Diagnostic Trouble Code (DTC) Information CEM-6F83

Condition 

Fig 1: Identifying Dimmer/Rheostat

Courtesy of VOLVO CARS OF NORTH AMERICA.

The diagnostic trouble code is stored if the central electronic module (CEM) registers that the signal is too low or that there is no input signal from the rheostat.

The diagnostic trouble code can be diagnosed when the ignition is on and the rheostat is not active.

Substitute Value 

• None.

Possible Source 

• The rheostat is short-circuited to ground.
• Open-circuit in the signal cable
• Damaged light switch.

Fault symptom[s] 

• Instrument lighting/Dimmer does not work
• Instrument- /button lighting/Does not work