Mode 3 (HO2S heater, HO2S, and TWC Repair Verification Drive Mode)

2010 Mazda 5 Sport, 2.3 L, StandardSECTION Mode 3 (HO2S heater, HO2S, and TWC Repair Verification Drive Mode)
  1. Perform "PCM Adaptive Memory Produce Drive Mode" first.
  2. Verify that all accessory loads (A/C, headlights, blower fan, rear window defroster) are off.
  3. Drive the vehicle as shown in the graph. The driving condition before driving at constant speed driving is not specified.
  4. Stop the vehicle and access to ONBOARD 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, turn the ignition key off then repeat from StepΒ 3.
  5. Access DIAGNOSTIC MONITORING TEST RESULTS menu of GENERIC OBD II
    • If detected values are not within specification, repair has not been completed.
  6. Verify no DTCs are available.
    Fig 1: Vehicle Drive Graph (Mode 3)
    G00992220Courtesy of MAZDA MOTORS CORP.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.