Pinpoint Test D: Lost Communication With Abs Module Concern
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
Normal Operation and Fault Conditions
With the ignition ON, the ABS module sends messages to the SECM over the HS-CAN2 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 .
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| SECM U0121:00 | Lost Communication With Anti-Lock Brake System (ABS) Control Module "A": No Sub Type Information | Sets when the SECM detects any of the ABS module messages are missing. This can be due to a ABS module failure, a circuit failure on the HS-CAN or an excessive load on the network. |
Possible Sources
- Network communication concern
- Charging system concern
- SASM
- ABS module
- SECM
Pinpoint Tests D: Lost Communication With ABS Module Concern