AutoCodes – Chevrolet – U1544 Chevrolet

U1544 Chevrolet Code - Body Control Module Lost Communication With Left Rear Window 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 Left Rear Window Motor, Left Rear Window Motor harness is open or shorted, Left Rear Window 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: U1544 Chevrolet indicates Body Control Module Lost Communication With Left Rear Window Motor On LIN Bus.
Common causes: Common causes include Faulty Left Rear Window Motor, Left Rear Window Motor harness is open or shorted, Left Rear Window 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.

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Code Popularity 1,971

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jun 04, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1544 Chevrolet 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 Left Rear Window Motor has not been received.

OBDII Code U1544 Chevrolet - Body Control Module Lost Communication With Left Rear Window Motor On LIN Bus - AutoCodes.com — U1544 Chevrolet Code - Body Control Module Lost Communication With Left Rear Window Motor On LIN Bus

What does this mean?

What are the Possible Causes of the DTC U1544 Chevrolet?

Faulty Left Rear Window Motor
Left Rear Window Motor harness is open or shorted
Left Rear Window Motor circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC U1544 Chevrolet?

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 U1544 Chevrolet 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 U1544 Chevrolet Code

1. What are common symptoms of OBDII code U1544 in a Chevrolet related to the Body Control Module losing communication with the left rear window motor on the LIN bus?

The common symptoms include the left rear window being inoperative, the window operating erratically, or the window getting stuck in a certain position.

2. What are some possible causes of OBDII code U1544 in a Chevrolet indicating a communication issue with the left rear window motor?

Possible causes include a faulty left rear window motor, a damaged LIN bus communication circuit, a malfunctioning Body Control Module (BCM), or loose electrical connections.

3. How can I diagnose the root cause of OBDII code U1544 in my Chevrolet if the Body Control Module has lost communication with the left rear window motor?

To diagnose the issue, you can perform a visual inspection of the wiring and connections, test the left rear window motor for functionality, and use a diagnostic scanner to check for communication errors between the BCM and the window motor.

4. What are some repair tips for resolving OBDII code U1544 in a Chevrolet related to the Body Control Module losing communication with the left rear window motor?

Repair tips may include repairing or replacing any damaged wiring or connectors, testing and replacing the left rear window motor if faulty, checking and reprogramming the BCM if necessary, and ensuring all connections are secure.

5. Can OBDII code U1544 in a Chevrolet be cleared/reset without addressing the underlying issue of the Body Control Module losing communication with the left rear window motor?

Clearing the code without fixing the communication issue may temporarily turn off the check engine light, but the problem will likely persist, and the code may reappear once the system detects the ongoing communication problem.

6. Is it safe to continue driving my Chevrolet with OBDII code U1544 triggered, indicating a communication problem between the Body Control Module and the left rear window motor?

It is generally not recommended to continue driving the vehicle with this issue unresolved, as it can lead to inconvenience, potential safety hazards, and further damage to the window motor or electrical system.

7. Are there any recalls or technical service bulletins (TSBs) related to OBDII code U1544 in Chevrolet vehicles concerning the Body Control Module's communication with the left rear window motor?

It is advisable to check with Chevrolet dealerships or online resources for any recalls or TSBs specifically addressing the communication problem between the BCM and the left rear window motor to see if there are any related issues.

8. How much can I expect to pay for repairing OBDII code U1544 in a Chevrolet due to the Body Control Module losing communication with the left rear window motor?

Repair costs can vary depending on the root cause of the issue and labor rates, but expenses may include parts replacement, diagnostic fees, and labor costs, with the total potentially ranging from a few hundred to over a thousand dollars.

9. Can a DIY enthusiast with automotive knowledge attempt to fix OBDII code U1544 in a Chevrolet caused by the Body Control Module's lost communication with the left rear window motor?

While some basic troubleshooting and repairs may be possible for those with automotive experience, diagnosing and repairing communication issues involving the BCM and window motor may require specialized tools and expertise, so it is recommended to seek professional help if unsure.

10. How can regular maintenance help prevent OBDII code U1544 in a Chevrolet related to the Body Control Module's communication with the left rear window motor?

Regularly inspecting the window motor, wiring, and connections for signs of wear or damage, addressing any issues promptly, and ensuring proper maintenance of the electrical system can help prevent communication problems between the BCM and the left rear window motor.