Pinpoint Test CZ: SASM (Steering Angle Sensor Module) Communication Concern With The FCIM (Front Controls Interface Module)
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