A/C - Damper Motor Module (DMM) ID And Calibration
NO: 87-48DATE: 03-08-2005
MODEL:
All new S40 and V50, S60, V70, XC70, S80, XC90.
M. YEAR:
MY04 (All new S40) and MY05 (all models).
SUBJECT:
Damper Motor Module, Identification and Calibration.
REFERENCE:
VADIS 2004F+
DESCRIPTION:
When replacing a Damper Motor Module (DMM), it is necessary to identify the DMM before performing the calibration. It may be difficult to find the identification process in VADIS version 2004F+.
SERVICE:
When a DMM is replaced, perform following steps:
Important Note:
Before performing identification or calibration, make sure that the climate unit has normal room temperature. It is possible that heater flaps may not go all the way to the end positions if the unit is too cold. This may result in temperature difference between left and right side.
1) Performing identification after replacing a DMM:
In VADIS version F+: Go to "Information Manager/Group 8/Diagnostic information/ Diagnostic trouble codes and associated procedures.
Select group 87, climate units, and open the DTC CCM-0071 - Damper motor, faulty position. In this page, click "continue" to proceed to the "Identification of damper motors" page. For certain variants, a selection for the structure week must be made. The structure week of a car can be found in VADIS under "Vehicle Communication/Group 0/General service/Reading off structure week".
2) After Identification, proceed with the calibration:
In VADIS version F+: Go to "Vehicle communication/group 8/ Climate Control Module/Checking LIN bus. Click on the VCT symbol to start calibrating the CCM.
For future VADIS/VIDA versions, the identification process will be moved to "Vehicle Communication".
USEFUL INFORMATION:
What is done during the identification?
The Climate Control Module (CCM) commands each DMM to move to its lower and upper end stop. The CCM counts the amount of steps the DMM moved.
The amount of steps is then used to determine which function the DMM has in the system (see reference table shown). The CCM will then reprogram the DMM with the ID corresponding to that function.
What is done during the calibration?
The Calibration checks the configuration of the LIN bus 1 and LIN bus 2. The CCM checks the presence of the Damper Motor Modules, Seat heat modules (option) and Air Quality Sensor (option). The range for each DMM is also checked to ensure that they are within specification.
Hint for fault tracing:
Reading out the actual ranges between upper and lower end positions measured by the DMM's (see reference table) can be helpful during fault tracing.
In VADIS, go to "Information Manager/Group 8/Diagnostic Information/Diagnostic trouble codes and associated procedures. Select group 87, climate units, and open the DTC CCM-0071 - Damper motor, faulty position. Click on the VCT symbol to proceed to reading out the actual range per DMM.
If you would run into a range of 0 or 4095, there may be an identification problem. Try to re-identify before continuing with fault tracing.
Warranty Information