Driver Seat Lumbar Position Sensor Circuit
Table of contents
B1850 SATURN Possible Causes
- Faulty Driver Seat Lumbar Position Sensor
- Driver Seat Lumbar Position Sensor harness is open or shorted
- Driver Seat Lumbar Position Sensor circuit poor electrical connection
- Faulty Driver Seat Module (DSM)
How do I fix code B1850 SATURN?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the B1850 SATURN code
The cost of diagnosing the B1850 SATURN code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
B1850 SATURN Description
The Driver Seat Module (DSM) monitors the positions of most of the seat adjuster motors using hall effect type position sensors. The hall effect position sensors are supplied with battery positive reference and ground circuits from the DSM. The position sensor signal circuits are supplied battery positive voltage through a resistor then monitored within the DSM. During adjuster motor operation the hall effect position sensor provides a single pulse for every adjuster motor shaft rotation. The DSM counts the pulses from the position sensor signal circuits to determine the adjuster motor positions when storing or recalling memory seat position settings.