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.
BCM Scan Tool Data Definitions
- Front Wiper Switch
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The scan tool displays ON or OFF. When the windshield wiper/washer switch is turned to the mist, wash, low, or high positions the scan tool displays ON. When the switch is turned to the delay positions from low the scan tool continues to display ON. Anytime the switch is in the off position the scan tool displays OFF.
- Headlamp Wash (input)
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The scan tool displays ON or OFF. The tool displays ON when the output is active and OFF when the output is inactive.
- Headlamp Wash (output)
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The scan tool displays ON or OFF. The tool displays ON when the output is active and OFF when the output is inactive.
- Rear Washer Requested
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The scan tool displays YES or NO. The scan tool displays YES when it has received a confirmation message from LGM/EGM to activate the rear washer.
NO RELATED
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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.