Air quality sensor (AQS) (ECC only, option)
The air quality sensor (AQS) is available as an option for ECC. The air quality sensor (AQS) is, together with a particle filter, part of a system which has the role of ensuring that the air in the passenger compartment is free of pollutants. The role of the air quality sensor (AQS) is to transmit a signal to the climate control module (CCM) if it detects increased concentrations of pollutants in the outside air.
The air quality sensor (AQS) measures concentrations of COx and NOx.
The air quality sensor (AQS) compares the present values with previous ones and can calculate changes in pollutant concentrations.
The air quality sensor (AQS) communicates with the climate control module (CCM) via a LIN bus.
The signal from the air quality sensor (AQS) to the climate control module (CCM) has four steps, 0-3:
- off = no increase or reduction in pollutant level
- signal 1 = gradual increase in pollutant level
- signal 2 = medium increase in pollutant level
- signal 3 = rapid increase in pollutant level.
The climate control module (CCM) uses the signal to control the recirculation damper motor.
There are diagnostics for the air quality sensor (AQS).