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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
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

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.