Diagnostic Trouble Code (DTC) Information CEM-9F24

Condition 

Fig 1: Identifying Light Switch Module (LSM)

Courtesy of VOLVO CARS OF NORTH AMERICA.

The central electronic module (CEM) communicates with the light switch module (LSM).

The diagnostic trouble code (DTC) is stored if the central electronic module (CEM) receives information from the light switch module (LSM) indicating that the signal from the rheostat is too high.

The diagnostic trouble code (DTC) can be diagnosed at ignition switch position II.

Substitute Value 

• None.

Possible Source 

• Short-circuit to supply voltage in the rheostat
• Damaged light switch.

Fault symptom[s] 

• The instrument lighting does not operate.