Interface fault in control unit

For the control unit function, information on partner control units is essential. The fault is entered if the relevant partner control unit (= interface to control unit) sends a substitute value or an invalid ID instead of the required information, thus impairing the control unit function. In this case, a fault entry should also be made in the corresponding partner control unit. For this fault, the cause does NOT  lie in the control unit which stores the interface fault, or in its software!

Possible fault causes:

• The relevant partner control unit is not yet operational.
• The sensor system of the relevant partner control unit is defective.
• General fault of the partner control unit