Diagnosis Procedure

Turn ignition switch to START.

Is any cylinder ignited? 

Yes or No 

Yes: GO TO 2.

No: GO TO  2.

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  .

   Fig 1: Checking Fuel Injector Operating Sound

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

   OK or NG 

   OK: INSPECTION END 

   NG: GO TO 3.

1. Turn ignition switch OFF.
2. Disconnect fuel injector harness connector (1).
   • : Vehicle front
   Fig 2: Location Of Fuel Injector Harness Connector

   Courtesy of NISSAN MOTOR CO., U.S.A.
3. Turn ignition switch ON.
4. Check voltage between fuel injector terminal 1 and ground with CONSULT-III or tester.

   Voltage: Battery voltage 

   Fig 3: Checking Voltage Between Fuel Injector Terminal 1 And Ground

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

   OK or NG 

   OK: GO TO  5.

   NG: GO TO 4.

Check the following.

• Harness connectors E3, F2
• 10 A 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.

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.

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 7.

NG: Replace malfunctioning fuel injector. Refer to "REMOVAL AND INSTALLATION ".

Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

INSPECTION END