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.
2007 Hummer H3 L5-3.7LFACTORY OEM SERVICE PROCEDURE
Scan Tool Data Definitions
Scan Tool Data Definitions
All Door Unlock Relay
- The scan tool displays On/Off. The door unlock relay output from the body control module (BCM), where the relay actuating to the unlock position is displayed as On.
Battery Voltage Signal
- The scan tool displays 9.0-15.0 volts. The state of the battery voltage supplied to the BCM.
Calibration ID
- The scan tool displays the calibration ID number of the BCM.
Door Lock Relay
- The scan tool displays On/Off. The door lock relay output from the BCM, where the relay actuating to the lock position is displayed as On.
Door Lock Relay Fdbk.
- The scan tool displays Active/Inactive. The door lock relay feedback input to the BCM, where the relay being actuated is displayed as Active.
Driver Door Ajar Sw.
- The scan tool displays Door Closed/Door Ajar. The driver door ajar switch input to the BCM, where a closed switch is displayed as Door Ajar.
End Model Part Number
- The scan tool displays the end model part number of the BCM.
Julian Date of Build
- The scan tool displays the date the BCM was built.
Passenger Door Ajar Sw.
- The scan tool displays Door Closed/Door Ajar. The passenger door ajar switch input to the BCM, where a closed switch is displayed as Door Ajar.
Software Part Number
- The scan tool displays the BCMs software revision part number.
Year Module Build
- The scan tool displays the year the BCM was built.
Factory Service Tools
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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.
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