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Home >> Infiniti >> 2004 >> Q45 >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> DTC P0420, P0430: Three Way Catalyst Function >> Diagnostic Procedure >> 5. Check Injectors

5. Check Injectors

  1. Stop engine and then turn ignition switch ON.
  2. Check voltage between ECM terminals 5, 6, 7,13,14,15,16,17 and ground with CONSULT-II or tester.
    1. Voltage: Battery voltage 
    Fig 1: Checking voltage between ECM terminals 5, 6, 7,13,14,15,16,17 & ground
    G00760901Courtesy of NISSAN MOTOR CO., U.S.A.
  3. Refer to Wiring Diagram for Injectors, Wiring Diagram  .

OK or NG 

OK : GO TO 6.

NG : Perform Diagnostic Procedure  .