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
- Crank Request Signal
-
The scan tool displays Yes/No. The scan tool displays No until the ignition is placed into the START position then Yes is displayed.
- Electronics Battery FD
-
The scan tool displays 0-20 Volts. The scan tool displays the voltage as received on the battery positive voltage E circuit of the BCM.
- GEN F-Terminal Signal
-
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
-
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
-
The scan tool displays 0-20 Volts. The scan tool displays the voltage as received on the Ignition 1 circuit to the PCM.
- Inadvertent Power Relay
-
The scan tool displays On/Off. The scan tool displays On when the key is in the ACCY. or ON position.
- Load Management Relay
-
The scan tool displays On/Off. The scan tool displays On unless the BCM has entered Load Management or Idle Boost.
- Load Shed
-
The scan tool displays None/Load 1/Load 2/Load 3. The scan tool displays None unless Load management has been entered.
- Starter Enable Relay Circuit Status
-
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
-
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
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.