Diagnostic Trouble Code (DTC) Information
Condition
The Suspension module (SUM) internally stores, among other things, information about the selected drive mode and diagnostic trouble codes (DTCs) in a data memory.
The control module monitors reading and writing to the data memory.
The diagnostic trouble code (DTC) is stored if the control module detects that:
- No communication with the data memory (EEPROM).
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Ignition switch position II.
- The test is carried out every other operating cycle. The Suspension module (SUM) defines an operating cycle as ignition on and ignition off.
NOTE:
The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met.
Substitute Value
- Deactivated Four-C function.
Possible Source
- Internal memory fault in the Suspension module (SUM).
Fault symptom[s]
- Message in information display
- Four-C function not working