K43 Power Steering Control Module: Scan Tool Information
WARNING: This page is about a different car, the 2021 GMC Sierra 3500 HD and 2021 GMC Sierra 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
Power Steering Control Module Scan Tool Data Parameters
| Parameter | System State | Expected Value | Description |
|---|---|---|---|
| Operating Conditions: Ignition ON | |||
| Ignition Cycle Counter | - | Varies | This displays the number of ignition cycles. |
| ECU Internal Temperature | - | Varies | This displays ° C. This is the current internal temperature of the ECU |
| Steering Wheel Angle | - | Varies | This displays Degrees. This displays the current steering wheel angle in degrees. |
| EPS Motor Overload Protection Counter | - | Varies | This displays counts. This displays the Electric Power Steering Motor Overload Protection Incidents counter. |
| EPS System Status | - | True/False | Indicates the status of Vehicle Speed Validity, AHA Calibration, and AHA Setup Procedure. |
| Engine Speed | - | 0 RPM | This displays RPM. This is the current engine speed from the ECM. |
| Vehicle Speed Low Resolution | - | 0 Km/h (0 MPH) | This displays km/h (mph). This is the current vehicle speed. |
| Vehicle Speed Medium Resolution | - | 0 Km/h (0 MPH) | This displays km/h (mph). This is the current vehicle speed. |
| Driver Mode Control State | - | No Actcion/Performance Mode 1 - 7 | This displays the current drive mode. |
| Steering Wheel Angle Gradient | - | Varies | This displays degrees/sec. This is the rate at which the steering angle is changing. |
| AHA Coil Current Commanded | - | Varies | This displays the amount of current commanded by the AHA coil.. |
| AHA Coil Current Measured | - | Varies | This displays the actual measured current of the AHA coil. |
| AHA Right Hydraulic Pressure | - | Varies | This is the current pressure (Bar) of the right side of the AHA system. |
| AHA Left Hydraulic Pressure | - | Varies | This is the current pressure (Bar) of the left side of the AHA system. |
| AHA Differential Hydraulic Pressure | - | Varies | This is the current pressure (Bar) of the differential in the AHA system. |
| AHA Pull Hydraulic Pressure Compensation Value | - | Varies | This displays the AHA pull hydraulic pressure compensation value (Bar). |
| Time Since Ignition On | - | Varies | This displays the time (ms) since the ignition was switched to ON. |
| System Power Mode | - | OFF/ACC/RUN/Crank Request | This displays the current power mode. |
| Battery Voltage | - | Varies | This displays the current battery voltage. |
| Engine Running Status | - | True/False | This displays the engine running status. |
| AHA System Status | - | Disable/Off/Operate/Warm Initialization | This displays the current status of the AHA system |
Power Steering Control Module Scan Tool Output Controls
| Output Control | Description |
|---|---|
| Cancel All Active Device Controls | Command to cancel any active device controls. |
| Steering Assist Control | Command to enable or disable Power Assist and to change Power Assist Mode. |
| Reset Adaptive Data | Command to reset adaptive parameters to default/unlearned values. The AHA ECU shall reset both short and long term pull compensation values. |
| Clear End of Line Gear Parameters | Command to clear the end of line gear parameters to their default values. |
| Pressure Sensor Trim | Command to trim the pressure sensor. Set Trim shall set the pressure trim value to the current Pressure 1 sensor input and Pressure 2 sensor input and set the pressure trim performed flag to indicate that a trim has been performed. |
| AHA Device Controls | Ignition cycle values while this command is active shall not be permanently stored. Values will only be retained for one ignition cycle. |
| System Basic Functions | Command to disable all device outputs of the AHA ECU. |