Component Inspection

■ Rear HO2S (S2) check 

1. S2 visual check
   • Check assembling state of S2. (Check the interference between sensor wiring and exhaust pipe.)
   • Check corrosion, contamination, or damage on sensor terminal and connector.
2. Is there something wrong?

   YES 

   • Repair as necessary and then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.

   NO 

   • Go to "Catalyst converter check" procedure below.

■ Catalyst converter check 

1. Catalyst converter visual check
   • Check discoloration by over-heating.
   • Check deflection or crack (hole).
   • Check noise.
2. Check whether the catalyst converter is genuine.
3. After erase the DTC, drive the vehicle more than 60 sec according to "Enable Conditions"(Refer to "DTC DETECTING CONDITION "). And then, confirm DTC.
4. Is there something wrong?

   YES 

   • Substitute with a known-good Catalyst Converter and check for proper operation. If the problem is corrected, replace Catalyst Converter and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

   NO 

   • Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage. So, check poor connections and the related circuit between ECM and component thoroughly. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.