Diagnostic Procedure

INSPECTION START
Turn ignition switch to START.

Is any cylinder ignited?

Yes or No
1. Yes: GO TO 2.
2. No: GO TO 3 .
CHECK OVERALL FUNCTION
With CONSULT-II
1. Start engine.
2. Perform POWER BALANCE in ACTIVE TEST mode with CONSULT-II.
  
  Fig 1: Displaying CONSULT-II ACTIVE TEST Screen
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Make sure that each circuit produces a momentary engine speed drop.
Without CONSULT-II
1. Start engine.
2. Listen to each injector operating sound.
Clicking noise should be heard.

OK or NG
1. OK: INSPECTION END
2. NG: GO TO 3.
CHECK INJECTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect injector harness connectors (bank 2) and harness connectors F58, F197 (bank 1).
  
  Fig 2: Identifying Harness Connectors F58 And F197 (Bank 1)
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 3: Identifying Injector Harness Connector (Bank 2)
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Turn ignition switch ON
4. Check voltage between injector terminal 1 and ground, harness connector F58 terminal 5 and ground with CONSULT-II or tester.
  
  Fig 4: Checking Voltage Between Terminals And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 5 .
2. NG: GO TO 4.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors M229, F66
- Harness connectors F56, F197
- Fuse block (J/B) connector M19
- 10A fuse
- Harness for open or short between injector and fuse
- Harness for open or short between harness connector F58 and fuse
1. : Repair harness or connectors.
CHECK INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between injector terminal 2 and ECM terminals 2, 11, 13, harness connector F58 terminals 6, 2, 1 and ECM terminals 1, 3, 12.
  Refer to Wiring Diagram.
  
  Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
1. OK: GO TO 7 .
2. NG: GO TO 6.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors F56, F197
- Harness for open or short between harness connector F58 and ECM
- Harness for open or short between ECM and injector
1. : Repair open circuit or short to ground or short to power in harness or connectors.
CHECK SUB-HARNESS CIRCUIT FOR OPEN AND SHORT (BANK 1)
1. Remove intake manifold collector.
2. Disconnect injector harness connectors (Bank 1).
3. Check harness continuity between the following terminals. Refer to Wiring Diagram.
  
  Fig 5: Displaying Harness Continuity Between Terminals
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
1. OK: GO TO 8.
2. NG: Repair open circuit or short to ground or short to power in harness or connectors.
CHECK INJECTOR
1. Disconnect injector harness connector.
2. Check resistance between terminals as shown in Fig 6 .
  
  Fig 6: Checking Resistance Between Terminals
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 9.
2. NG: Replace injector.
CHECK INTERMITTENT INCIDENT
Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .
1. : INSPECTION END