Diagnostic Trouble Code (DTC) Information CCM-B108754

Condition

Climate control module (CCM) both sends and receives information via standardized serial communication - LIN (Local Interconnect Network). Climate control module (CCM) checks status of LIN-bus 1 and 2. After repair, software downloading or replacement of components, the system must be calibrated.

The diagnostic trouble code (DTC) is stored if the control module detects that:

New software is downloaded to the control module. Calibration not completed.

NOTE:

For frozen values, from original read-out, to show correct values after a software download the control module has to be calibrated.

The control module's test for the diagnostic trouble code (DTC) starts in the event of:

Ignition switch position II.

Fig 1: Identifying Climate Control Unit

Courtesy of VOLVO CARS CORPORATION

Substitute Value

None.

Possible Source

Calibration not performed.

Fault symptom[s]

Air flow problem
No recirculation
Temperature control/Uneven temperature
Poor heating in compartment
Front seat heating does not operate
Rear seat heating does not operate