Sensor Stuck Test

The purpose of this monitor is to diagnose a stuck input signal from the intake air temperature sensor (TIA).

The signal from the intake air temperature sensor is compared to the starting intake air temperature sensor. The maximum absolute difference is recorded during the drive cycle.

After the vehicle has reached normal operating temperature following a soaked start, a minimum operating time has expired and the vehicle has been driven a minimum distance, the value of maximum intake temperature variation is compared to a threshold. If insufficient variation has occurred then a failure is declared.