Terminal and Connector Inspection

Many malfunctions in the electrical system are caused by poor harness and terminals.
Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
Thoroughly check connectors between PCM and components including: backed out terminal, improper mating, broken locks, looseness, poor connection, bending, corrosion, contamination, deterioration, damage or poor terminal to wire connection.
Has a problem been found?

Fig 1: Heater Oxygen Sensor Circuit Diagram (A/T) And Connector End View
Courtesy of KIA MOTORS AMERICA, INC.

Fig 2: Heater Oxygen Sensor Circuit Diagram (M/T) And Connector End View
Courtesy of KIA MOTORS AMERICA, INC.

YES
- Repair as necessary and go to "Verification of Vehicle Repair " procedure.
NO
- Go to "Signal Circuit Inspection " procedure.