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
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The scan tool displays 0-20 Volts. The scan tool displays the voltage as received by the Module.
- Battery Voltage Signal
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The scan tool displays 0-20 Volts. The scan tool displays the voltage as received by the Module.
- Crank Request Signal
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The scan tool displays Yes/No. The scan tool displays No until the ignition is placed into the START position then Yes is displayed.
- GEN F-Terminal Signal
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The scan tool displays 0-100%. The scan tool displays 0-100% until the engine is started and the engine control module (ECM) receives a signal from the generator then OK is displayed.
- GEN L-Terminal Command
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The scan tool displays 0-100%. The scan tool displays the percentage of the output voltage of the generator.
- GEN L-Terminal Circuit Status
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The scan tool displays Incomplete, Short Gnd / Open, Short to B+, or OK. The scan tool displays the status of the GEN-L Terminal circuit.
- Ignition 1 Signal
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The scan tool displays 0-20 Volts. The scan tool displays the voltage as received on the Ignition 1 circuit to the module.
- Ignition Accessory Signal
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The scan tool displays ON/OFF. The scan tool displays if the ignition 0 signal is On or OFF.
- Ignition Voltage Signal
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The scan tool displays Present/Not Present. The scan tool displays the status of the ignition voltage signal on the theft deterrent module (TDM).
- PNP Switch (If Equipped)
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The scan tool displays Park/Neutral or In Gear. The scan tool displays the position of the transmission setting.
- Start Disabled
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The scan tool displays YES/NO. The scan tool displays YES if the TDM has disabled the starting function.
- Starter Relay Command
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The scan tool displays ON/OFF. The scan tool displays Off until the ignition is placed into the CRANK position, then it reads On.
- Starter Relay Circuit Status
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The scan tool displays Incomplete, Short Gnd/Open, Short to B+, or OK. The scan tool displays the status of the STRTR relay.
- Start Up State of Charge
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The scan tool displays 1-100%. The scan tool displays the state of charge at initial key up.
- Prev. State of Charge
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The scan tool displays 0-100%. The scan tool displays the state of charge from the previous ignition cycle.
- State of Charge
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The scan tool displays 0-100%. The scan tool displays the present state of charge.
- State of Charge Low
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The scan tool displays YES/NO. The scan tool displays YES if the present state of charge is low.
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.