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Home >> Infiniti >> 2003 >> FX45 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0420: Catalyst System Efficiency Below Threshold (Bank 1) Or DTC P0430: Catalyst System Efficiency Below Threshold (Bank 2) >> DTC Confirmation Test (Using CONSULT-II)

DTC Confirmation Test (Using CONSULT-II)

NOTE: DO NOT keep engine at specified speeds longer than the specified times.
  1. Turn ignition switch on. Select DATA MONITOR mode.
  2. Start engine and warm it up to normal operating temperature.
  3. Turn ignition switch off and wait at least 10 seconds. Start engine and keep engine speed between 3500 and 4000 RPM for at least one minute under no load. Make sure that COOLAN TEMP/S indicates more than 158°F (70°C). If not to specification, keep warming engine until it reaches 158°F (70°C).
  4. Open engine hood. Select DTC & SRT CONFIRMATION then SRT WORK SUPPORT mode. Raise engine speed to 2000-3000 RPM for 3 consecutive minutes. Release accelerator pedal completely. If INCMP of CATALYST changed to CMPLT, go to step  7 .
  5. Let engine idle for 5 seconds, then hold engine speed at 2000-3000 RPM until INCMP of CATALYST changes to CMPLT (it will take about 5 minutes).
  6. If CMPLT is not displayed, stop engine and cool to less than 158°F (70°C), then retest from step  1 .
  7. Select SELF-DIAG RESULTS mode with CONSULT-II.
  8. If 1st trip DTC is detected, go to DIAGNOSTIC PROCEDURE  . If 1st trip DTC is not detected, system is okay at this time.
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