U1520 Code - Driver/Passenger Seat Memory Control Module Lost Communication With Driver/Passenger Seat Bolster Memory Control Module On LIN Bus
Quick Answer
The U1520 code indicates that the Driver/Passenger Seat Memory Control Module has lost communication with the Driver/Passenger Seat Bolster Memory Control Module on the LIN (Local Interconnect Network) bus. Common causes include Faulty Driver/Passenger Seat Memory Control Module, Faulty Driver/Passenger Seat Bolster Memory Control Module, Damaged wiring or connectors in the LIN bus network. 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
- U1520 indicates Driver/Passenger Seat Memory Control Module Lost Communication With Driver/Passenger Seat Bolster Memory Control Module On LIN Bus.
- Common causes
- Common causes include Faulty Driver/Passenger Seat Memory Control Module, Faulty Driver/Passenger Seat Bolster Memory Control Module, Damaged wiring or connectors in the LIN bus network.
- 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.
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Code U1520 Description
The U1520 code indicates that the Driver/Passenger Seat Memory Control Module has lost communication with the Driver/Passenger Seat Bolster Memory Control Module on the LIN (Local Interconnect Network) bus. In modern vehicles, LIN bus systems are used to communicate between various modules and components within the vehicle. The Seat Memory Control Module is responsible for storing and recalling the preferred seat positions of the driver and passenger, while the Seat Bolster Memory Control Module controls the adjustment of the seat bolsters for added comfort and support.
Common Causes of U1520
- Faulty Driver/Passenger Seat Memory Control Module.
- Faulty Driver/Passenger Seat Bolster Memory Control Module.
- Damaged wiring or connectors in the LIN bus network.
- Software issues or programming errors.
- Electrical system malfunctions.
Symptoms of U1520
- Inability to store or recall seat positions.
- Inability to adjust seat bolsters.
- Error message on the dashboard related to seat memory.
- Malfunctioning seat controls.
How to Fix U1520
- Begin by conducting a thorough diagnostic scan using a professional OBD-II scanner to identify the specific cause of the communication loss between the modules.
- Inspect the wiring and connectors in the LIN bus network for any signs of damage or corrosion. Repair or replace any faulty components as needed.
- Test the Driver/Passenger Seat Memory Control Module and the Driver/Passenger Seat Bolster Memory Control Module to determine if they are functioning correctly. Replace any faulty modules.
- Reset the system and reprogram the modules to establish communication between them.
- Conduct a final test drive to ensure that the seat memory and bolster adjustment functions are working properly.
Cost to Fix U1520
The typical repair costs for addressing the U1520 code can vary depending on the specific cause of the issue and the labor rates in your area. On average, the parts for this repair could range from $100 to $500, while the labor costs may vary from $100 to $300, totaling around $200 to $800. It is important to note that these estimates are general and can fluctuate based on various factors, so it is recommended to consult with a professional mechanic for a more accurate cost assessment.
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Code U1520 Information for Specific Makes
- U1520 Buick — Driver/Passenger Seat Memory Control Module Lost Communication With Driver/Passenger Seat Bolster Memory Control Module On LIN Bus
- U1520 Cadillac — Driver/Passenger Seat Memory Control Module Lost Communication With Driver/Passenger Seat Bolster Memory Control Module On LIN Bus
- U1520 Chevrolet — Driver/Passenger Seat Memory Control Module Lost Communication With Driver/Passenger Seat Bolster Memory Control Module On LIN Bus
- U1520 GMC — Driver/Passenger Seat Memory Control Module Lost Communication With Driver/Passenger Seat Bolster Memory Control Module On LIN Bus
Frequently Asked Questions about U1520 Code
1. What are the common symptoms of OBDII code U1520?
- Common symptoms include malfunctioning seat memory settings, failure of seat adjustments, and warning lights on the dashboard.
2. What could cause the U1520 code to appear?
- The code may appear due to a communication loss between the driver/passenger seat memory control module and the seat bolster memory control module on the LIN bus.
3. How can I diagnose the U1520 code?
- Diagnosing the U1520 code involves using a diagnostic scanner to retrieve the code, checking the connections between modules, and testing the LIN bus communication.
4. Are there any repair tips for fixing the U1520 code?
- Repair tips include inspecting and repairing damaged wiring, ensuring proper module connections, and reprogramming or replacing faulty modules if necessary.
5. Can the U1520 code be fixed without professional help?
- Some basic troubleshooting steps, such as checking connections and fuses, can be done by DIY enthusiasts. However, complex repairs may require professional diagnosis and assistance.
6. Is it safe to drive with the U1520 code present?
- It is generally safe to drive with the U1520 code, but it is important to address the underlying issue promptly to prevent further problems with the seat controls.
7. How much does it typically cost to repair the U1520 code?
- The cost of repairing the U1520 code can vary depending on the extent of the issue, the need for replacement parts, and labor costs. It is recommended to get a few quotes from different mechanics.
8. Can resetting the vehicle's computer clear the U1520 code?
- Resetting the vehicle's computer may temporarily clear the code, but it will likely reappear if the underlying issue with the seat memory control modules is not resolved.
9. Are there any recalls related to the U1520 code?
- It is advisable to check with the vehicle manufacturer or a dealership to see if there are any recalls related to the U1520 code for your specific vehicle make and model.
10. What other functions could be affected by the U1520 code?
- In addition to the seat memory control modules, other related functions like heating/cooling features, lumbar support, and seat adjustments may also be affected by the U1520 code.
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