Diagnostic trouble code (DTC) information CEM-1A65

Condition 

The central electronic module (CEM) checks the communication with the suspension module (SUM).

Diagnostic trouble code (DTC) CEM-1A65 is stored in the central electronic module (CEM) if it registers a fault in the communication with the suspension module (SUM).

Diagnostic trouble code (DTC) CEM-1A65 can be detected when the ignition is on for at least 10 seconds and the battery voltage is > 10.5 volts.

Substitute Value 

• None.

Possible Source 

• No power supply to the suspension module (SUM)
• Contact resistance in the terminals
• Open-circuit in the control area network (CAN) bus
• Defective Suspension Module (SUM).

Fault symptom[s] 

• General warning lamp lit
• Four-C does not work.