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Home >> Mazda >> 2002 >> MX-5 Miata L4-1.8L DOHC >> Repair and Diagnosis >> Powertrain Management >> Emission Control Systems >> Testing and Inspection >> Mode 3(HO2S Heater,HO2S,and TWC Repair Verification Drive Mode)
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Mode 3(HO2S Heater,HO2S,and TWC Repair Verification Drive Mode)

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

1. Perform Mode 1 first.
2. Verify all accessory loads (A/C, headlights, blower fan, rear window defroster) are off.




3. Drive the vehicle as shown in the graph. Driving condition before the constant speed driving is not specified.

4. Stop the vehicle and access ON BOARD SYSTEM READINESS menu of GENERIC OBD-II FUNCTION to inspect the completion status.
- If completed, RFC changes from NO to YES.
- If not completed, turn the ignition key off then repeat from Step 3.

5. Access DIAGNOSTIC MONITORING TEST RESULTS menu of GENERIC OBD-II FUNCTIONS to inspect the monitor results.
- If MEAS are not within the specification, repair has not been completed.

6. Verify no DTCs are available.
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