Diagnostic Procedure

Turn ignition switch to START.

Is any cylinder ignited? 

Yes or No 

1. Yes (With CONSULT-II): GO TO 2.
2. Yes (Without CONSULT-II): GO TO  3.
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 

1. OK: INSPECTION END 
2. NG: GO TO 3.

Fig 1: Display Active Test Mode

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: Locating 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

   1. Voltage: Battery voltage 
   Fig 3: Checking Voltage Between Harness Connector F21 And F41 Terminals

   Courtesy of NISSAN MOTOR CO., U.S.A.
5. Turn ignition switch OFF.
6. Disconnect ECM harness connector.
7. Check harness continuity between the following terminals.
   HARNESS CONTINUITY CHECKING TERMINALS REFERENCE
   
   

   Cylinder	Harness connector terminal	ECM terminal
   1	F21terminal3	23
   3	F21 terminal2	22
   5	F21 terminal1	21
   7	F21 terminal6	44
   2	F41 terminal3	42
   4	F41 terminal2	41
   6	F41 terminal1	40
   8	F41 terminal6	63

   1. Continuity should exist. 
8. Also check harness for short to ground and short to power.

OK or NG 

1. OK: GO TO  5
2. NG: GO TO 4.

Check the following.

• Harness connectors E32, F32
• Harness connectors F21, F201
• Harness connectors F41, F221
• Fuse block (J/B) No. 1 connector M1
• Fuse block (J/B) No. 2 connectors M143, E215
• 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
  1. 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 injector operating sound.

Fig 4: Terminals Reference Chart For Providing Battery Voltage

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

Fig 5: Checking Injector Operating Sound

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

1. Operating sound should exist. 

OK or NG 

1. OK: INSPECTION END
2. NG: GO TO 6.

1. Disconnect injector harness connectors.
   Fig 6: Locating Injector Harness Connectors

   Courtesy of NISSAN MOTOR CO., U.S.A.
2. Check harness continuity between the following terminals. Refer to WIRING DIAGRAM .
   Fig 7: Terminals Reference Chart For Harness Continuity Checking

   Courtesy of NISSAN MOTOR CO., U.S.A.
   1. Continuity should exist. 

OK or NG 

1. OK: GO TO 7
2. NG: Repair open circuit or short to ground or short to power in harness or connectors.

Refer to "COMPONENT INSPECTION ".

OK or NG 

1. OK: GO TO 8.
2. NG: Replace injector

Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

1. : INSPECTION END