B1708
Seat Driver Recline Rearward 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 recline backward switch is sending a constant ground signal to the ECU, like a stuck button that never releases. This prevents the seat control module from properly detecting when you want to recline the seat backward.

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Symptoms You May Notice
3 known symptoms for this code
Seat recline backward function does not operate
Seat control warning light illuminated on dashboard
Unable to adjust seat position manually or via control module
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Embedded Systems Insight
What the ECU/ECM is actually computing

The ECU monitors the recline rearward switch circuit for proper voltage levels. When the switch is open, the circuit should read high voltage; when pressed, it should drop to ground. A short to ground keeps voltage low constantly, indicating a stuck or shorted switch.

Voltage & Parameter Thresholds

Parameter Normal Range Fault Condition
Switch Circuit Voltage High (5V or battery voltage when open); Low (0V when activated) Continuous low voltage (shorted to ground)
Circuit Resistance High impedance when open; Low when switch activated Constant low resistance indicating short
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Diagnostic & DIY Fix Guide
Check these in order — from cheapest to most complex
1
Recline rearward switch
Remove seat control panel and replace the faulty switch with a new one.
2
Wiring harness connector
Inspect and reseat the seat control module connector to eliminate contact corrosion.
3
Damaged wiring segment
Check wiring for cuts or abrasions near the seat mechanism and repair with heat shrink tubing.