Air Quality Sensor (AQS) (ECC Only, Option)
An Air quality sensor (AQS) is available as an option for ECC. The Air quality sensor (AQS) is included with a particle filter and a humidity sensor (2008-) in a system whose main task is to ensure that the air in the passenger compartment is free of contaminants.
The task of the Air quality sensor (AQS) is to transmit signals to the Climate control module (CCM) if it registers increased amounts of contaminated outdoor 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:
- signal 0= no increase in or reduced 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.
The air quality sensor (AQS) is under the cowl on the right-hand side of the fresh air intake.
There are diagnostics for the air quality sensor (AQS).