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
Use the scan tool data display values and definitions information in order to assist in diagnosing vehicle malfunctions. Compare the vehicles actual scan tool data with the typical data display value table information. Use the information in order to aid in understanding the nature of the concern when the vehicle data does not match the typical data display values.
The scan tool data values were taken from a known good vehicle under the following conditions:
- The ignition switch is in the ON position.
- The engine is not running.
- The vehicle is in PARK.
- Accy. Relay Command
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The scan tool displays the commanded state of the RAP relay. The scan tool displays ON when the BCM provides ground to the RAP relay control circuit.
- Battery Voltage Signal
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This parameter displays the amount of battery voltage available to the body control module (BCM).
- Calibration ID
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This parameter displays the identification number of the calibrations in the BCM.
- Crank Voltage
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This parameter displays the voltage read by BCM, through Ignition Off/Run/Crank signal. For the values expected refer to Power Mode Mismatch .
- Driver Door Ajar Sw.
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This parameter displays the status of the door.
- End Model Part Number
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This parameter displays the part number of the BCM.
- Ignition Accessory
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The BCM uses this data in order to determine the position of the ignition switch. Active is displayed when the ignition switch is in the Run or Accy positions.
- Ignition 1 Run/Crank
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The BCM uses this data in order to determine the position of the ignition switch. Active is displayed when the ignition switch is in the Run or Crank positions.
- Ignition 3
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The scan tool displays the state of the Ignition 3 output.
- Ign. Off/Run/Crank
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The BCM uses this data in order to determine the position of the ignition switch. Active is displayed when the ignition switch is in the Off, Run or Crank positions.
- Julian Date of Build
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The day of the year that the BCM was built.
- Passenger Door Ajar Sw.
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This parameter displays the status of the door.
- Software Part Number
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This parameter displays the part number of the software that is in the BCM.
- Year Module Built
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The year that the BCM was built.
Use the Manual With the Right Hardware
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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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