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.
Tests AK: LFC 51/DTC C1981 - Front Drivers Seat Track Position Sensor Circuit Fault
2005 Ford Freestyle AWD V6-3.0L VIN 1SECTION Tests AK: LFC 51/DTC C1981 - Front Drivers Seat Track Position Sensor Circuit Fault
PINPOINT TEST AK: LFC 51/DTC C1981 - FRONT DRIVERS SEAT TRACK POSITION SENSOR CIRCUIT FAULT
Normal Operation
The restraints control module (RCM) monitors the driver seat track position sensor circuits. If the RCM detects a open or short to battery, it will store diagnostic trouble code (DTC) C1981 in memory and flash lamp fault code (LFC) 51 (or higher priority code if one exists) on the air bag indicator.
Possible Causes
A driver seat track position sensor open circuit or short to battery fault can be caused by:
- damaged wiring, terminals or connectors.
- RCM is faulted.
AK1-AK2:
AK2-AK3:
AK4-AK7:
Normal Operation
The restraints control module (RCM) monitors the driver seat track position sensor circuits. If the RCM detects a open or short to battery, it will store diagnostic trouble code (DTC) C1981 in memory and flash lamp fault code (LFC) 51 (or higher priority code if one exists) on the air bag indicator.
Possible Causes
A driver seat track position sensor open circuit or short to battery fault can be caused by:
- damaged wiring, terminals or connectors.
- RCM is faulted.
RENDER: 1.0x
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.