Malfunction Threshold

Short to ground detection
The SO2SGB1 terminal voltage is 0.210 V or less for at least 1 second after the vehicle is turned to the ON mode for 2.5 seconds.
Open circuit detection
The SO2B1 terminal voltage is 0.826 V or less and SO2SGB1 terminal voltage is between 1.704 V - 2.306 V for at least 1 second after 5 seconds from the engine run for 1 minute 40 seconds (duty integration value of 60,500 % (integrating per 50 milliseconds)).