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
- Accessory Relay Command
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The scan tool displays the state of the accessory relay command.
- Battery Voltage Signal
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The scan tool displays the vehicle voltage.
- Ignition Mode Switch
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The scan tool displays the ignition switch voltage signal. This signal is derived from the ignition Off/Run/Crank circuit.
- Ignition Switch Accessory
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The scan tool displays the state of the ignition switch accessory circuit.
- Ignition Switch Run/Crank
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The scan tool displays the state of the ignition switch Run/Crank circuit.
- Key In Ignition Cylinder
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The scan tool displays whether or not the key is in the ignition cylinder.
- Power Mode
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The scan tool displays the vehicle power mode.
- Run Relay Command
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The scan tool displays the state of the Run relay.
- Run Crank Relay Command
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The scan tool displays the state of the Run Crank relay.
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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.