Diagnostic Procedure

WARNING: This page is about a different car, the 2006 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.

INSPECTION START
Turn ignition switch to START.

Is any cylinder ignited?

Yes or No

Yes: GO TO 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.
3. Make sure that each circuit produces a momentary engine speed drop.
  
  Fig 1: Consult-II ACTIVE TEST Display Screen
  Courtesy of NISSAN MOTOR CO., U.S.A.
Without CONSULT-II
1. Start engine.
2. Listen to each fuel injector operating sound.
  Clicking noise should be heard.
  
  Fig 2: Checking Fuel Injector For Audible Clicking
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK: INSPECTION END

NG: GO TO 3.
CHECK FUEL INJECTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect fuel injector harness connector.
  
  Fig 3: Identifying Fuel Injector Harness Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Turn ignition switch ON.
4. Check voltage between fuel injector terminal 1 and ground with CONSULT-II or tester.
  Voltage: Battery voltage
OK or NG

OK: GO TO 5.

NG: GO TO 4.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E2, F32
- IPDM E/R connector E119
- 15A fuse
- Harness for open or short between fuel injector and fuse
  : Repair harness or connectors.
CHECK FUEL INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between fuel injector terminal 2 and ECM terminals 21, 22, 23, 40, 41, 42, 44, 63.
  Refer to WIRING DIAGRAM .
  
  Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG

OK: GO TO 6.

NG: Repair open circuit or short to ground or short to power in harness or connectors.
CHECK FUEL INJECTOR
Refer to "DIAGNOSTIC PROCEDURE ".

OK or NG

OK: GO TO 7.

NG: Replace fuel injector.
CHECK INTERMITTENT INCIDENT
Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

: INSPECTION END