GM Service Manual Online
For 1990-2009 cars only
Analog Steering Wheel Position Input: The scan tool displays 0.34-4.74 volts. The amount of voltage from the steering position sensor to the Electronic Brake Control Module (EBCM).

Ignition Power: The scan tool displays 0-17.0 volts. The level of ignition voltage at the EBCM.

LF Wheel Speed: The scan tool displays 0-255 km/h (0-159 mph). The actual speed of the left front wheel.

LR Wheel Speed: The scan tool displays 0-255 km/h (0-159 mph). The actual speed of the left rear wheel.

Magna Steer Commanded Current: The scan tool displays -2.00 to 3.00 amps. The amount of current that the EBCM is commanding to the Variable Effort Steering (VES) actuator.

Magna Steer 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.

Magna Steer Feedback Current: The scan tool displays 2.00 to 3.00 amps. The absolute, or posotive amount of feedback current from the VES actuator to the EBCM. Thus the - symbol is not displayed.

RF Wheel Speed: The scan tool displays 0-255 km/h (0-159 mph). The actual speed of the right front wheel.

RR Wheel Speed: The scan tool displays 0-255 km/h (0-159 mph). The actual speed of the right rear wheel.

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