AutoCodes – Generic – U1528

U1528 Code - Driver/Passenger Seat Memory Control Module Lost Communication With Driver/Passenger Seat Adjuster Switch On LIN Bus

Quick Answer

The Local Interconnect Network (LIN) Bus consists of a single wire with a transmission rate of 10.417 Kbit/s. Common causes include Faulty Driver/Passenger Seat Adjuster Switch, Driver/Passenger Seat Adjuster Switch harness is open or shorted, Driver/Passenger Seat Adjuster Switch 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: U1528 indicates Driver/Passenger Seat Memory Control Module Lost Communication With Driver/Passenger Seat Adjuster Switch On LIN Bus.
Common causes: Common causes include Faulty Driver/Passenger Seat Adjuster Switch, Driver/Passenger Seat Adjuster Switch harness is open or shorted, Driver/Passenger Seat Adjuster Switch 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.

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Code Popularity 860

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1528 Description

The Local Interconnect Network (LIN) Bus consists of a single wire with a transmission rate of 10.417 Kbit/s. The serial data is transmitted over a LIN circuit between a master control module and other LIN devices within a particular subsystem. If serial data communication is lost between any of the LIN devices on the LIN bus network, the master control module will set a no communication code against the non-communicating LIN device. The Diagnostic Trouble Code (DTC) will set when a supervised periodic message to the Driver/Passenger Seat Memory Control Module from the Driver/Passenger Seat Adjuster Switch has not been received.

OBDII Code U1528 - Driver/Passenger Seat Memory Control Module Lost Communication With Driver/Passenger Seat Adjuster Switch On LIN Bus - AutoCodes.com — U1528 Code - Driver/Passenger Seat Memory Control Module Lost Communication With Driver/Passenger Seat Adjuster Switch On LIN Bus

What does this mean?

What are the Possible Causes of the DTC U1528?

Faulty Driver/Passenger Seat Adjuster Switch
Driver/Passenger Seat Adjuster Switch harness is open or shorted
Driver/Passenger Seat Adjuster Switch circuit poor electrical connection
Faulty Driver/Passenger Seat Memory Control Module

How to Fix the DTC U1528?

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U1528 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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Information for Specific Makes

U1528 Buick — Driver/Passenger Seat Memory Control Module Lost Communication With Driver/Passenger Seat Adjuster Switch On LIN Bus
U1528 Cadillac — Driver/Passenger Seat Memory Control Module Lost Communication With Driver/Passenger Seat Adjuster Switch On LIN Bus
U1528 Chevrolet — Driver/Passenger Seat Memory Control Module Lost Communication With Driver/Passenger Seat Adjuster Switch On LIN Bus
U1528 GMC — Driver/Passenger Seat Memory Control Module Lost Communication With Driver/Passenger Seat Adjuster Switch On LIN Bus

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about U1528 Code

1. What does OBDII code U1528 mean?

Code U1528 indicates that the Driver/Passenger Seat Memory Control Module has lost communication with the Driver/Passenger Seat Adjuster Switch over the LIN (Local Interconnect Network) Bus.

2. What are the common symptoms of code U1528?

Symptoms may include the seat memory function not working, inability to adjust the seat, unresponsive seat controls, or the appearance of a warning light on the dashboard.

3. What causes OBDII code U1528 to appear?

Common causes include a faulty seat memory control module, a defective seat adjuster switch, damaged LIN bus wiring, poor electrical connections, or software issues.

4. Can I still drive my car with code U1528?

Yes, code U1528 does not typically affect drivability, but it may prevent certain seat adjustments or memory functions from operating properly.

5. How do I diagnose U1528?

Start by checking the wiring and connectors between the seat memory control module and the seat adjuster switch. Use a scan tool to verify communication on the LIN bus and test the related components for faults.

6. Can a blown fuse cause code U1528?

Yes, a blown fuse in the circuit supplying power to the seat memory control module or seat adjuster switch can lead to a loss of communication and trigger this code.

7. How is code U1528 fixed?

Repairs may involve replacing a faulty seat memory control module or seat adjuster switch, repairing damaged wiring, cleaning corroded connectors, or reprogramming the module if needed.

8. Is replacing the seat memory control module always necessary for U1528?

No, replacing the module is not always necessary. The issue could be related to wiring, connectors, or a minor software glitch that can be resolved without replacement.

9. How much does it cost to repair code U1528?

Repair costs vary depending on the issue, but fixing wiring or connectors is usually cheaper than replacing the seat memory control module or seat adjuster switch, which can cost several hundred dollars.

10. Can a software update resolve U1528?

Yes, if the issue is related to a software glitch in the seat memory control module, a software update from the vehicle manufacturer may resolve the problem.