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.