Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information

Condition
The Suspension module (SUM) monitors the internal functions in the control module. The control module checks that the installed software is compatible with the hardware.
The diagnostic trouble code (DTC) is stored if the control module detects that:
- Incorrect software has been installed.
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
- Incorrect software has been downloaded in the control module.

Fault symptom[s]
- Message in information display
- Four-C function not working