Diagnostic Procedure

Turn ignition switch to START.

Is any cylinder ignited? 

Yes or No 

Yes (With CONSULT-II): GO TO 2.

Yes (Without CONSULT-II): GO TO  3.

No: GO TO  7.

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: Consult-II ACTIVE TEST Display Screen

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

OK or NG 

OK: INSPECTION END 

NG: GO TO  7.

Without CONSULT-II 

1. Stop engine.
2. Disconnect harness connector F29, F201.
3. Turn ignition switch ON.
   Fig 2: Disconnecting Harness Connector F29, F201

   Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check voltage between harness connector F29 terminal 5 and ground with CONSULT-II or tester.

   Voltage: Battery voltage 

5. Turn ignition switch OFF.
6. Disconnect ECM harness connector.
7. Check harness continuity between harness connector F29 terminals and ECM terminals as follows.

   Refer to WIRING DIAGRAM .

   Fig 3: Checking Voltabe Between Harness Connector Terminal 5 And Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.
   CYLINDER HARNESS SPECIFICATIONS
   
   

   Cylinder	Harness connector F29 terminal	ECM terminal
   1	6	23
   3	2	22
   5	1	21

   Continuity should exist. 

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

OK or NG 

OK: GO TO  5.

NG: GO TO 4.

Check the following.

• Harness connectors M82, F102
• Fuse block (J/B) connector M1
• 10A fuse
• Harness for open or short between harness connector F29 and fuse
• Harness for open or short between harness connector F29 and ECM

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

Provide battery voltage between harness connector F201 as follows and then interrupt it. Listen to each fuel injector operating sound.

Fig 4: Checking Function Of Fuel Injector-II

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

Operating sound should exist. 

OK or NG 

OK: GO TO 6.

NG: GO TO  7.

1. Reconnect all harness connector disconnected.
2. Start engine.
3. Listen to fuel injectors No. 2, No. 4, No. 6 operating sound.

Clicking noise should exist. 

OK or NG 

OK: INSPECTION END 

NG: GO TO 7.

Fig 5: Checking Fuel Injector For Audible Clicking

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

1. Turn ignition switch OFF.
2. Disconnect fuel injector harness connector.
   Fig 6: Checking Fuel Injector Power Supply Circuit

   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-II or tester.

Voltage: Battery voltage 

OK or NG 

OK: GO TO  9.

NG: GO TO 8.

Fig 7: Checking Voltage Between Fuel Injector Terminal 1 And Ground

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

Check the following.

• Harness connectors M82, F102
• Harness connectors F201, F29
• Fuse block (J/B) connector M1
• 10A fuse
• Harness for open or short between fuel injector and fuse

: Repair 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 21, 22, 23, 40, 41, 42. 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  11.

NG: GO TO 10.

Check the following.

• Harness connectors F29, F201
• Harness for open or short between fuel injector and ECM

: 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 12.

NG: Replace fuel injector.

Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

: INSPECTION END