AutoCodes – Cadillac – U1517 Cadillac

U1517 Cadillac 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 Cadillac 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 1,796

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

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 Cadillac?

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 Cadillac 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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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 Cadillac Code

1. What are the common symptoms of OBDII code U1517 in a Cadillac related to Body Control Module communication with the Sunroof Sunshade Motor Module?

- Common symptoms include malfunctioning sunroof or sunshade, failure to operate, loss of control functions, and possible error messages on the dashboard.

2. What can cause the Body Control Module to lose communication with the Sunroof Sunshade Motor Module on the LIN bus in a Cadillac?

- Possible causes include wiring issues, loose connections, a faulty sunroof sunshade motor module, a malfunctioning body control module, or a communication network problem.

3. How can I diagnose the U1517 trouble code in a Cadillac experiencing communication loss between the Body Control Module and Sunroof Sunshade Motor Module?

- Diagnose the code using a professional OBDII scanner to retrieve the specific details of the fault, inspect the wiring and connections, check for any visible damage, and perform a thorough system scan to pinpoint the issue.

4. Are there any DIY repair tips for resolving the U1517 code pertaining to Body Control Module communication with the Sunroof Sunshade Motor Module in a Cadillac?

- DIY repair tips include checking and repairing any damaged wiring, ensuring all connections are secure, resetting the body control module, and clearing the trouble code with a scanner after addressing the potential causes.

5. Can a simple reset of the system help clear the U1517 trouble code in a Cadillac caused by the loss of communication between the Body Control Module and Sunroof Sunshade Motor Module?

- In some cases, a system reset may temporarily clear the code, but it is essential to investigate and address the root cause to prevent the issue from recurring.

6. Is it safe to continue driving a Cadillac with the U1517 code due to the Body Control Module losing communication with the Sunroof Sunshade Motor Module?

- It is not recommended to drive the vehicle with unresolved communication issues between the modules, as it may lead to further malfunctions or safety concerns related to the sunroof or sunshade operation.

7. How crucial is it to address the U1517 code related to Body Control Module communication with the Sunroof Sunshade Motor Module in a Cadillac promptly?

- It is important to address the code promptly to ensure proper functionality of the sunroof and sunshade, prevent potential electrical issues, and maintain the overall performance of the vehicle.

8. Can a professional automotive technician help diagnose and repair the U1517 trouble code in a Cadillac caused by the Body Control Module losing communication with the Sunroof Sunshade Motor Module?

- Yes, a skilled technician can conduct a comprehensive diagnosis, accurately identify the root cause of the communication loss, and perform the necessary repairs to resolve the U1517 trouble code efficiently.

9. Are there any software updates or reprogramming procedures available to fix the U1517 code associated with Body Control Module communication issues in a Cadillac?

- It is advisable to check with a dealership or authorized service center for any available software updates or reprogramming procedures that may address the communication problem between the modules and clear the trouble code.

10. What is the typical cost range to repair the U1517 code related to the Body Control Module losing communication with the Sunroof Sunshade Motor Module in a Cadillac?

- The cost of repairs can vary depending on the underlying cause, but it may involve expenses for diagnostic services, parts replacement, and labor, with an estimated range of $200 to $500 or more.