Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CEM-DF15

Condition
Diagnostic trouble codes (DTCs) are stored if the central electronic module (CEM) registers that there is a short-circuit to ground in the CAN H in the high speed network.

Note! In the event of DFxx diagnostic trouble codes (DTCs), the central electronic module (CEM) must not be replace 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 ground in the high speed network.

Fault symptom[s]
- The starter motor turns but the engine does not start
- The engine cuts out
- Malfunction indicator lamp (MIL) lit
- Message in the display.