B1675
Seat Driver Occupied Input Circuit Short To Ground
Body Chassis/Safety Occupancy Sensing 🟢 Low — Fix at next service
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What This Actually Means
In plain language — no jargon

The driver seat occupancy sensor is detecting a short circuit to ground, like a wire touching metal when it shouldn't. The vehicle can't tell if someone is actually sitting in the driver's seat.

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Symptoms You May Notice
3 known symptoms for this code
Airbag warning light illuminated on dashboard
Seat belt warning system malfunction or disabled
Airbags may not deploy in a collision
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Embedded Systems Insight
What the ECU/ECM is actually computing

The ECU monitors the driver seat occupancy sensor's resistance circuit to determine if the seat is occupied. It expects a specific voltage signal; a short to ground causes the signal to drop to 0V or near-ground potential. When this occurs, the ECU cannot distinguish between an occupied and empty seat, triggering a fault.

Voltage & Parameter Thresholds

Parameter Normal Range Fault Condition
Seat Occupancy Signal Voltage 4.5-5.0V (occupied) or 0.5-1.5V (empty) Continuous 0V or short-to-ground signature
Circuit Resistance 8k-12k ohms (occupied) Less than 100 ohms or 0 ohms
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Diagnostic & DIY Fix Guide
Check these in order — from cheapest to most complex
1
Wiring harness connector
Inspect and reseat the driver seat occupancy sensor connector to eliminate corrosion or loose pins.
2
Wiring harness
Check the wiring from seat sensor to ECU for cuts, abrasion, or damaged insulation contacting metal seat frame.
3
Driver seat occupancy sensor
Replace the sensor if it shows visible damage or internal short when tested with a multimeter.