LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Nissan-Datsun >> 2004 >> Maxima SL, RE4F04B >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTC >> DTC P0420, P0430: Three Way Catalyst Function >> Diagnostic Procedure >> 5. Check Injectors
April 5, 2026: LEMON Manuals is launched! Read the announcement.

5. Check Injectors

  1. Let engine idle.
  2. Check voltage between ECM terminals 21, 22, 23, 40, 41, 42 and ground with CONSULT-II or tester.

    Refer to WIRING DIAGRAM for Injectors, WIRING DIAGRAM .

    For system wiring diagrams, see SYSTEM WIRING DIAGRAMS .

    1. Battery voltage should exist. 

OK or NG 

  1. OK: GO TO 6.
  2. NG: Perform "DIAGNOSTIC PROCEDURE ".
Fig 1: Checking Voltage
G00874657Courtesy of NISSAN MOTOR CO., U.S.A.