LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Nissan-Datsun >> 2003 >> Sentra SE-R, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 367 (2004 - Engine Control System - Coupe) >> DTC P0171, P0174: Fuel Injection System Function >> Diagnostic Procedure >> 7. Check Function Of Injectors
April 5, 2026: LEMON Manuals is launched! Read the announcement.

7. Check Function Of Injectors

WARNING: This page is about a different car, the 2004 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

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 Display Screen
    G00723994Courtesy of NISSAN MOTOR CO., U.S.A.

Without CONSULT-II 

  1. Start engine.
  2. Listen to each injector operating sound.
    1. Clicking noise should be heard. 
    Fig 2: Check Function Of Injectors (Without CONSULT-II)
    G00723995Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

OK: GO TO 8.

NG: Perform trouble diagnosis for "INJECTOR CIRCUIT ".