Pinpoint Test Ag: Abs (Anti-Lock Brake System) Module DTC C0051 Steering Angle Concerns With The PSCM (Power Steering Control Module) - Mechanical
Normal Operation and Fault Conditions
The PSCM calculates steering wheel rotation speed, angle and direction of rotation and sends the information to the ABS module over the FD-CAN. If the information is incorrect, invalid or corrupted, the ABS module sets one or more Diagnostic Trouble Codes (DTCs).
Pinpoint Test Applicability
- Pinpoint Test Applicability
- This test applies to mechanical concerns with the PSCM resulting in ABS module DTC C006B:xx, ABS module DTC C0051:xx or false activation only.
DTC Diagnostic Strategy
- DTC Diagnostic Strategy
- If the module DTC list results in a large number of Diagnostic Trouble Codes (DTCs), diagnose all module hard faults first (C102D, C1B00, C200B, C200C, C200D, U2011 and U3000) before diagnosing any network faults (lost communication or invalid data). If voltage concern Diagnostic Trouble Codes (DTCs) are present, diagnose those after any module hard faults and before any network faults. Diagnose all current and active Diagnostic Trouble Codes (DTCs) before diagnosing any historic Diagnostic Trouble Codes (DTCs).
Pinpoint Test Purpose
- Pinpoint Test Purpose
- This pinpoint test checks both the driving events and mechanical component conditions which can affect the steering wheel angle comparison between the ABS module and the PSCM.
Diagnostic Aids
- Diagnostic Aids
- ABS module Diagnostic Trouble Codes (DTCs) C006B:xx and C0051:xx set when the comparison between the ABS module steering angle information and the PSCM steering angle information is outside of the expected range. Both mechanical and electrical components may cause this concern.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| ABS C0051:23 | Steering Wheel Position Sensor: Signal Stuck Low | This DTC sets if the steering wheel position signal from the PSCM is unchanged for a predetermined amount of time. |
| ABS C0051:27 | Steering Wheel Position Sensor: Signal Rate Of Change Above Threshold | This DTC sets if steering angle signal message sent from the PSCM indicates a higher rate of change than other ABS module inputs. |
| ABS C0051:28 | Steering Wheel Position Sensor: Signal Bias Level Out Of Range/Zero Adjustment Failure | This DTC sets when the ABS module detects the absolute value of the measured steering wheel position is greater than 720 degrees or if the calculated steering angle offset is greater than 15 degrees. |
| ABS C0051:54 | Steering Wheel Position Sensor: Missing Calibration | This DTC sets if the steering angle center position is not found and the speed or time limit is exceeded. This DTC automatically clears as soon as the center position is found. |
| ABS C0051:62 | Steering Wheel Position Sensor: Signal Compare Failure | This DTC sets when the ABS module detects a time-out failure, a quality factor failure, a plausibility failure of the yaw or active yaw signals or a plausibility failure of the wheel speed data. When this occurs, the steering angle center cannot be determined to be valid and the system triggers the steering angle center learning process. |
| ABS C0051:64 | Steering Wheel Position Sensor: Signal Plausibility Failure | This DTC sets when the ABS module detects the difference between the steering wheel angle signal and the calculated reference signal is too high or if the steering wheel angle sensor does not match other stability control sensor inputs (yaw rate, lateral acceleration, longitudinal acceleration, roll rate). |
| ABS C0051:67 | Steering Wheel Position Sensor: Signal Incorrect After Event | This DTC sets when the ABS module detects the center position of the steering wheel cannot be determined after 30 seconds of driving at a speed between 14.4 km/h (9 mph) and 48 km/h (30 mph). |
| ABS C0051:85 | Steering Wheel Position Sensor: Signal Above Allowable Range | This DTC sets when the ABS module detects the absolute value of the calculated steering wheel angle is greater than a predetermined threshold. |
| ABS C0051:86 | Steering Wheel Position Sensor: Signal Invalid | This DTC sets when the PSCM sends the defective status message due to an internal failure. |
| ABS C006B:00 | Stability System Active Too Long: No Sub Type Information | This DTC sets when the ABS module detects the ABS, ESC or RSC function has been active for longer than the various sensors indicate is necessary. |
| ABS C0051:29 | Steering Wheel Position Sensor: Signal Invalid | This DTC sets when the ABS module detects the absolute value of the calculated steering wheel angle is outside of predetermined thresholds. |
| ABS C0051:82 | Steering Wheel Position Sensor: Alive/Sequence Counter Incorrect/Not Updated | This DTC sets when expected steering wheel angle values from the PSCM are not received. |
| ABS C0051:96 | Steering Wheel Position Sensor: Component Internal Failure | This DTC sets when the PSCM sends the defective status message due to an internal failure. |
Possible Sources
- Tire pressure
- Wheel speed sensor
- Incorrectly mounted RCM
- Network communication concern
- Incomplete or incorrect stability control sensor calibration
- Wheels and tires
- Front suspension components
- Steering system components
- RCM
- PSCM
PINPOINT TESTS AG: ACCELERATOR PEDAL POSITION (APP) SENSOR (Diesel)