Diagnostics Interface

The SCCM control unit has a CAN diagnostics interface to the HS CAN and the LS CAN. The HS and LS bus lines are looped through the SCCM to the diagnostics plug. Warning: If the SCCM plug is disconnected, the connection between the diagnostics plug and the HS and LS bus is interrupted.
To avoid damage to control units in the CAN network by external voltage shorts or ground shorts, the SCCM control unit has an internal protective circuit both for the HS CAN and the LS CAN. Diagnosis is also carried out by means of the CAN bus.