Humidity Sensor in Fresh Air intake Duct -G657-, CHECKING

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NOTE:

Different versions depending on the vehicle date of manufacture and A/C system version ("Basis" or "Convenience"). Refer to Air Quality Sensor -G238-, FUNCTION .

The Humidity Sensor in Fresh Air intake Duct -G657- is only installed on vehicles from MY 2012 as a running change. Refer to Air Quality Sensor -G238-, FUNCTION .

The Air Quality Sensor -G238- and the Humidity Sensor in Fresh Air intake Duct -G657- need approximately two minutes until they reach their operating temperature after turning on the ignition. The function of the Air Quality Sensor -G238- and the Humidity Sensor in Fresh Air intake Duct -G657- is limited during the warm-up phase.

The function of the Humidity Sensor in Fresh Air intake Duct -G657- can only be checked via the "Guided Fault Finding ". The measured values of the Humidity Sensor in Fresh Air intake Duct -G657- are evaluated there via the "read measured values" function and are compared to the temperature and humidity measured at the component location of the Humidity Sensor in Fresh Air intake Duct -G657- using the Vehicle Diagnostic Tester in the "Guided Fault Finding " function

Check the function of the Humidity Sensor in Fresh Air intake Duct -G657- using the Vehicle Diagnostic Tester in the "Guided Fault Finding " function.