Catalytic Converter: Testing and Inspection

THREE WAY CATALYTIC CONVERTER (TWC) SYSTEM

ON-VEHICLE INSPECTION

1. INSPECT EXHAUST PIPE ASSEMBLY
a. Check the connections for looseness or damage.
b. Check the clamps for wear, cracks or damage.

2. INSPECT TWC
Check for dents or damage.
If any part of the protector is damaged or dented to the extent that it contacts the TWC, repair or replace it.

3. INSPECT HEAT INSULATOR
a. Check the heat insulator for damage.
b. Check for adequate clearance between the catalytic converter and heat insulator.