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Engine-Codes – Generic – U1517

U1517 Code - Body Control Module Lost Communication With Sunroof Sunshade Motor Module On LIN Bus

Quick Answer

The U1517 diagnostic trouble code (DTC) indicates that the Body Control Module (BCM) has lost communication with the Sunroof Sunshade Motor Module on the Local Interconnect Network (LIN) bus. Common causes include Faulty wiring or connectors in the LIN bus communication, Malfunctioning BCM or sunroof sunshade motor module, Corrosion or damage to the connectors. 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
U1517 indicates Body Control Module Lost Communication With Sunroof Sunshade Motor Module On LIN Bus.
Common causes
Common causes include Faulty wiring or connectors in the LIN bus communication, Malfunctioning BCM or sunroof sunshade motor module, Corrosion or damage to the connectors.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 07, 2024
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Code U1517 Description

The U1517 diagnostic trouble code (DTC) indicates that the Body Control Module (BCM) has lost communication with the Sunroof Sunshade Motor Module on the Local Interconnect Network (LIN) bus. The LIN bus is a communication network used by various control modules in the vehicle to exchange data and signals. In this case, the BCM, which is responsible for controlling various body-related functions such as lighting, windows, and the sunroof, is unable to communicate with the sunroof sunshade motor module.

OBDII Code U1517 - Body Control Module Lost Communication With Sunroof Sunshade Motor Module On LIN Bus
U1517 Code - Body Control Module Lost Communication With Sunroof Sunshade Motor Module On LIN Bus

Common Causes of U1517

  1. Faulty wiring or connectors in the LIN bus communication.
  2. Malfunctioning BCM or sunroof sunshade motor module.
  3. Corrosion or damage to the connectors.
  4. Electrical interference or short circuits in the system.

Symptoms of U1517

  1. Sunroof fails to open or close.
  2. Sunshade does not operate properly.
  3. Warning light related to the sunroof system illuminates on the dashboard.
  4. Inability to control the sunroof or sunshade using the interior switches.

How to Fix U1517

  1. Diagnose the issue using a diagnostic scanner to confirm the U1517 code and pinpoint the communication problem between the BCM and sunroof sunshade motor module.
  2. Inspect the wiring, connectors, and components involved in the LIN bus communication for any signs of damage or corrosion.
  3. Test the BCM and sunroof sunshade motor module for proper functionality and communication.
  4. Repair or replace any damaged wiring, connectors, or components as necessary.
  5. Clear the DTC and perform a test to ensure that the communication between the BCM and sunroof sunshade motor module has been restored.

Cost to Fix U1517

The typical repair costs for addressing a U1517 code can vary depending on the extent of the issue and the specific components that need to be repaired or replaced. On average, the cost of parts and labor for this repair could range from $200 to $500. However, it's important to note that the actual cost may be higher or lower based on factors such as the location of the repair shop, the make and model of the vehicle, and the rates charged by the technician. It's recommended to contact local auto repair shops for a more accurate estimate based on your specific circumstances.

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Code U1517 Information for Specific Makes

  • U1517 Buick — Body Control Module Lost Communication With Sunroof Sunshade Motor Module On LIN Bus
  • U1517 Cadillac — Body Control Module Lost Communication With Sunroof Sunshade Motor Module On LIN Bus
  • U1517 Chevrolet — Body Control Module Lost Communication With Sunroof Sunshade Motor Module On LIN Bus
  • U1517 GMC — Body Control Module Lost Communication With Sunroof Sunshade Motor Module 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 U1517 Code

What does the OBDII code U1517 indicate?

The OBDII code U1517 indicates that there is a loss of communication between the Body Control Module (BCM) and the sunroof sunshade motor module over the Local Interconnect Network (LIN) bus.

What are common symptoms associated with code U1517?

Common symptoms may include a non-functioning sunroof sunshade, erratic sunroof operation, or warning lights on the dashboard related to the roof or electrical system.

What could cause the U1517 code to trigger?

Causes may include a faulty sunshade motor module, damaged wiring or connectors, a malfunctioning Body Control Module, or issues with the LIN bus communication.

How can I diagnose the U1517 code?

To diagnose the U1517 code, use an OBDII scanner to confirm the code, inspect the wiring and connectors for damage, and check the functionality of the sunshade motor module.

What repairs can be done to fix the U1517 code?

Repairs may involve replacing the sunshade motor module, repairing or replacing damaged wiring, or reprogramming or replacing the Body Control Module.

Is it safe to drive with the U1517 code?

While it may be safe to drive, the sunroof sunshade may not operate correctly, which could be a concern in certain weather conditions. It's best to address the issue promptly.

Can a dead battery cause the U1517 code?

Yes, a dead or weak battery can cause communication issues between modules and may lead to the U1517 code being set. Ensure the battery is fully charged and in good condition.

Will clearing the U1517 code solve the problem?

Clearing the code may temporarily turn off the warning light, but if the underlying issue is not resolved, the code is likely to return.

How can I prevent the U1517 code from occurring in the future?

Regularly inspect and maintain wiring and connectors, ensure all modules are functioning correctly, and promptly address any electrical issues to help prevent the U1517 code.

Discuss the causes and fixes for U1517 OBDII Code

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