Diagnostic Trouble Code (DTC) Information

Condition 

Diagnostic trouble code (DTC) CEM-1E04 is stored if the central electronic module (CEM) registers that communication with the light switch module is not operating within 5 seconds of the ignition being switched on.

Substitute Value 

None

Possible Source 

• Fault in the cable between the light switch module and the central electrical module (CEM)
• Defective communication device, lamp switch module
• Defective communication device, central electronic module (CEM)

Fault symptom[s] 

• Beam height control does not function
• The light switch does not operate