Normal Operation and Fault Conditions
WARNING: This page is about a different car, the 2020 Ford Transit Connect. However, it is still accessible from the selected car via links, so may be relevant.
With the ignition ON, the GSM sends messages to the ABS module over the HS-CAN 2. If the ABS module does not receive these messages within a certain time frame (usually less than 1 second), the ABS module sets a DTCs. For information on the messages sent to the ABS module by the GSM, refer to the Description and Operation in the Anti-Lock Brake System (ABS) and Stability Control article.