Electrical Faults

In the event of errors in the signal levels on the communication cables for the central electronic module (CEM) a diagnostic trouble code (DTC) is stored in the central electronic module (CEM). A check is carried out on each communication cable to the central electronic module (CEM), CAN L, CAN H on the low speed side and CAN L and CAN H on the high speed side. The faults that can be detected by the central electronic module (CEM) are:

• Short-circuit of controller area network (CAN) wiring to supply voltage
• Short-circuit of controller area network (CAN) wiring to ground
• Short-circuit between the control area network (CAN) cables
• Open-circuit in the CAN H.

This allows a total of 12 electrical diagnostic trouble codes (DTCs) in the controller area network (CAN).

The diagnostic trouble codes for electrical faults are CEM-DF0X for the low speed network and CEM-DF1X for high speed network.