Catalytic Converter Temperature Sensor

Disconnect wires from terminals No. 5 and 6 on electronic control box. Control box is located under left side of dash, near fuse block. Using an ohmmeter, check that circuit between sensor and control box is neither open or shorted. Reconnect wires and start engine. Ensure that air injection system is functioning, then disconnect either wire from terminal No. 5 or 6. Air injection should stop. If not, replace electronic control box.