GM Service Manual Online
For 1990-2009 cars only
Ignition Voltage Signal: The scan tool displays 0-17 volts. The amount of ignition voltage at the EBCM.

Steering Position Sensor: The scan tool displays -720 to 720  degrees. The actual position of the steering wheel in degrees from center. Negative numbers represent steering wheel rotation to the left , positive numbers indicate steering wheel rotation to the right, with 0 degrees representing the steering wheel in the centered position.

Switched System Battery Voltage Signal: The scan tool 0-17 volts. The level of internal EBCM voltage available to the VES actuator when the ABS relay is energized.

Vehicle Speed: The scan tool displays 0-255 km/h (0-159 mph). The actual speed of the vehicle represented as an average of the wheel speed sensors.

VES Actuator Commanded : The scan tool displays -3.00 to 3.00 amps. The amount of current the EBCM is commanding to the VES actuator.

VES Failed: The scan tool displays Yes or No. Yes indicates a malfunction has been detected within the VES system. No indicates the VES system is operating to specification.

VES Actuator Feedback : The scan tool displays -3.00 to 3.00 amps. The amount of current returning from the VES actuator to the EBCM.