Diagnostic Trouble Code (DTC) Information CEM-8F04

Condition 

Fig 1: Identifying Steering Wheel Control Module

Courtesy of VOLVO CARS OF NORTH AMERICA.

The central electronic module (CEM) checks the turn signal lamps.

The diagnostic trouble code (DTC) is stored if the central electronic module (CEM) registers that the signal from the switch for the turn signal lamps is faulty.

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

Substitute Value 

• None.

Possible Source 

• Damaged switch for the turn signal lamps
• Internal fault in the steering wheel module (SWM).

Fault symptom[s] 

• The turn signal lamps do not work.