Diagnostic Trouble Code (DTC) Information CEM-8A29

Condition 

Fig 1: Identifying Right-Hand Gas Discharge Lamp Module

Courtesy of VOLVO CARS OF NORTH AMERICA.

The central electronic module (CEM) communicates with the right-hand gas discharge lamp module (GDL).

The diagnostic trouble code (DTC) is stored if the central electronic module (CEM) receives information from the right-hand gas discharge lamp module (GDL), which registers problems lighting the right-hand low beam.

The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on after 3 minutes.

Substitute Value 

• None.

Possible Source 

• Open-circuit in the signal cable to the right-hand low beam lamp
• The right-hand low beam lamp is faulty
• The right-hand low beam lamp is nearing the end of its service life.

Fault symptom[s] 

• Low beam does not work
• Low beam intermittent function.