Nissan Sentra manuals

Nissan Sentra Service Manual: Fuel injector

Component Function Check

1.INSPECTION START

Turn ignition switch to START.

Is any cylinder ignited? YES >> GO TO 2.

NO >> Proceed to EC-450, "Diagnosis Procedure".

2.CHECK FUEL INJECTOR FUNCTION

With CONSULT


  1. Start engine.
  2. Perform “POWER BALANCE” in “ACTIVE TEST” mode of “ENGINE” using CONSULT.
  3. Check that each circuit produces a momentary engine speed drop

Without CONSULT


  1. Let engine idle.
  2. Listen to each fuel injector operating sound.

Clicking noise should be heard.

Is the inspection result normal?


Is the inspection result normal? YES >> INSPECTION END

NO >> Proceed to EC-450, "Diagnosis Procedure".

Diagnosis Procedure

1.CHECK FUSE

  1. Turn ignition switch OFF.
  2. Pull out #52 fuse and check that the fuse is not fusing.

Is the inspection result normal? YES >> GO TO 2.

NO >> Replace the fuse after repairing the applicable circuit.

2.CHECK FUEL INJECTOR POWER SUPPLY

  1. Insert the fuse which pulled out.
  2. Disconnect fuel injector harness connector.
  3. Turn ignition switch ON.
  4. Check the voltage between fuel injector harness connector and ground.

Is the inspection result normal?


Is the inspection result normal? YES >> GO TO 4.

NO >> GO TO 3.

3.CHECK FUEL INJECTOR POWER SUPPLY CIRCUIT

  1. Turn ignition switch OFF.
  2. Disconnect IPDM E/R harness connector.
  3. Check the continuity between fuel injector harness connector and IPDM E/R harness connector


  1. Also check harness for short to ground.

Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-39, "Intermittent Incident".

NO >> Repair or replace error-detected parts.

4.CHECK FUEL INJECTOR CONTROL CIRCUIT

  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector.
  3. Check the continuity between fuel injector harness connector and ECM harness connector.


  1. Also check harness for short to ground and to power.

Is the inspection result normal? YES >> GO TO 5.

NO >> Repair or replace error-detected parts

5.CHECK FUEL INJECTOR

Check the fuel injector. Refer to EC-451, "Component Inspection (Fuel Injector)".

Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-39, "Intermittent Incident" NO >> Replace malfunctioning fuel injector. Refer to EM-40, "Removal and Installation".

Component Inspection (Fuel Injector)

1.CHECK FUEL INJECTOR

  1. Turn ignition switch OFF.
  2. Disconnect fuel injector harness connector.
  3. Check resistance between fuel injector terminals as per the following.

Is the inspection result normal?


Is the inspection result normal? YES >> INSPECTION END

NO >> Replace malfunctioning fuel injector. Refer to EM-40, "Removal and Installation"

ASCD Indicator
Component Function Check 1.CHECK ASCD INDICATOR FUNCTION Check ASCD indicator under the following conditions. ASCD INDICATOR CONDITION SPECIFICATION CRUISE LAMP Ig ...

Fuel pump
Component Function Check 1.CHECK FUEL PUMP FUNCTION Turn ignition switch ON. Pinch fuel feed hose with two fingers. Fuel pressure pulsation should be felt on the fuel feed hose for ...

Other materials:

Rear power window motor
Removal and Installation REMOVAL Remove the rear door glass regulator (1). Refer to GW-21, "Removal and Installation" Remove the screws and the rear power window motor (2). INSTALLATION Installation is in the reverse order of removal. ...

Ecu diagnosis information
BCM Reference value Note: The signal tech ii tool (j-50190) can be used to perform the following functions. Refer to the signal tech ii user guide for additional information. Activate and display tpms transmitter ids Display tire pressure reported by the tpms transmitter Read TPMS DTCs ...

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. Information necessary to service the system ...

© 2014-2021 Copyright www.nisentra.com