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Engine-Codes – Generic – U1515

U1515 Code - Body Control Module Lost Communication With Left Windshield Wiper Motor/Windshield Wiper Motor Module On LIN Bus

Quick Answer

The U1515 code indicates that the Body Control Module (BCM) has lost communication with the Left Windshield Wiper Motor or Windshield Wiper Motor Module on the LIN Bus. Common causes include Faulty Left Windshield Wiper Motor, Faulty Windshield Wiper Motor Module, Wiring or connector issues between the BCM and wiper components. 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
U1515 indicates Body Control Module Lost Communication With Left Windshield Wiper Motor/Windshield Wiper Motor Module On LIN Bus.
Common causes
Common causes include Faulty Left Windshield Wiper Motor, Faulty Windshield Wiper Motor Module, Wiring or connector issues between the BCM and wiper components.
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 Aug 30, 2024
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Code U1515 Description

The U1515 code indicates that the Body Control Module (BCM) has lost communication with the Left Windshield Wiper Motor or Windshield Wiper Motor Module on the LIN Bus. The LIN Bus is a communication network used in modern vehicles to facilitate communication between various modules and components. When the BCM is unable to communicate with the wiper motor or its module, it can result in the windshield wipers not functioning properly or at all. This can pose a safety hazard, especially in inclement weather conditions, as the driver may not have full control over the wipers.

OBDII Code U1515 - Body Control Module Lost Communication With Left Windshield Wiper Motor/Windshield Wiper Motor Module On LIN Bus
U1515 Code - Body Control Module Lost Communication With Left Windshield Wiper Motor/Windshield Wiper Motor Module On LIN Bus

Common Causes of U1515

  1. Faulty Left Windshield Wiper Motor.
  2. Faulty Windshield Wiper Motor Module.
  3. Wiring or connector issues between the BCM and wiper components.
  4. BCM malfunction.
  5. Software glitches or communication errors within the LIN Bus network.

Symptoms of U1515

  1. Windshield wipers not working at all.
  2. Intermittent wiper operation.
  3. Wipers operating at incorrect speeds.
  4. Wipers not returning to their resting position.
  5. Warning light on the dashboard related to wiper system.

How to Fix U1515

  1. Begin by performing a thorough inspection of the wiring and connectors between the BCM, wiper motor, and wiper motor module to check for any damage or loose connections.
  2. Use a diagnostic scan tool to communicate with the BCM and wiper components to identify the specific cause of the communication loss.
  3. Test the Left Windshield Wiper Motor and Windshield Wiper Motor Module for proper function. Replace any faulty components as needed.
  4. If the issue lies with the BCM, reprogram or replace the module as necessary.
  5. After completing the repairs, clear the diagnostic trouble codes and test the wiper system to ensure proper operation.

Cost to Fix U1515

The cost of repairing a U1515 code can vary depending on the specific cause of the issue and the labor rates in your area. In general, replacing a faulty wiper motor or module can cost between $150 and $300, while a new BCM can range from $200 to $600. Labor costs can add an additional $100 to $300, depending on the shop's hourly rates. Therefore, the total repair cost can range from $250 to $900 or more. It's recommended to obtain quotes from local auto repair shops to get a more accurate estimate based on your vehicle's make and model.

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Code U1515 Information for Specific Makes

  • U1515 Buick — Body Control Module Lost Communication With Left Windshield Wiper Motor/Windshield Wiper Motor Module On LIN Bus
  • U1515 Cadillac — Body Control Module Lost Communication With Left Windshield Wiper Motor/Windshield Wiper Motor Module On LIN Bus
  • U1515 Chevrolet — Body Control Module Lost Communication With Left Windshield Wiper Motor/Windshield Wiper Motor Module On LIN Bus
  • U1515 GMC — Body Control Module Lost Communication With Left Windshield Wiper Motor/Windshield Wiper 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 U1515 Code

1. What are the common symptoms of OBDII code U1515?

- Common symptoms include the left windshield wiper not functioning properly or at all, irregular wiper operation, and a warning light on the dashboard.

2. What causes the OBDII code U1515 to be triggered?

- This code is usually triggered when the body control module loses communication with the left windshield wiper motor or the windshield wiper motor module on the LIN bus.

3. How can I diagnose the issue related to OBDII code U1515?

- Diagnosing the issue involves checking the wiring connections between the body control module, left windshield wiper motor, and windshield wiper motor module. Using a diagnostic scanner to read the code and check for any other related fault codes is also recommended.

4. What are some possible repair tips for resolving OBDII code U1515?

- Repair tips may involve inspecting and repairing any damaged wiring or loose connections between the involved components. Resetting the fault codes after the repair is also important to see if the issue persists.

5. Can a DIY enthusiast fix OBDII code U1515 on their own?

- While basic troubleshooting like checking connections can be done by a DIY enthusiast, more complex diagnostics and repairs involving the LIN bus system may require professional assistance.

6. Is it safe to continue driving with OBDII code U1515 present?

- It is generally not recommended to drive with this code present, as it may affect the proper functioning of the windshield wiper system, compromising visibility in adverse weather conditions.

7. How can I prevent OBDII code U1515 from recurring?

- Regularly inspecting the wiring connections, keeping the windshield wiper system well-maintained, and addressing any issues promptly can help prevent this code from recurring.

8. Are there any recalls or service bulletins related to OBDII code U1515?

- It's advisable to check with the vehicle manufacturer or authorized dealerships for any recalls or service bulletins related to this specific OBDII code to stay informed about potential fixes or updates.

9. Does OBDII code U1515 affect other vehicle systems?

- While this code specifically relates to the communication issue between the body control module and the left windshield wiper system, it may indirectly impact other vehicle systems that rely on accurate sensor data for operation.

10. How much can I expect to pay to repair OBDII code U1515 at a repair shop?

- Repair costs can vary depending on the extent of the issue and labor rates in your area. It's advisable to get quotes from reputable repair shops to determine the approximate cost of resolving this OBDII code.

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