connectors.
CHECK FUEL INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between fuel injector terminal 2 and ECM terminals 29, 30, 31, 32.
  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 6.
  
  NG: Repair open circuit or short to ground or short to power in harness or connectors.
CHECK FUEL INJECTOR
Refer to "COMPONENT INSPECTION ".

OK or NG

OK: GO TO 7.

NG: Replace malfunctioning fuel injector.
CHECK INTERMITTENT INCIDENT
Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

INSPECTION END