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 Signal
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The scan tool displays 6.5-16.5 volts. The amount of battery voltage available at the Power Steering Control Module (PSCM).
- Calculated System Temperature
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The scan tool displays ambient temperature to 135°. The estimated power steering system temperature calculated from a combination of commanded motor current, voltage levels and input from a temperature sensor internal to the PSCM.
- Motor Command
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The scan tool displays 0-65 amps. The amount of current the PSCM is commanding to the power steering motor.
- Steering Shaft Torque
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The scan tool displays 14.20 to -14.20 N.m (10.50 ft-lbs), the amount of torque being applied to the steering column shaft. A positive value indicates a right turn, a negative value indicates a left turn.
- Steering Position Sensor Signal 1
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The scan tool displays 0.0-5.0 volts, the amount of signal voltage from the steering wheel position sensors signal 1 circuit.
- Steering Position Sensor Signal 2
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The scan tool displays 0.0-5.0 volts, the amount of signal voltage from the steering position sensor's signal 2 circuit.
- Steering Tuning
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The scan tool displays 1, or 2. The number of the steering tuning selected for the vehicle. Electric power steering (EPS) requires different tuning for different levels of assist depending on vehicle content. Steering tuning 1 is for vehicles with a 4 cyl engine, steering tuning 2 is for vehicles with a 6 cyl engine, steering tuning 3 is for the extended sedan.
- Steering Wheel Position
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The scan tool displays 562° to -562°. The amount of degrees the steering wheel has been turned from center. A positive value indicates a right turn, a negative value indicates a left turn.
- Torque Sensor Signal 1
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The scan tool displays 0.25-4.75 volts, the amount of signal voltage from the torque sensor's signal 1 circuit.
- Torque Sensor Signal 2
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The scan tool displays 0.25-4.75 volts, the amount of signal voltage from the torque sensor's signal 2 circuit.
- Vehicle Speed
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The scan tool displays 0-255 km/h (0-158 mph), the actual speed of the vehicle.
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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.