Diagnostic Trouble Code (DTC) Information CEM-8F21

Condition 

Fig 1: Identifying Windshield Wiper Lever

Courtesy of VOLVO CARS OF NORTH AMERICA.

The central electronic module (CEM) checks the windshield wipers.

The diagnostic trouble code (DTC) is stored if the central electronic module registers that the signal on the signal cable for the windshield wiper lever is too high or missing.

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

Substitute Value 

• None.

Possible Source 

• Short-circuit to supply voltage in the signal cable
• Open-circuit in the signal cable.

Fault symptom[s] 

• The windshield wipers are not working.