Pinpoint Test BA: SASM (Steering Angle Sensor Module) Communication Concern With The GWM (Gateway Module A): 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 VEHICLE DYNAMIC SYSTEMS for schematic and connector information.
Normal Operation and Fault Conditions
REFER to: Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description .
With the ignition ON, the GWM sends messages to the SASM over the HS-CAN2. If the SASM does not receive these messages within a certain time frame, the SASM sets Diagnostic Trouble Codes (DTCs). This can be due to a GWM failure, a circuit failure on the HS-CAN or an excessive load on the network.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| SASM U0146:00 | Lost Communication With Serial Data Gateway "A": No Sub Type Information | Sets when the SASM detects any of the GWM messages are missing. |
Possible Sources
- Network communication concern
- GWM