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
Software Part Number: Part number of component program or the ECU. Used to determine applicability to vehicle RPO content.
Accessory 1: Input from ignition switch ACCESSORY circuit. Used to determine power mode. Hot in ACCESSORY and RUN.
Battery Voltage: Direct line from the battery used to monitor voltages.
Battery Power 2: High current voltage supply to the control module for powering up the unit.
Battery Power 3: High current voltage supply to the control module for powering up the unit.
Crank: Input from ignition switch closed to battery voltage when the ignition switch is in the CRANK position.
Door Jamb Switch: Input showing state of the passenger doors.
Driver Door Switch: Input from the driver door indicating door status.
Ground 2: High current ground circuit to the control module.
Ignition 0: Input to the control module from the ignition switch indicating the Ignition 0 position. Switch closed (HOT) in ignition switch positions Unlock, Accessory, Run, Crank.
Ignition 1: Input to the control module from the ignition switch indicating the Ignition 1 position. Switch closed (HOT) in ignition switch positions Run, Crank.
Inadvertent Power Output: Input indicating the sensed state of the inadvertent power request circuit.
Inadvertent Power Output: Output indicating the state as commanded by the control module.
Key In Ignition: Input from ignition switch indicating that the ignition key is inserted into the ignition switch. HOT with key in ignition and ignition switch position LOCK.
RAP Output: Output indicates state that the control module has commanded.
Trunk Ajar Switch: Indicates state of switch used to control lamp in trunk and IPC indicator.
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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.