Damper Motor Module (DMM)
The Damper motor module (DMM) consists of a control unit and a stepper motor.
The climate control system for ECC has 5 Damper motor modules (DMM), whilst ETC has 3.
The various Damper motor modules (DMM) are for the following functions:
- defroster (only ECC)
- recirculation
- air distribution
- temperature left (only ECC)
- temperature right (only ECC)
- temperature (only ETC)
The Climate control module (CCM) communicates with the different Damper motor modules (DMM) via two LIN busses, LIN bus 1 (ECC and ETC) and LIN bus 2 (only ECC).
The positions of the damper motors on the LIN buses are determined by the system overview section, control module in this document.
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 the diagnostic tool. 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).