B3920 Saturn Code - Seat Motors Group 1 Common Circuit
Quick Answer
The Seat Memory Control Module controls the seat, lumbar, and adjustable pedal motors via half bridges that are connected to power rails internal to the module. Common causes include Faulty Seat, Lumbar, or Adjustable Pedal Motors, Seat, Lumbar, or Adjustable Pedal Motors harness is open or shorted, Seat, Lumbar, or Adjustable Pedal Motors circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- B3920 Saturn indicates Seat Motors Group 1 Common Circuit.
- Common causes
- Common causes include Faulty Seat, Lumbar, or Adjustable Pedal Motors, Seat, Lumbar, or Adjustable Pedal Motors harness is open or shorted, Seat, Lumbar, or Adjustable Pedal Motors circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code B3920 Saturn Description
When a power seat, lumbar, or adjustable pedal switch is pressed or when a memory recall is requested, each seat motor receives battery voltage and ground from the seat memory control module via the motor control circuits. All motors are reversible, so the direction the motor rotates depends on which control circuit voltage is applied and which control circuit ground is applied. When the switch is operated in the opposite direction, the module reverses the polarity and applies voltage and ground to the opposite circuits to move the seat in the opposite direction.
The Diagnostic Trouble Code (DTC) sets when the voltage on any power rail 1 motor control circuit exceeds 2.78 volts for 100 ms or is below 1.47 volts for 100 ms.
What are the Possible Causes of the DTC B3920 Saturn?
- Faulty Seat, Lumbar, or Adjustable Pedal Motors
- Seat, Lumbar, or Adjustable Pedal Motors harness is open or shorted
- Seat, Lumbar, or Adjustable Pedal Motors circuit poor electrical connection
- Faulty Seat Memory Control Module
How to Fix the DTC B3920 Saturn?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
B3920 02 Group 1 Seat Motors Circuit Shorted to Ground
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B3920 Saturn code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about B3920 Saturn Code
1. What are the common symptoms of OBDII code B3920 Saturn related to the Seat Motors Group 1 Common Circuit?
- Common symptoms include non-functioning seat motors, inability to adjust the seat position, and erratic movement of the seat.
2. What are the possible causes of OBDII code B3920 Saturn for the Seat Motors Group 1 Common Circuit?
- Potential causes include a faulty seat motor, damaged wiring or connectors in the seat motor circuit, or a malfunctioning control module.
3. How can I diagnose the OBDII code B3920 Saturn related to the Seat Motors Group 1 Common Circuit?
- Diagnosis typically involves using a scan tool to read the fault code, inspecting the seat motor and related wiring for damage, and testing the control module for proper function.
4. Can I repair OBDII code B3920 Saturn myself?
- Depending on your skill level and access to tools, you may be able to repair this issue yourself by replacing a faulty seat motor, repairing damaged wiring, or resetting the control module.
5. Are there any tips for repairing OBDII code B3920 Saturn for the Seat Motors Group 1 Common Circuit?
- It's recommended to check for any loose or corroded connections in the seat motor circuit, ensure all wiring is intact, and follow the manufacturer's diagnostic procedures for a thorough repair.
6. Is it safe to continue driving with OBDII code B3920 Saturn triggered?
- It is not recommended to drive with this code triggered, as it can affect the functionality of your seat adjustment system and compromise your driving comfort and safety.
7. How much does it typically cost to repair OBDII code B3920 Saturn related to the Seat Motors Group 1 Common Circuit?
- The cost of repair can vary depending on the specific issue causing the code, but it may involve replacing a seat motor, repairing wiring, or reprogramming the control module.
8. Can OBDII code B3920 Saturn affect other systems in the vehicle?
- While this code specifically relates to the Seat Motors Group 1 Common Circuit, it's possible for electrical issues to impact other systems in the vehicle, so prompt repair is recommended.
9. Are there any preventive measures to avoid OBDII code B3920 Saturn in the future?
- Regularly inspecting and maintaining your vehicle's seat adjustment system, ensuring proper wiring connections, and addressing any issues promptly can help prevent this code from recurring.
10. How long does it typically take to repair OBDII code B3920 Saturn for the Seat Motors Group 1 Common Circuit?
- The repair time can vary depending on the exact cause of the code and the complexity of the fix, but it may range from a few hours to a full day at a repair shop.
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