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 on the battery positive voltage circuit of the Module or the 72-08 battery voltage message from the DIM over class 2 lines.
- GEN F-Terminal Signal
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The scan tool displays 0-100%. The scan tool displays 0-10% until the engine is started and the PCM receives a signal from the generator then OK is displayed.
- GEN L-Terminal Signal Command
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The scan tool displays On/Off. The scan tool displays Off until the engine is running, then the PCM supplies then the percentage value varies depending on electrical loads
- 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 PCM.
- IMS
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The scan tool displays Park, Park/Reverse, Reverse, Reverse/Neutral, Neutral, Neutral/Drive 4, Drive 4, Drive 4/Drive 3, Drive 3, Drive 3/Drive 2, Drive 2, Drive 2/Drive 1, Drive 1, INVALID, and OPEN. The scan tool displays the physical position of the Internal Mode Switch (IMS) of the transmission.
- Inadvertent Power Relay
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The scan tool displays On/Off. The scan tool displays On when the key is in the ACCY. or ON position.
- Load Shed Lvl.1 R. Defog.
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The scan tool displays On/Off. The scan tool displays Off unless the RIM has entered level 1 of load management and commanded the rear defrost OFF.
- Load Shed Lvl.1 Heated Seats.
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The scan tool displays On/Off. The scan tool displays Off unless the RIM has entered level 1 of load management and commanded the Heated Seats OFF
- Load Shed Lvl.2 R. Defog.
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The scan tool displays On/Off. The scan tool displays Off unless the RIM has entered level 2 of load management and commanded the rear defrost OFF.
- Load Shed Lvl.2 Heated Seats.
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The scan tool displays On/Off. The scan tool displays Off unless the RIM has entered level 2 of load management and commanded the Heated Seats OFF.
- Starter Enable Relay Circuit Status
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The scan tool displays Fault/OK/Invalid State. The scan tool displays Fault until the ignition is placed into the START position then OK is displayed.
- 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.
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.