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Home >> Mazda >> 2002 >> 626 ES, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 2.5L >> Self-Diagnostic System >> Drive Modes >> HO2S/TWC Monitor Repair Verification Drive Mode
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HO2S/TWC Monitor Repair Verification Drive Mode

NOTE: Intake Air Temperature (IAT) PID must be less than 169°F (76°C) to start HO2S/TWC monitor. Fuel level (FLI) PID must be more than 15 percent to start HO2S/TWC monitor. Monitor implement waiting condition will start 5 minutes after engine start. After monitoring conditions are set, system testing requires 30 seconds or more to complete.
  1. Connect scan tool. Start engine and allow it to reach operating temperature. Ensure Engine Coolant Temperature (ECT) PID is 176-239°F (80-115°C). Drive vehicle at a constant speed of 30-127 MPH for at least 2 minutes. Stop vehicle and allow to idle for at least 20 seconds.
  2. Using scan tool, check drive mode completion status. If drive mode is not completed, turn ignition off. Repeat procedure again. If drive mode is completed, go to next step.
  3. Using scan tool, check values. If values are within specification, verify no DTCs are present. Repair is complete. If values are not within specification, repair is not complete.
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