Catalytic Converter: Testing and Inspection

THREE-WAY CATALYTIC CONVERTER (TWC) INSPECTION [13B-MSP]

CAUTION:
- Perform the following procedures if only DTC P0420 is detected.

NOTE:
- Make sure that no HO2S DTCs have been detected. If detected, this inspection is not applicable for TWC inspection.






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

2. Verify that the HO2S DTCs are not detected using the M-MDS.

- If an HO2S DTC is detected, perform the appropriate DTC inspection procedure. Engine - DTC Table

3. Clear the DTC form the PCM memory using the M-MDS.

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

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

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

6. Drive the vehicle at Drive Mode 3. OBD-II Drive Mode

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

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

- If not as specified, replace the TWC. Service and Repair