Catalytic Converter: Testing and Inspection

Three Way Catalytic Converter, Checking

Test requirements

• Battery voltage at least 12.5 volts.

• Oxygen Sensors OK.

• No leaks or damage to exhaust system.

Test procedure

- Perform a preliminary check to verify the customers complaint. Refer to --> [ Preliminary Check ] Preliminary Check

Function test

- Perform the function test in Diagnostic Mode 06. Refer to --> [ Diagnostic Mode 06 - Read Test Results for Specific Diagnostic Functions ] Mode 6 Data.

- End diagnosis and switch the ignition off.

If the specified values are exceeded:

- Check the exhaust system for leaks.

- If necessary, repair the leak in the exhaust system.

- Erase the DTC memory. Refer to --> [ Diagnostic Mode 04 - Erase DTC Memory ] Clearing Diagnostic Trouble Codes.

- Perform a road test to verify Repair.

If the DTC does not return:

Repair complete, Generate readiness code. Refer to --> [ Readiness Code ] Monitors, Trips, Drive Cycles and Readiness Codes.

- End diagnosis.

If no leaks are found in the exhaust system:

- Replace the catalytic converter including front exhaust pipe. --> Engine, Mechanical 26 Catalytic Convertors, Removing and Replacing.

Final procedures

After the Repair work, the following work steps must be performed in the following sequence:

1. Check the DTC memory. Refer to --> [ Diagnostic Mode 04 - Erase DTC Memory ] Clearing Diagnostic Trouble Codes.

2. If necessary, erase the DTC memory. Refer to --> [ Diagnostic Mode 04 - Erase DTC Memory ] Clearing Diagnostic Trouble Codes.

3. If the DTC memory was erased, generate readiness code. Refer to --> [ Readiness Code ] Monitors, Trips, Drive Cycles and Readiness Codes.

End of diagnosis.