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 F52, F251 (bank 1) and F51, F271 (bank 2).
   Fig 2: Identifying Harness Connectors F52, F251 (Bank 1) And F51, F271 (Bank 2)

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

   harness connector F52 terminal 5 and ground,

   harness connector F51 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: Checking Voltage Between Harness Connector F52 Terminal 5 And Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.
   ECM TERMINAL CHART
   
   

   Cylinder	Harness connector terminal	ECM terminal
   1	F52 terminal 3	23
   3	F52 terminal 2	22
   5	F52 terminal 1	21
   7	F52 terminal 6	44
   2	F51 terminal 3	42
   4	F51 terminal 2	41
   6	F51 terminal 1	40
   8	F51 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 M72, F102
• Harness connectors F52, F251
• Harness connectors F51, F271
• Fuse block (J/B) connector M4
• 15A fuse
• Harness for open or short between harness connector F51 and fuse
• Harness for open or short between harness connector F52 and fuse
• Harness for open or short between harness connector F51 and ECM
• Harness for open or short between harness connector F52 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. 

OK or NG 

OK: INSPECTION END 

NG: GO TO 6.

Fig 4: Providing Battery Voltage Between Terminals

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

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

   Courtesy of NISSAN MOTOR CO., U.S.A.
2. Check harness continuity between the following terminals. Refer to Wiring Diagram .
   FUEL INJECTOR TERMINAL CHART
   
   

   Harness connector terminal	Fuel injector terminal
   F251 terminal 1	2
   F251 terminal 2
   F251 terminal 3
   F251 terminal 6
   F251 terminal 5	1
   F271 terminal 1	2
   F271 terminal 2
   F271 terminal 3
   F271 terminal 6
   F271 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