| Circuit Diagram |

Signal Waveform
Inspection 1. Turn the ignition switch OFF. 2. Disconnect the HO2S connector. 3. Measure resistance between the HO2S terminals 1 and 2. 4.
I
Inspection 1. Turn the ignition switch OFF. 2. Disconnect the temperature control actuator connector. 3. Verify that the temperature control actuator operates to the warm (Driver's side) or cool (Passenger's side) position when connecting 12V to terminal 3 and grounding terminal 4.