Diagnosis Procedure

Turn ignition switch to START.

Are any cylinders ignited? 

Yes or No 

Yes: GO TO 2.

No: GO TO  3.

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.

Operating sound should exist  .

OK or NG 

OK: INSPECTION END 

NG: GO TO 3.

Fig 1: Checking Fuel Injector Operating Sound

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

1. Turn ignition switch OFF.
2. Disconnect fuel injector harness connectors.
   Fig 2: Identifying Fuel Injector Harness Connectors

   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 

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.

Check the following.

• Harness connectors M72, F102
• Fuse block (J/B) connector M4
• 15 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 ECM terminals 21, 22, 23, 40, 41, 42, 44, 63 and fuel injector terminal 2. Refer to SYSTEM WIRING DIAGRAMS article.

   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 malfuncioning fuel injector.

Refer to "DIAGNOSIS PROCEDURE ".

INSPECTION END