System Inspection

Exhaust System Inspection

1. Visually/physically inspect the following conditions:
- Exhaust system between HO2S and Three way catalyst for air leakage, restriction and damage.
- Damage, and for loose or missing hardware:
2. Was a problem found in any of the above areas ?
YES
1) Repair as necessary and go to "Verification of Vehicle Repair" procedure
NO
1) Go to "Rear HO2S Inspection" procedure
Rear HO2S Inspection
1. Visually/physically inspect the rear HO2S for the following conditions:
- Ensure that the HO2S is securely installed. (Pigtail and wiring harness not making contact with the exhaust pipe)
- Check for corrosion on terminals
- Check for terminal tension (at the HO2S and at the ECM)
- Any road damage
2. Was a problem found in any of the above areas ?
YES
1) Repair as necessary and go to "Verification of Vehicle Repair" procedure
NO
1) Go to "TWC Inspection" procedure

TWC Inspection

1. Visually/physically inspect the three-way catalyst (TWC) converter for the following damage:
- Severe discoloration caused by excessive temperature
- Dents and holes
- Internal rattle caused by a damaged catalyst
2. Also, ensure that the TWC is a proper original equipment manufacturer part.
3. Was a problem found ?
YES
1) Replace TWC and go to "Verification of Vehicle Repair" procedure
NO
1) Check for poor connection between ECM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair" procedure