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Home >> Nissan-Datsun >> 2003 >> Sentra SE-R, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 367 (2004 - Engine Control System - Coupe) >> DTC P0420, P0430: Three Way Catalyst Function >> Diagnostic Procedure >> 5. Check Injectors

5. Check 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.
  1. Stop engine and then turn ignition switch ON.
  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 .

    1. Battery voltage should exist. 

OK or NG 

OK: GO TO 6.

NG: Perform "Diagnostic Procedure ".

Fig 1: Checking Injectors
G00724099Courtesy of NISSAN MOTOR CO., U.S.A.