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: Inputs
- Cargo Door Ajar Switch
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The scan tool displays Inactive when the applicable door is fully closed or Active when the door is open or ajar.
- Courtesy Lamp Switch
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The scan tool displays the position of the courtesy lamp switch. The scan tool displays Active when the switch is turned ON. The BCM uses this data in controlling the operation of the courtesy lamps.
- Driver Door Ajar Switch
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The scan tool displays Off when the applicable door is fully closed or On when the door is open or ajar.
- Flash to Pass Switch
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The scan tool displays the position of the flash to pass switch. The scan tool displays On when the switch is pulled to activate the high beams momentarily while the switch is held.
- Front Fog Lamp Switch
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The scan tool the front fog lamp switch. The scan tool displays ACTIVE or INACTIVE when the switch is depressed. The body control module (BCM) uses this data in controlling the operation of the front fog lamps.
- Front Wipers Active
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The scan tool displays the state of the wiper motor. The scan tool displays Yes when the wipers are in operation after approximately the first 3 cycles of the wiper blades.
- Headlamp Switch
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The scan tool displays the position of the headlamp switch. The scan tool displays Active when the headlamp switch is in the ON position. The BCM uses this data in controlling the operation of the headlamps.
- High Beam Switch
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The scan tool displays the position of the high beam switch. The scan tool displays On when the switch is used to activate the high beams.
- Ignition 0
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The scan tool displays the position of the ignition switch. The scan tool displays On when the ignition switch is in the RUN or CRANK position.
- Ignition 1
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The scan tool displays the position of the ignition switch. The scan tool displays On when the ignition switch is in the RUN or CRANK position.
- Ignition Accessory
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The scan tool displays the position of the ignition switch. The scan tool displays Active when the ignition switch is in the ACCY position only.
- Inadvertent Power Relay
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The scan tool displays the state of the inadvertent power battery rundown protection feature of the BCM. The scan tool displays On when all inadvertent power circuits are functioning normally.
- Interior Lamp Defeat Switch
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The scan tool displays the position of the courtesy/dome lamp override switch. The scan tool displays On when the switch is activated requesting the BCM to override the normal interior lamp activation inputs and deactivate the interior lighting.
- Key in Ignition
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The scan tool displays Yes when the key has been inserted into the ignition switch. The scan tool displays No after the key has been removed.
- Left Rear/Rear Cargo Door Switch
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The scan tool displays Off when the applicable door is fully closed or On when the door is open or ajar.
- Park Lamp Switch
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The scan tool displays the position of the park lamp switch. The scan tool displays ON when the park lamp switch is in the ON position. The BCM uses this data in controlling the operation of the park lamps.
- Passenger Door Ajar Switch
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The scan tool displays Off when the applicable door is fully closed or On when the door is open or ajar.
- Right Rear Door Ajar Switch
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The scan tool displays Off when the applicable door is fully closed or On when the door is open or ajar.
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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.