Mode 03 (EGR System, A/F Sensor Heater, HO2S Heater, A/F Sensor, HO2S and TWC Repair Verification Drive Mode)

Start the engine and warm it up completely.
Verify all accessory loads (A/C, headlights, blower fan, rear window defroster) are off.
Drive the vehicle as shown in the graph. The driving conditions before driving at constant speed are not specified.

Fig 1: Vehicle Speed Graph - Mode 3
Courtesy of MAZDA MOTORS CORP.
Stop the vehicle and access the ON BOARD SYSTEM READINESS menu of GENERIC OBD-II FUNCTION to verify the OBD monitoring status.
- If completed, the OBD monitoring status items change from non-completed to completed.
- If not completed, switch the ignition to off then repeat from Step 3.
Access the DIAGNOSTIC MONITORING TEST RESULTS menu of GENERIC OBD-II FUNCTIONS to verify the monitor results.
- If detected values are not within the specification, repair has not been completed.
Verify no DTCs are available.