Diagnostic Trouble Code (DTC) Information CEM-8F51

Condition 

Fig 1: Identifying Central Electronic Module (CEM)

Courtesy of VOLVO CARS OF NORTH AMERICA.

The central electronic module (CEM) checks the output signal to the relay coil for the headlamp wash/wipe.

The diagnostic trouble code (DTC) is stored if the central electronic module (CEM) registers that the output signal to the relay coil is too high.

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
• Damaged relay.

Fault symptom[s] 

• The headlamp washer motor does not operate.