Scan Tool Data Definitions
The Electronic Suspension Control (ESC) Scan Tool Data Definitions contains a brief description of all ESC related parameters available on the scan tool.
Controller Battery Volts : The scan tool displays 0-26.0 volts. The battery voltage represents the system voltage measured at the controller battery input.
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 Damper Actuator : 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 Normal Force : The scan tool displays 20-80%. This percentage represents a measured level of the road surface sent from the Electronic Suspension Control (ESC) module to the Electronic Brake Control Module (EBCM). The EBCM uses this information to improve braking during various rough road conditions.
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 four position sensors.
Left Rear Damper Actuator : 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 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.
Lift/Dive 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.
Lift/Dive 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.
Right Front Damper Actuator : 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 Normal Force : The scan tool displays 20-80%. This percentage represents a measured level of the road surface sent from the Electronic Suspension Control (ESC) module to the Electronic Brake Control Module (EBCM). The EBCM uses this information to improve braking during various rough road conditions.
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 Rear Damper Actuator : 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 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.
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.
Vehicle Speed : The scan tool displays 0-255 km/h (0-159 mph). The ESC system obtains vehicle speed data from the PCM via Class 2.
| DTC | Definition |
|---|---|
| C0550 | ECU Malfunction - Internal Write/Checksum Malfunction |
| C0563 | Calibration ROM Checksum Error |
| C0577 | Left Front Solenoid Circuit Low |
| C0578 | Left Front Solenoid Circuit High |
| C0579 | Left Front Solenoid Circuit Open |
| C0582 | Right Front Solenoid Circuit Low |
| C0583 | Right Front Solenoid Circuit High |
| C0584 | Right Front Solenoid Circuit Open |
| C0587 | Left Rear Solenoid Circuit Low |
| C0588 | Left Rear Solenoid Circuit High |
| C0589 | Left Rear Solenoid Circuit Open |
| C0592 | Right Rear Solenoid Circuit Low |
| C0593 | Right Rear Solenoid Circuit High |
| C0594 | Right Rear Solenoid Circuit Open |
| C0615 | Left Front Position Sensor Malfunction |
| C0620 | Right Front Position Sensor Malfunction |
| C0625 | Left Rear Position Sensor Malfunction |
| C0630 | Right Rear Position Sensor Malfunction |
| C0635 | Left Front Normal Force Circuit Malfunction |
| C0638 | Left Front Normal Force Circuit High |
| C0640 | Right Front Normal Force Circuit Malfunction |
| C0643 | Right Front Normal Force Circuit High |
| C0665 | Chassis Pitch Signal Circuit |
| C0690 | Damper Control Relay Circuit Malfunction |
| C0691 | Damper Control Relay Circuit Range |
| C0693 | Damper Control Relay Circuit High |
| C0696 | Position Sensor Overcurrent (5 Volt Supply) |
| C0710 | Steering Position Signal Malfunction |
| C0896 | Electronic Suspension Control (ESC) Voltage Is Outside The Normal Range Of 9-15.5 Volts |
| C1252 | Left Front Normal Force Malfunction |
| C1253 | Right Front Normal Force Malfunction |