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Home >> Infiniti >> 2010 >> M45 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0171 To P0456 >> DTC P0420, P0430 Three Way Catalyst Function >> DTC Confirmation Procedure
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DTC Confirmation Procedure

NOTE: If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
  1. Turn ignition switch OFF and wait at least 10 seconds.
  2. Turn ignition switch ON.
  3. Turn ignition switch OFF and wait at least 10 seconds.

WITH CONSULT-III

TESTING CONDITION: 

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

  1. Start engine and warm it up to normal operating temperature.
  2. Turn ignition switch OFF and wait at least 10 seconds.
  3. Turn ignition switch ON.
  4. Turn ignition switch OFF and wait at least 10 seconds.
  5. Start engine and keep the engine speed between 3, 500 and 4, 000 RPM for at least 1 minute under no load.
  6. Let engine idle for 1 minute.
  7. Select "COOLAN TEMP/S" in "DATA MONITOR" mode with CONSULT-III.
  8. Check that "COOLAN TEMP/S" indication is more than 70°C (158°F).

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

  9. Open engine hood.
  10. Select "DTC & SRT CONFIRMATION" then "SRT WORK SUPPORT" mode with CONSULT-III.
  11. Rev engine between 2, 000 and 3, 000 RPM and maintain that speed for 3 consecutive minutes, then release the accelerator pedal completely.

    If "INCMP" of "CATALYST" changed to "CMPLT", go to step 14.

  12. Wait 5 seconds at idle.
  13. Rev engine between 2, 000 and 3, 000 RPM and maintain that speed 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.

  14. Check 1st trip DTC.
  15. If 1st trip DTC is detected, go to "DIAGNOSIS PROCEDURE ".