Pinpoint Test T: SASM Communication Concern With BCM: Notes
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.
Refer to MODULE COMMUNICATIONS NETWORK for schematic and connector information.
Normal Operation and Fault Conditions
With the ignition ON, the BCM sends messages to the SASM over the HS-CAN. If the SASM does not receive these messages within the specified time frame, the module sets a DTC. This can be due to a BCM failure, a circuit failure on the HS-CAN or an excessive load on the network. For information on the cruise control messages sent to the SASM by the BCM, REFER to: Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description .
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| SASM U0140:00 | Lost Communication With Body Control Module: No Sub Type Information | Sets when the SASM does not receive any messages from the BCM. |
| SASM U0422:00 | Invalid Data Received From Body Control Module: No Sub Type Information | Sets if the SASM receives invalid data in the BCM personality message. |
Possible Sources
- Wiring, terminals or connectors
- Network communication concern
- BCM
- SASM