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Home >> Nissan-Datsun >> 2004 >> Frontier Base, Automatic >> Repair and Diagnosis >> Engine Performance >> Engine Control System - KA24DE >> DTC P0420: Three Way Catalyst Function >> DTC Confirmation Procedure >> Testing Condition: >> With CONSULT-II
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With CONSULT-II

  1. Start engine and warm it up to the normal operating temperature.
  2. Turn ignition switch OFF and wait at least 5 seconds.
  3. Start engine and keep the engine speed between 3,500 and 4,000 RPM for at least 1 minute under no load.
  4. Let engine idle for 1 minute.
  5. Select "DTC & SRT CONFIRMATION" then "SRT WORK SUPPORT" mode with CONSULT-II.
  6. 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 "COMPLT", go to step  9

  7. Wait 5 seconds at idle.
    Fig 1: Scan Tool Display
    G00854618Courtesy of NISSAN MOTOR CO., U.S.A.
  8. 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", perform the following.

    1. Turn ignition switch OFF and leave the vehicle in a cool place (soak the vehicle).
      Fig 2: Scan Tool Display
      G00854619Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Turn ignition switch ON and select "COOLAN TEMP/S" in "DATA MONITOR" mode with CONSULT-II.
    3. Start engine and warm it up while monitoring "COOLAN TEMP/S" indication on CONSULT-II.
    4. When "COOLAN TEMP/S" indication reaches to 70°C (158°F), go to step 3.
      Fig 3: Scan Tool Display - Data Monitor
      G00854620Courtesy of NISSAN MOTOR CO., U.S.A.
  9. Select "SELF-DIAG RESULTS" mode with CONSULT-II.
  10. Confirm that the 1st trip DTC is not detected.

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

Fig 4: Scan Tool Display - Self Diag Results
G00854621Courtesy of NISSAN MOTOR CO., U.S.A.