Diagnostic trouble code (DTC) information CEM-7A09

Condition 

Fig 1: Identifying Down Button

Courtesy of VOLVO CARS OF NORTH AMERICA.

The central electronic module (CEM) checks the signal from the down button.

The diagnostic trouble code (DTC) is stored if the central electronic module (CEM) registers that the down button has been active for more than 1 minute.

The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.

Substitute Value 

• None.

Possible Source 

• The down button has jammed in the pressed in position
• Damaged down button.

Fault symptom[s] 

• The RTI buttons on the steering wheel do not function
• The navigation buttons on the steering wheel do not function.