[SOLVED] U1544 Code: Left Rear Window Motor Communication Lost – Fix Now!

The automobile fault code U1544 indicates a problem with the left rear window motor or its circuitry. The most common symptom is the illumination of the engine light or service engine soon warning light. The cause could be a faulty left rear window motor, an open or shorted harness, a poor electrical connection in the motor circuit, or a faulty body control module.

The importance of repairing this issue lies in the fact that it can affect the overall performance of the vehicle.

The repair difficulty is moderate, and the estimated repair time is around 1.0 hour.

To fix the problem, one should visually inspect the wiring harness and connectors, check for damaged components, and look for broken, bent, pushed out, or corroded connector pins.

Repair Importance Level10.0 (Out of 10)
Estimated Repair TimeApproximately 1.0 hour
Repair Difficulty Level10.0 (Out of 10)

If you notice the Engine Light ON (or Service Engine Soon Warning Light), it could be due to the u1544 fault code. Here are the symptoms to look out for:

  • The U1544 fault code in an automobile can cause several symptoms, including the engine light turning on or the service engine soon warning light appearing.
  • Other symptoms may include issues with the transmission, such as difficulty shifting gears or the transmission slipping.
  • The vehicle may also experience a decrease in power or acceleration, and the engine may stall or hesitate during operation.
  • Additionally, the vehicle’s fuel efficiency may decrease, and there may be issues with the vehicle’s speedometer or other gauges.

The automobile fault code u1544 can be caused by a faulty left rear window motor, open or shorted harness, poor electrical connection, or a faulty body control module (BCM).

  • The automobile fault code U1544 can be caused by a faulty left rear window motor.
  • It can also be caused by an open or shorted left rear window motor harness.
  • Another possible cause is a poor electrical connection in the left rear window motor circuit.
  • Lastly, a faulty body control module (BCM) can also trigger this fault code.

Below are some possible fixes for the automobile fault code u1544, including inspecting wiring harness and connectors for damage or corrosion.

  • To fix the automobile fault code u1544, first, check the possible causes listed above.
  • Then, visually inspect the related wiring harness and connectors.
  • Look for any damaged components and check for broken, bent, pushed out, or corroded connector’s pins.
  • This fix will take an estimated repair time of 1.0 hour.

The automobile fault code U1544 can be diagnosed and fixed within an estimated repair time of 1.0 hour. The cost of repair is influenced by the hourly rate charged by the auto repair shop, which typically ranges between $75 and $150 per hour. Therefore, the total cost of diagnosis and fixing the U1544 fault code will depend on the hourly rate charged by the auto repair shop and the estimated repair time required to fix the issue.

The U1544 code is related to the Local Interconnect Network (LIN) Bus. It occurs when the Body Control Module (BCM) loses communication with the Left Rear Window Motor on the LIN Bus. The LIN Bus is a single wire with a transmission rate of 10.417 Kbits that transmits serial data 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 U1544 code is set when a supervised periodic message to the BCM from the Left Rear Window Motor has not been received.

What are the possible causes of the u1544 automobile fault code?

If you’re experiencing the u1544 fault code, your engine light may be on. This could be due to a faulty left rear window motor, an open or shorted harness, a poor electrical connection in the left rear window motor circuit, or a faulty body control module. To fix the issue, check the possible causes listed above and visually inspect the related wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.

How can I visually inspect the related wiring harness and connectors to fix the u1544 fault code?

If you’re experiencing the u1544 fault code, which is indicated by the Engine Light ON or Service Engine Soon Warning Light, you can fix it by visually inspecting the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins. Also, check the possible causes listed above, which include a faulty left rear window motor, an open or shorted left rear window motor harness, a poor electrical connection in the left rear window motor circuit, or a faulty Body Control Module (BCM).

Is it necessary to check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins to fix the u1544 fault code?

To fix the u1544 fault code, it is necessary to check for damaged components and inspect the related wiring harness and connectors. This fault code can be caused by a faulty left rear window motor, an open or shorted motor harness, a poor electrical connection in the motor circuit, or a faulty body control module. To address the issue, it is important to visually inspect the wiring and connectors, and look for any broken, bent, pushed out, or corroded pins.

u1544 error fault code explained

If your engine light is on, it could be due to a faulty left rear window motor, an open or shorted harness, poor electrical connection, or a faulty body control module.

Check for damaged components and inspect the wiring harness and connectors for any issues.

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