Methods and systems are provided for diagnosing sensors in an engine intake by utilizing in
an evaporative leak check module pump (ELCM pump). In one example, during engine off …

Embodiments for testing a humidity sensor are provided. One example method comprises
indicating degradation of a humidity sensor based on a humidity sensor output and output …

Methods and systems are provided for detecting degradation of a crankcase ventilation tube.
Humidity sensed from a humidity sensor in the crankcase ventilation tube may provide an …

A diagnostic method for a capacitive humidity sensor comprising a heater, and a
capacitance-sensing element that individually identifies heater, temperature-sensing …

Methods and systems are provided for diagnosing a humid ity sensor positioned in an intake
system of a vehicle engine system. In one example, a method comprises rotating an engine …

Methods and systems are provided for pinpointing a source of degradation in a vehicle
engine system. In one example, a method includes spinning an engine of a vehicle unfueled …

Methods and systems are provided for estimating ambient humidity based on a wet bulb
temperature and a dry bulb temperature during precipitation, and estimating ambient …

The present disclosure provides an air flow rate measuring device disposed in an intake air
passage. The air flow rate measuring device measures a flow rate of the intake air flowing …

Embodiments for testing a humidity sensor are provided. One example method comprises
indicating degradation of a humidity sensor based on a humidity sensor output and output …

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6/2009 Holm et al. 8, 315, 759 B2 11/2012 Bauerle 9, 163, 588 B2 10/2015 Sumilla et al. 9 …