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Home >> Volvo >> 2009 >> XC90 R-Design, AWD >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Climate Units - Symptom Related Diagnostic Procedures >> Checking The Damper Motor Module (DMM) (L. H. D; 2005-2014) >> Checking The Damper Motor Module (DMM) >> Checking The Damper Motor Module (DMM) >> Checking Control Modules
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Checking Control Modules

Fig 1: Checking Traffic Load On CAN Cables
GLL101053Courtesy of VOLVO CARS CORPORATION

The Damper motor module (DMM) consists of a control unit and a stepper motor. The climate control system can have up to 5 Damper motor modules (DMM), the amount depends on the version of climate control system. These Damper motor module (DMM) control recirculation, defroster, temperature left/right and air distribution.

To check which control module/sensors are part of vehicle configuration and of Climate control module (CCM) expected/detected control modules/sensors, click on the symbol for VCT2000.

If a control module is missing according to the car configuration, check that the control module is installed and correctly connected.

Read off which control module/sensors are on LIN bus 1 and 2 and compare them with the vehicle configuration.

The control modules and sensors that are to be included and which can be presented in the vehicle configuration can be read out from the tables below.

LIN BUS 1.

Control module/sensor. On LIN bus 1.
Damper motor module (DMM) air distribution. Always.
Damper motor module (DMM) temperature left. Always.
Left seat heating. If the vehicle is equipped with seat heating.
LIN BUS 2

Control module/sensor. On LIN bus 2.
Damper motor module (DMM) temperature right. Always.
Damper motor module (DMM) defroster. If the vehicle is equipped with ECC.
Damper motor module (DMM) recirculation. If the vehicle is left-hand drive.
Seat heater, right. If the vehicle is equipped with seat heating.
Air quality sensor (AQS). If the vehicle is left-hand drive and equipped with an air quality sensor (AQS).
CAR CONFIGURATION

Parameter. Options
Guide. Left-hand drive.
Climate control. Electronic climate control.
ECC/AQS.
ECC, rear AC.
MCC.
Seat heating calibration. No
Low 28°C - High 35°C.
Low 30°C - High 36°C.
Low 31°C - High 37°C.
Low 32°C - High 38°C.
Low 33°C - High 39°C.
Low 34°C - High 40°C.
Low 35°C - High 41°C.
Low 36°C - High 43°C.
Passenger compartment filter. Pollen filter.
Air quality sensor (AQS).
Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA
GLL100564Courtesy of VOLVO CARS CORPORATION
Fig 3: Identifying Damper Motor Module (DMM)
GLL140232Courtesy of VOLVO CARS CORPORATION

Was a damaged Damper motor module (DMM) found? 

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