S60 T5 L5-2.4L Turbo VIN 54 B5244T5 (2006)
The damper motor module (DMM) consists of a control unit and a stepper motor. The different versions of the climate control system have up to 5
damper motor modules (DMM). These are for the different functions such as defroster and recirculation. The climate control module (CCM)
communicates with the other damper motor modules (DMM) via two LIN buses, LIN bus 1 and LIN bus 2. The position of the damper motors on the
LIN buses depends on whether the vehicle is left or right-hand drive.
When regulating the different dampers, the climate control module (CCM) transmits a request for a new damper position to the each damper motor
module (DMM). The damper motor module (DMM) calculates and then regulates the required direction and number of steps required to obtain the
requested position. The damper motor module (DMM) then transmits information to the climate control module (CCM) indicating the actual damper
position and status.
When replacing the damper motor module (DMM), the new damper motor must be identified by the climate control module (CCM). This is carried out
via VIDA. When replacing the damper motors, ensure that identification is carried out.
Each damper motor module (DMM) is powered via a relay in the central electronic module (CEM).
There are diagnostics for the damper motor module (DMM).
Cooling system (not B8444S)
The engine control module (ECM) controls the A/C compressor. When the air conditioning (A/C) compressor on the dashboard environment panel is
activated, a request is transmitted via the control area network (CAN) to the engine control module (ECM) about the activation of the compressor. The
