Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Scan Tool Data Definitions
- Battery Voltage
-
The scan tool displays 0-17 volts. The level of battery voltage available at the power steering control module (PSCM).
- Ignition Voltage
-
The scan tool displays 0-17 volts. The level of ignition voltage available at the PSCM.
- Motor Voltage +
-
The scan tool displays 0-17 volts. The amount of voltage being supplied to the EPS motor while turning right.
- Motor Voltage -
-
The scan tool displays 0-17 volts. The amount of voltage being supplied to the EPS motor while turning left.
- Steering Calibration
-
The scan tool displays 1-8. The number of the steering calibration the PSCM has chosen based on the VIN. All 8 of the steering calibrations for EPS are stored in the body control module (BCM).
- Steering Shaft Torque
-
The scan tool displays -20.70 N.m to +20.70 N.m (15.2 lb ft). The amount of torque being applied to the steering column shaft when turning the steering wheel. This signal voltage is from the detection coil of the torque sensor which is then converted to N.m by the PSCM. A - value indicates a left turn, a positive value indicates a right turn.
- Vehicle Speed
-
The scan tool displays 0-255 km/h (0-156 mph). The actual speed of the vehicle.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.