Diagnostic Trouble Code (DTC) Information CEM-8FF0

Condition 

Fig 1: Identifying Central Electronic Module (CEM)

Courtesy of VOLVO CARS OF NORTH AMERICA.

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

The diagnostic trouble code (DTC) is stored if the central electronic module (CEM) registers that the rain sensor 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 rain sensor button has jammed in the pressed in position
• Damaged rain sensor button.

Fault symptom[s] 

• No rain sensor function.