ESC Scan Tool Data Definitions

The ESC Scan Tool Data Definitions contain a brief description of all the scan tool parameters. This list is in alphanumeric order.

All Shock Solenoids: The scan tool displays 0-100%. This percentage represents the commanded state of the shock absorber solenoids. When the ESC special functions is selected on the scan tool menu and the all shock solenoids is commanded ON, the percentage will increase. When the all shock solenoids is commanded OFF, the percentage will decrease.

Battery Voltage: The scan tool displays 0-26.0 volts. The battery voltage represents the system voltage measured at the controller battery input.

Chassis Pitch Input Change: The scan tool displays Changed or Unchanged. The ESC system receives chassis pitch input from the PCM. When there is a change in chassis pitch status , the scan tool will display Changed. If there is not change, the scan tool will display Unchanged.

Chassis Pitch Input Status: The scan tool displays Active or Inactive. The ESC system receives chassis pitch input from the PCM. The scan tool will display Active when the ESC system detects a change in chassis pitch status. When there is no change in chassis pitch, the scan tool will display Inactive.

Chassis Pitch Signal: The ESC receives chassis pitch input from the PCM. When the ESC Special Functions is selected on the scan tool menu and the chassis pitch signal is commanded ON, the PCM sends the chassis pitch signal to the ESC system which allows the shock absorbers to set at the firm setting.

DSP Software Version: The scan tool displays the controller DSP software version number for service identification.

EEPROM Calibration ID: The scan tool displays the controller EEPROM calibration ID number for service identification.

GM Part Number: The scan tool displays the controller part number for service identification.

GMSCM Software Version: The scan tool displays the controller GMSCM software version number for service identification.

Left Front Position Sensor: The scan tool displays 0-5.0 volts. The position sensor is a variable resistor which changes with vehicle trim height. The ESC system uses this voltage reading to determine different road and driving conditions. The ESC system adjusts the damping level in each shock absorber based upon the voltage level received back from all 4 position sensors.

Left Front Shock Level: The scan tool displays 0-100%. This percentage represents the commanded state of the shock absorbers. When the ESC system commands the shock absorbers ON, the percentage will increase. When the ESC system commands the shock absorbers OFF, the percentage will decrease.

Left Front Shock Solenoid: The scan tool displays 0-100%. This percentage represents the commanded state of the shock absorber solenoid. When the ESC special functions is selected on the scan tool menu and the left front shock solenoid is commanded ON, the percentage will increase. When the left front shock solenoid is commanded OFF, the percentage will decrease.

Left Rear Position Sensor: The scan tool displays 0-5.0 volts. The position sensor is a variable resistor which changes with vehicle trim height. The ESC system uses this voltage reading to determine different road and driving conditions. The ESC system adjusts the damping level in each shock absorber based upon the voltage level received back from all 4 position sensors.

Left Rear Shock Level: The scan tool displays 0-100%. This percentage represents the commanded state of the shock absorbers. When the ESC system commands the shock absorbers ON, the percentage will increase. When the ESC system commands the shock absorbers OFF, the percentage will decrease.

Left Rear Shock Solenoid: The scan tool displays 0-100%. This percentage represents the commanded state of the shock absorber solenoid. When the ESC special functions is selected on the scan tool menu and the left rear shock solenoid is commanded ON, the percentage will increase. When the left rear shock solenoid is commanded OFF, the percentage will decrease.

Steering Position PWM: The scan tool displays 0-10 ms. This PWM signal is sent by the ABS system which changes when the steering wheel is turned. The ESC system uses this PWM signal to determine the shock absorber control levels and will command a more firm setting if the vehicle is turning.

Right Front Position Sensor: The scan tool displays 0-5.0 volts. The position sensor is a variable resistor which changes with vehicle trim height. The ESC system uses this voltage reading to determine different road and driving conditions. The ESC system adjusts the damping level in each shock absorber based upon the voltage level received back from all four position sensors.

Right Front Shock Level: The scan tool displays 0-100%. This percentage represents the commanded state of the shock absorbers. When the ESC system commands the shock absorbers ON, the percentage will increase. When the ESC system commands the shock absorbers OFF, the percentage will decrease.

Right Front Shock Solenoid: The scan tool displays 0-100%. This percentage represents the commanded state of the shock absorber solenoid. When the ESC special functions is selected on the scan tool menu and the right front shock solenoid is commanded ON, the percentage will increase. When the right front shock solenoid is commanded OFF, the percentage will decrease.

Right Rear Position Sensor: The scan tool displays 0-5.0 volts. The position sensor is a variable resistor which changes with vehicle trim height. The ESC system uses this voltage reading to determine different road and driving conditions. The ESC system adjusts the damping level in each shock absorber based upon the voltage level received back from all four position sensors.

Right Rear Shock Level: The scan tool displays 0-100%. This percentage represents the commanded state of the shock absorbers. When the ESC system commands the shock absorbers ON, the percentage will increase. When the ESC system commands the shock absorbers OFF, the percentage will decrease.

Right Rear Shock Solenoid: The scan tool displays 0-100%. This percentage represents the commanded state of the shock absorber solenoid. When the ESC special functions is selected on the scan tool menu and the right rear shock solenoid is commanded ON, the percentage will increase. When the right rear shock solenoid is commanded OFF, the percentage will decrease.

Vehicle Speed: The scan tool displays 0-255 km/h (0-159 mph). The ESC system obtains vehicle speed data from the PCM on a dedicated input. The PCM is responsible for calculating correct vehicle speed data.