Diagnostic trouble code (DTC) information CCM-0091

Condition 

Fig 1: Identifying Climate Control Module (CCM)

Courtesy of VOLVO CARS OF NORTH AMERICA.

The diagnostic trouble code (DTC) is stored if the climate control module (CCM) registers that the identity of a lower switch is missing compared to the switch identities included in the Car Config File.

The diagnostic trouble code (DTC) can be diagnosed in ignition positions I and II.

Substitute Value 

• The climate control module (CCM) assumes different values depending on which switch identity is missing.

Possible Source 

• Defective switch
• Switch missing
• Fault in the Car Configuration File.

Fault symptom[s] 

• The function button is not working.