AutoCodes – Generic – U1517

U1517 Code - Body Control Module Lost Communication With Sunroof Sunshade Motor Module 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 Sunroof Sunshade Motor Module, Sunroof Sunshade Motor Module harness is open or shorted, Sunroof Sunshade Motor Module 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: U1517 indicates Body Control Module Lost Communication With Sunroof Sunshade Motor Module On LIN Bus.
Common causes: Common causes include Faulty Sunroof Sunshade Motor Module, Sunroof Sunshade Motor Module harness is open or shorted, Sunroof Sunshade Motor Module 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 4,851

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 02, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1517 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 Body Control Module (BCM) from the Sunroof Sunshade Motor Module has not been received.

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

What does this mean?

What are the Possible Causes of the DTC U1517?

Faulty Sunroof Sunshade Motor Module
Sunroof Sunshade Motor Module harness is open or shorted
Sunroof Sunshade Motor Module circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC U1517?

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 U1517 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.

Need more information about the U1517 code?

Need more information on how to fix the U1517 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1517 code diagnosed by a professional: Find a repair shop in your area

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.