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Intake Air Plausibility Check: General Description

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This diagnosis checks IAT integrity for a plausible range and signal stuck.

For the range detection, IAT has to be within coolant temperature and ambient temperature window. If IAT is outside of the range plus an offset, the error symptom is set and the error counter is de-bounced.

If the vehicle was driven with a certain vehicle speed for a calibratable time (IAT sensor cool down) and afterwards the vehicle was in idle for a calibratable time (IAT sensor hot up), the IAT signal must have moved. If the signal has not moved after a calibratable number of cool down/hot up phases, a stuck IAT signal is detected and the error is de-bounced.

For RBM handling the Cold Start Denominator will be considered.

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