1.14.3.3.1 General description

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2010 BMW X6, 2010 BMW 535xi, 2010 BMW 535i, 2010 BMW 135i, and 2009 BMW X6. However, it is still accessible from the selected car via links, so may be relevant.

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 calibratible time (IAT sensor cool down) and afterwards the vehicle was in idle for a calibratible time (IAT sensor hot up), the IAT signal must have moved. If the signal has not moved after a calibratible number of cool down/hot up phases, a stuck IAT signal is detected and the error is debounced.

For RBM handling the Cold Start Denominator will be considered.

Error Symptoms:

Signal too high
Signal too low
Signal not plausible