Pinpoint Test J: Abs (Anti-Lock Brake System) Module Communication Concern With SASM (Steering Angle Sensor Module)
Refer to MODULE COMMUNICATIONS NETWORK for schematic and connector information.
Normal Operation and Fault Conditions
With the ignition ON, the SASM sends messages to the ABS module over the HS-CAN2. If the ABS module does not receive these messages within the specified time frame, the ABS module sets Diagnostic Trouble Codes (DTCs). This can be due to a SASM failure, a circuit failure on the CAN or an excessive load on the network. For information on the messages sent to the ABS module by the SASM, REFER to: Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description .
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| ABS U0126:87 | Lost Communication With Steering Angle Sensor Module: Missing Message | This DTC sets if the steering wheel angle information or steering wheel calibration message from the SASM contains invalid or faulty information. |
| ABS U0428:82 | Invalid Data Received From Steering Angle Sensor Module: Alive / Sequence Counter Incorrect / Not Updated | The SASM sends a rolling counter in the adaptive steering messages sent to the ABS module. This DTC sets if the rolling counter value is incorrect. |
| ABS U0428:83 | Invalid Data Received From Steering Angle Sensor Module: Value Of Signal Protection Calculation Incorrect | This DTC sets if the calculated and received adaptive steering checksum is incorrect. |
Possible Sources
- Network communication concern
- SASM -clockspring assembly