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.
Procedures For Selecting Crank Position Sensing Decode Mode
When you diagnose the crankshaft position sensors, it may be necessary to enable a specific decode mode (Angle, Time "A", or Time "B"). In order to enable a specific crank decode, using the scan tool, perform the following steps:
- Turn the ignition to the RUN/ON position.
- Select Engine Output Controls.
- Select Crank Position Sensing Decode Mode.
- Select the desired mode (Angle, Time "A", or Time "B") by pressing SELECT STATE.
- Command the decode mode by pressing COMMAND STATE.
The commanded state remains valid for the current ignition cycle. A specific decode mode can not be commanded with the engine running, or after commanding a desired decode mode. In order to command a different decode mode, you must cycle the ignition OFF and ON.
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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.