S60 AWD L5-2.5L Turbo VIN 59 B5254T2 (2005)
See Design and Function, central electronic module (CEM).
Evaporator temperature sensor
The evaporator temperature sensor is installed on the heater. Its role is to inform the climate control module (CCM) of the temperature of the refrigerant.
The climate control module (CCM) controls the request from the evaporator temperature sensor to activate the air conditioning compressor. The
evaporator temperature sensor is directly connected to the climate control module (CCM).
There are diagnostics for the evaporator temperature sensor.
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:
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off = no increase or reduction in pollutant level