Diagnostic trouble code information

Condition 

If the control unit does not get a response from the sunroof after a repeated request, the control unit interprets this as a communication fault and a diagnostic trouble code is set.

Substitute Value 

• Nothing.

Possible Source 

• Open circuit on UEM_K3 (serial wire between UEM, siren and sunroof).
• UEM_K3 short circuited to ground.
• UEM_K3 short circuited to voltage supply.
• Defective sunroof.

Fault symptom[s] 

• Electric sunroof does not work.