Circuit Operation
- A voltage corresponding to the oxygen concentration in the exhaust gas is sent to the ECM (terminal 76 - M/T) or PCM (terminal 71 - A/T) from the output terminal (terminal 4) of the heated oxygen sensor (front).
- Terminal 2 of the heated oxygen sensor (front) is grounded with ECM (terminal 92 - M/T) or PCM (terminal 57 - A/T).