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  3.

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.

OK or NG 

OK : INSPECTION END 

NG : GO TO 3.

Fig 1: Consult-II ACTIVE TEST Display Screen

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

1. Turn ignition switch OFF.
2. Disconnect harness connector F21, F201 (bank 1) and F41, F221 (bank 2).
   Fig 2: Identifying Harness Connector F21, F201 (Bank 1) And F41, F221 (Bank 2)

   Courtesy of NISSAN MOTOR CO., U.S.A.
3. Turn ignition switch ON.
4. Check voltage between the following;

   harness connector F21 terminal 5 and ground,

   harness connector F41 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 the following terminals.
   Fig 3: Identifying Voltage Between Harness Connector F21 Terminal 5 And Ground And Harness Connector F41 Terminal 5 And Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.
   HARNESS CONNECTOR TERMINAL REFERENCE
   
   

   Cylinder	Harness connector terminal	ECM terminal
   1	F21 terminal 3	23
   3	F21 terminal 2	22
   5	F21 terminal 1	21
   7	F21 terminal 6	44
   2	F41 terminal 3	42
   4	F41 terminal 2	41
   6	F41 terminal 1	40
   8	F41 terminal 6	63

   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
• Harness connectors F21, F201
• Harness connectors F41, F221
• Fuse block (J/B) connector M1
• 15A fuse
• Harness for open or short between harness connector F21 and fuse
• Harness for open or short between harness connector F41 and fuse
• Harness for open or short between harness connector F21 and ECM
• Harness for open or short between harness connector F41 and ECM

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

Provide battery voltage between the following terminals, and then interrupt it. Listen to each fuel injector operating sound.

Operating sound should exist. 

Fig 4: Identifying Function Of Fuel INJECTOR-II

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

OK or NG 

OK : INSPECTION END 

NG : GO TO 6.

1. Disconnect fuel injector harness connectors.
   Fig 5: Identifying Fuel Injector

   Courtesy of NISSAN MOTOR CO., U.S.A.
2. Check harness continuity between the following terminals. Refer to Wiring Diagram.
   HARNESS CONNECTOR TERMINAL REFERENCE
   
   

   Harness connector terminal	Fuel injector terminal
   F201 terminal 1	2
   F201 terminal 2
   F201 terminal 3
   F201 terminal 6
   F201 terminal 5	1
   F221 terminal 1	2
   F221 terminal 2
   F221 terminal 3
   F221 terminal 6
   F221 terminal 5	1

   Continuity should exist. 

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

OK or NG 

OK : GO TO 7.

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 8.

NG : Replace fuel injector.

Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

: INSPECTION END