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 connectors F221 (1), F33 (2).
   • <-: Vehicle front
   • Cylinder head (bank 2) (3)
3. Turn ignition switch ON.
   Fig 2: Identifying Harness Connectors F221 (1) And F33 (2)

   Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check voltage between harness connector F33 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.
   FUNCTION OF FUEL INJECTOR-I
   
   

   Cylinder	Harness connector F33 terminal	ECM terminal
   1	6	23
   2	4	42
   3	2	22
   4	3	41
   5	1	21
   6	7	40

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

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

   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 M72, F102
• Harness connectors F33, F221
• Fuse block (J/B) connector M4
• 15A fuse
• Harness for open or short between harness connector F33 and fuse
• Harness for open or short between harness connector F33 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: Checking 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 connector (1).
   Fig 5: Identifying Fuel Injector Harness Connector (1)

   Courtesy of NISSAN MOTOR CO., U.S.A.
2. Check harness continuity between the following terminals. Refer to Wiring Diagram .
   SUB-HARNESS CIRCUIT FOR OPEN AND SHORT
   
   

   Harness connector F221 terminal	Fuel injector terminal
   1	2
   2
   3
   4
   6
   7
   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