Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information

Condition




Diagnostic trouble code (DTC) SUM-0203 is stored if the suspension module (SUM) registers that the difference in voltage between the central electronic module (CEM) and the suspension module (SUM) is greater than 2 V.

Note! The test is carried out every other operating cycle. The Suspension module (SUM) defines an operating cycle as ignition on and ignition off.

Substitute value
- Four-C control is switched off.

Possible source
- Contact resistance or oxidation in the connectors on the suspension module (SUM) or central electronic module (CEM)
- Internal fault in the control module.

Fault symptom[s]
- General warning lamp lit
- Message in the display
- Four-C does not work.