Malfunction Threshold

Short to ground detection
The SO2SGB2 terminal voltage is 0.210 V or less for at least 1.0 second after the vehicle is turned to the ON mode for 2.5 seconds.
Open circuit detection
The SO2B2 terminal voltage is 0.826 V or less and SO2SGB2 terminal voltage is between 1.704 V - 2.306 V for at least 1.0 second after 5.0 seconds from the engine run for 1 minute 40 seconds (duty integration value of 60,500 % (integrating per 50 milliseconds)).