Normal Operation And Fault Conditions
WARNING: This page is about a different car, the 2021 Ford Transit Connect. However, it is still accessible from the selected car via links, so may be relevant.
With the ignition ON, the ABS module sends messages to the SECM over the HS-CAN 2 and through the SASM. If the SECM does not receive these messages within a certain time frame, the SECM sets a DTC. For information on the messages sent to the SECM by the ABS module, refer to the Network Message Chart in the Description and Operation in the Power Steering article.
SECM DTC FAULT TRIGGER CONDITIONS
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| U0121:00 | Lost Communication With Anti-Lock Brake System (ABS) Control Module: No Sub Type Information | Sets when the SECM detects any of the ABS module messages is missing. This can be due to a ABS module failure, a circuit failure on the HS-CAN or an excessive load on the network. |