4.15.1 High or low input failure

These monitors run continuously. The voltage from the sensor is compared with failure thresholds that are pre-defined.

If the voltage is below the low threshold, then a timer will be incremented. If this timer exceeds a threshold, then a failure flag is set and a DTC is stored.

If the voltage is over the high threshold, then a timer will be incremented. If this timer exceeds a threshold, then a failure flag is set and a DTC is stored.