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
  - Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  NO
  - 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 PCM/ECM)
  - Any road damage
2. Was a problem found in any of the above areas?
  YES
  - Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  NO
  - 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
  - Replace TWC and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  NO
  - Check for poor connection between PCM/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.