Circuit Description

The electronic brake control module (EBCM) sends antilock brake system (ABS) data to the engine control module (ECM). The data is sent to the ECM through a communication network called the GM local area network (LAN). Two circuits are used to communicate LAN data between the ECM and EBCM. A fault in the LAN will not cause DTC U0415 to set by itself. If a LAN fault occurs, other DTCs will set in addition to DTC U0415.

If the ECM receives invalid antilock brake system data from the EBCM, this DTC sets.