Diagnostic Procedure

With CONSULT-II 

1. Start engine.
2. Perform "POWER BALANCE" in "ACTIVE TEST" mode with CONSULT-II.
3. Make sure that each circuit produces a momentary engine speed drop.
   Fig 1: Scan Tool Display - Active Test

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

Without CONSULT-II 

1. Start engine.
2. Listen to each injector operating sound.

   Clicking noise should be heard. 

   Fig 2: Listening For Fuel Injector Operational Sound

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

OK or NG 

1. OK: INSPECTION END 
2. NG: GO TO 2.

1. Stop engine.
2. Disconnect injector harness connector.
3. Turn ignition switch ON.
4. Check voltage between injector terminal 1 and ground with CONSULT-II or tester.
   Fig 3: Checking Voltage Between Injector Terminal 1 And Ground With CONSULT-II Or Tester

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

   Voltage : Battery voltage 

OK or NG 

1. OK: GO TO  4.
2. NG: GO TO 3.

Check the following.

• Harness connectors F27, M59
• Fuse block (J/B) connector M26
• 10A fuse
• Harness for open or short between injector and fuse

  Repair harness or connectors.

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between injector terminal 2 and ECM terminals 102, 104, 109, 111.

   Refer to WIRING DIAGRAM .

   Continuity should exist. 

4. Also check harness for short to ground and short to power.

OK or NG 

1. OK: GO TO  6.
2. NG: GO TO 5.

Check the harness for open or short between ECM and injector.

Repair open circuit or short to ground or short to power in harness or connectors.

1. Disconnect injector harness connector.
2. Check resistance between terminals as shown in the figure.

   Resistance : 7.3 - 9.9Ω [at 25°C (77°F)] 

Fig 4: Checking Injector Resistance Between Terminals

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

OK or NG 

1. OK: GO TO 7.
2. NG: Replace injector.

Perform , "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

INSPECTION END