Operation CHARM: Car repair manuals for everyone.

Air Quality Sensor







Air Quality Sensor

Sensor for air quality detects pollutants in the ambient air (mostly gasoline and/or diesel fumes).

Climatronic Control Module (J255) evaluates signal from Air Quality Sensor (G238). The A/C system is activated depending on the strength and type of heavily polluted air.

At an outside temperature greater than approximately + 2° C (36° F), recirculation mode is switched on when there is only a slight increase in pollutants in the ambient air.

At an outside temperature between approximately + 2° C (36° F) and approximately -5° C (23° F), the switch to recirculation mode only occurs at a sharp increase in the pollutant level. The A/C compressor is switched on at the same time.