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 the value of the battery voltage.
Ignition 1: The scan tool displays Active when the ignition switch is in the RUN or CRANK position.
Ignition 3: The scan tool displays Active when the ignition switch is in the RUN position only.
Ignition Power Mode: The scan tool displays the position of the ignition switch. The scan tool displays Off, Run, Crank and Unknown. The word Unknown is displayed when the BCM can not determine the position of the ignition switch.
Julian Date: The scan tool displays the date that the body control module (BCM) was manufactured.
Key in Ignition: The scan tool displays Yes when the ignition key is fully inserted into the ignition switch cylinder. The BCM uses this data to control the chime feature.
Module Part Number: The scan tool displays the part number assigned to the BCM that is currently in the vehicle.
Software Design Suffix: The scan tool displays the version of the software part number in the BCM.
Software Part Number: The scan tool displays the software identification number in the BCM.
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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.