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Home >> Infiniti >> 2004 >> FX45 >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> DTC P0420 & P0430 Three Way Catalyst Function >> DTC confirmation procedure >> Testing Condition
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Testing Condition

Do not hold engine speed for more than the specified minutes below  .

  1. Turn ignition switch ON and select DATA MONITOR mode with CONSULT-II. See Figure .
  2. Start engine and warm it up to the normal operating temperature.
  3. Turn ignition switch OFF and wait at least 10 seconds.
  4. Start engine and keep the engine speed between 3,500 and 4,000 RPM for at least 1 minute under no load.
  5. Let engine idle for 1 minute.
  6. Make sure that COOLANT TEMP/S indicates more than 70° C (158° F).

    If not, warm up engine and go to next step when COOLANT TEMP/S indication reaches to 70° C (158° F).

  7. Open engine hood.
  8. Select DTC & SRT CONFIRMATION then SRT WORK SUPPORT mode with CONSULT-II.
  9. Rev engine up to 2,000 to 3,000 RPM and hold it for 3 consecutive minutes then release the accelerator pedal completely.

    If INCMP of CATALYST changed to CMPLT , go to step  12 .

  10. Wait 5 seconds at idle.
    Fig 1: Initiating SRT Work Support Mode (CONSULT-II)
    G00344934Courtesy of NISSAN MOTOR CO., U.S.A.
  11. Rev engine up to 2,000 to 3,000 RPM and maintain it until INCMP of CATALYST changes to CMPLT (It will take approximately 5 minutes).

    If not CMPLT , stop engine and cool it down to less than 70° C (158° F) and then retest from step  1 .

    Fig 2: Confirming Catalyst Complete In SRT Work Support Mode (CONSULT-II)
    G00344935Courtesy of NISSAN MOTOR CO., U.S.A.
  12. Select SELF-DIAG RESULTS mode with CONSULT-II.
  13. Confirm that the 1st trip DTC is not detected.

    If the 1st trip DTC is detected, go to DIAGNOSTIC PROCEDURE  .

    Fig 3: Displaying DTC Results In Self Diagnostic Mode (CONSULT-II)
    G00344936Courtesy of NISSAN MOTOR CO., U.S.A.