Pinpoint Test CZ: SASM (Steering Angle Sensor Module) Communication Concern With The FCIM (Front Controls Interface Module): 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 FCIM sends messages to the GWM over the MS-CAN, the GWM relays the messages to the SASM over the HS-CAN2. If the SASM does not receive these messages within a certain time frame, the module sets Diagnostic Trouble Codes (DTCs). This can be due to a FCIM failure, a circuit failure on the CAN network or an excessive load on the network.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| SASM U0556:82 | Invalid Data Received From Front Display Interface Module: Alive/Sequence Counter Incorrect/Not Updated | Sets when the SASM does not receive fresh data from the FCIM within the allotted time. |
Possible Sources
- Wiring, terminals or connectors
- Network communication concern
- FCIM