Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CEM-DF16

Condition




The central electronic module (CEM) checks CAN L in the high speed network.
The diagnostic trouble code (DTC) is stored if the central electronic module (CEM) registers a short-circuit to supply voltage in the CAN L in the high speed network.
The diagnostic trouble code (DTC) can be diagnosed with the ignition in positions I or II.

Note! In the event of DFxx diagnostic trouble codes (DTCs), the central electronic module (CEM) must not be replaced as the diagnostic trouble code (DTC) indicates a short-circuit in one or more conductors in the Control area network! The central electronic module (CEM) is the only control module that monitors the voltage level in the Control area network wiring. The central electronic module (CEM) is therefore the only control module that can store a diagnostic trouble code (DTC) for a short-circuit in one of the cables to ground or supply voltage. Do not replace the central electronic module (CEM) in the event of a CAN fault unless VIDA fault-tracing has indicated that the central electronic module (CEM) has an internal fault.

Substitute value
- None.

Possible source
- Short-circuit to supply voltage in the high speed network.

Fault symptom[s]
- The engine fails to start
- The engine cuts out
- Malfunction indicator lamp (MIL) lit
- Message in the display.