U1549 Code - Body Control Module Lost Communication With Rear Wiper Motor 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 Rear Wiper Motor, Rear Wiper Motor harness is open or shorted, Rear Wiper Motor 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
- U1549 indicates Body Control Module Lost Communication With Rear Wiper Motor On LIN Bus.
- Common causes
- Common causes include Faulty Rear Wiper Motor, Rear Wiper Motor harness is open or shorted, Rear Wiper Motor 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.
Code U1549 Description
What are the Possible Causes of the DTC U1549?
- Faulty Rear Wiper Motor
- Rear Wiper Motor harness is open or shorted
- Rear Wiper Motor circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC U1549?
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 U1549 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
- U1549 Buick — Body Control Module Lost Communication With Rear Wiper Motor On LIN Bus
- U1549 Cadillac — Body Control Module Lost Communication With Rear Wiper Motor On LIN Bus
- U1549 Chevrolet — Body Control Module Lost Communication With Rear Wiper Motor On LIN Bus
- U1549 GMC — Body Control Module Lost Communication With Rear Wiper Motor On LIN Bus
Frequently Asked Questions about U1549 Code
1. What are the common symptoms of OBDII code U1549?
- Common symptoms include the rear wiper not functioning, intermittent operation of the rear wiper, and warning lights on the dashboard related to the rear wiper system.
2. What can cause the Body Control Module to lose communication with the rear wiper motor on the LIN bus?
- Potential causes can include a faulty rear wiper motor, damaged wiring or connectors in the LIN bus circuit, or a malfunctioning Body Control Module.
3. How can I diagnose the root cause of OBDII code U1549?
- A thorough inspection of the rear wiper motor, LIN bus wiring, and connections, as well as testing the Body Control Module, may be necessary using a diagnostic scan tool.
4. Can I continue driving my vehicle with OBDII code U1549?
- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to ensure the rear wiper system functions correctly.
5. What are some basic repair tips for resolving OBDII code U1549?
- Start by checking fuses related to the rear wiper system, inspecting wiring for damage, and ensuring all connections are secure before moving on to replacing components if needed.
6. Is it possible to reset OBDII code U1549 without repairing the issue?
- Resetting the code without addressing the underlying problem will likely cause it to reappear once the system detects the communication failure again.
7. Can extreme weather conditions affect the communication between the Body Control Module and the rear wiper motor?
- Yes, extreme weather conditions can potentially impact the electrical connections and components involved, leading to communication issues and triggering OBDII code U1549.
8. Are there any recalls or technical service bulletins related to OBDII code U1549?
- It’s recommended to check with the vehicle manufacturer or authorized service centers for any recalls or technical service bulletins specific to your vehicle make and model.
9. How much does it typically cost to repair OBDII code U1549?
- The cost of repair can vary depending on the root cause of the issue, but it may involve replacing the rear wiper motor, repairing wiring, or reprogramming the Body Control Module.
10. Can a DIY enthusiast with basic automotive knowledge fix OBDII code U1549?
- Depending on the skill level and tools available, some DIY enthusiasts may be able to diagnose and repair simple issues causing code U1549, such as checking and cleaning connectors or replacing fuses.
Discuss the causes and fixes for U1549 OBDII Code
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