B1716
Seat Driver Front Down Switch Circuit Short To Ground
Body Chassis/Safety Seat Controls 🟢 Low — Fix at next service
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What This Actually Means
In plain language — no jargon

The driver's seat down button circuit is shorted to ground, like a light switch stuck in the ON position. The seat control module can't properly detect when you press the button because electricity is taking a shortcut.

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Symptoms You May Notice
3 known symptoms for this code
Seat won't move down or moves unexpectedly
Seat control warning light on dashboard
Other seat functions may be affected or disabled
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Embedded Systems Insight
What the ECU/ECM is actually computing

The ECU monitors the voltage signal from the driver's front seat down switch. It expects a high voltage (around 12V) when the switch is released and a low voltage (near 0V) when pressed. A short to ground keeps the signal at 0V continuously, which the ECU detects as an abnormal fault condition.

Voltage & Parameter Thresholds

Parameter Normal Range Fault Condition
Switch Signal Voltage 12V (released) / 0V (pressed momentarily) Constant 0V or near-ground potential
Circuit Resistance High resistance (open) when released Very low resistance to ground (short)
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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 seat control module connector to eliminate poor contact causing false shorts.
2
Driver seat down switch assembly
Replace the faulty down switch if internal contacts are shorted or the switch is mechanically stuck.
3
Seat control wiring
Repair or replace damaged wiring in the seat circuit harness if insulation is compromised or wires are pinched.