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Home >> Mazda >> 2009 >> 3 L4-2.3L >> Repair and Diagnosis >> Powertrain Management >> Emission Control Systems >> Catalytic Converter >> Testing and Inspection
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Catalytic Converter: Testing and Inspection




WARM-UP THREE-WAY CATALYTIC CONVERTER (WU-TWC) INSPECTION [LF, L3]

CAUTION:
- Perform the following procedures, DTC P0421 is indicated only.

1. Connect the M-MDS to the DLC-2.

2. Start the engine and warm it up to normal operating temperature.

3. Turn off the engine.

4. Verify that the engine compression is within the specification. Testing and Inspection

- If the compression pressure is not within the specification, repair or replace the malfunction part.

5. Drive the vehicle for 10 min at 65-96 km/h {40-60 mph} to allow the front catalytic converter to reach operating temperature.

6. Stop the vehicle and leave it in a safe space.

7. Access Test ID 10:21:80 on the "Diagnostic Monitoring Test Result" function.

8. Verify that the test result is within the specified indicated on the M-MDS.

- If it is not as specified, replace the front catalytic converter.

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