Pinpoint Test AE: Abs (Anti-Lock Brake System) Module Communication Concern With PSCM (Power Steering Control Module)
Refer to Module Communications Network for schematic and connector information.
Normal Operation and Fault Conditions
With the ignition ON, the PSCM sends messages to the ABS module over the FD-CAN. 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 PSCM 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 PSCM, 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 C0051:64 | Steering Wheel Position Sensor: Signal Plausibility Failure | This DTC sets when the ABS module determines the steering angle message is implausible when compared to the steering angle module value (based on the yaw rate sensor information). This DTC also sets if the long term offset compensation monitoring is completed after more than 30 km (18 miles) of straight driving resulting in a long term filtered steering angle offset greater than 15 degrees. |
| ABS C0051:67 | Steering Wheel Position Sensor: Signal Incorrect After Event | Sets when the PSCM indicates the steering center position cannot be found or has been lost. |
| ABS C0051:85 | Steering Wheel Position Sensor: Signal Above Allowable Range | Sets when the total steering wheel angle is above 1, 440 degrees. |
| ABS C0051:96 | Steering Wheel Position Sensor: Component Internal Failure | Sets when the steering angle sensor information from the PSCM is "invalid", "unknown" or "faulty" instead of the actual sensor information. |
| ABS U0131:00 | Lost Communication With Power Steering Control Module 'A': No Sub Type Information | Sets if the PSCM messages are missing. |
| ABS U0420:00 | Invalid Data Received from Power Steering Control Module 'A': No Sub Type Information | Sets when the ABS module receives invalid steering information from the PSCM. |
Possible Sources
- Wiring, terminals or connectors
- Network communication concern
- PSCM
Pinpoint Tests AE: ABS Module Communication Concern With PSCM