B1705
Seat Driver Recline Rearward Switch Circuit Failure
Body Chassis/Safety Seat Controls 🟢 Low — Fix at next service
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What This Actually Means
In plain language — no jargon

The seat's rearward recline button isn't communicating properly with the car's computer, like a broken remote control that can't send its signal to the TV. The circuit connecting the switch to the seat control module has an electrical problem preventing normal operation.

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Symptoms You May Notice
3 known symptoms for this code
Driver seat recline backward function doesn't work
Recline button unresponsive or intermittent
Seat control warning light illuminated on dashboard
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Embedded Systems Insight
What the ECU/ECM is actually computing

The seat control module monitors voltage and continuity in the rearward recline switch circuit. It expects a specific voltage signal when the switch is pressed and released, measuring circuit resistance and signal integrity.

Voltage & Parameter Thresholds

Parameter Normal Range Fault Condition
Switch Signal Voltage 12V when pressed, 0V when released No voltage change or stuck voltage level
Circuit Resistance Less than 5 ohms when conducting Greater than 10 ohms or open circuit
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Diagnostic & DIY Fix Guide
Check these in order — from cheapest to most complex
1
Seat recline switch
Locate and inspect the rearward recline button for physical damage, corrosion, or stuck contacts, then clean or replace if worn.
2
Electrical connectors and wiring
Check all seat module connectors under the driver seat for loose connections, corrosion, or damaged pins and reseat firmly.
3
Seat control module
If switch and wiring are good, the seat control module may need reprogramming or replacement by a dealer.