AutoCodes – Chevrolet – U1550 Chevrolet

U1550 Chevrolet Code - Body Control Module Lost Communication With Driver Seat Heating and Cooling Switch 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 Driver Seat Heating and Cooling Switch, Driver Seat Heating and Cooling Switch harness is open or shorted, Driver Seat Heating and Cooling Switch 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: U1550 Chevrolet indicates Body Control Module Lost Communication With Driver Seat Heating and Cooling Switch On LIN Bus.
Common causes: Common causes include Faulty Driver Seat Heating and Cooling Switch, Driver Seat Heating and Cooling Switch harness is open or shorted, Driver Seat Heating and Cooling Switch 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 3,236

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 U1550 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 Driver Seat Heating and Cooling Switch has not been received.

OBDII Code U1550 Chevrolet - Body Control Module Lost Communication With Driver Seat Heating and Cooling Switch On LIN Bus - AutoCodes.com — U1550 Chevrolet Code - Body Control Module Lost Communication With Driver Seat Heating and Cooling Switch On LIN Bus

What does this mean?

What are the Possible Causes of the DTC U1550 Chevrolet?

Faulty Driver Seat Heating and Cooling Switch
Driver Seat Heating and Cooling Switch harness is open or shorted
Driver Seat Heating and Cooling Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC U1550 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 U1550 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 U1550 Chevrolet Code

1. What are the common symptoms of OBDII code U1550 in a Chevrolet related to the Body Control Module losing communication with the driver seat heating and cooling switch?

- Common symptoms include inoperative seat heating or cooling functions, illuminated warning lights on the dashboard, and possible issues with other electronic components in the vehicle.

2. What are the possible causes of OBDII code U1550 in a Chevrolet indicating communication loss with the driver seat heating and cooling switch?

- The possible causes include a faulty driver seat heating and cooling switch, damaged wiring or connectors in the LIN bus communication system, or a malfunction in the Body Control Module.

3. How can I diagnose the source of the communication loss between the Body Control Module and the driver seat heating and cooling switch in a Chevrolet?

- Diagnostic steps involve checking the wiring and connectors for damage, testing the functionality of the seat heating and cooling switch, and using a scan tool to communicate with the Body Control Module for error codes.

4. Is it safe to continue driving with OBDII code U1550 in a Chevrolet related to the Body Control Module losing communication with the driver seat heating and cooling switch?

- While the vehicle may still be drivable, it is recommended to address the issue promptly to ensure the proper functioning of essential electronic systems and avoid potential further damage.

5. Are there any simple repair tips for fixing OBDII code U1550 in a Chevrolet associated with the communication loss with the driver seat heating and cooling switch?

- Basic repair tips include checking and cleaning the connectors, ensuring proper wiring connections, and resetting the Body Control Module to see if the communication issue resolves.

6. Can OBDII code U1550 in a Chevrolet be cleared/reset to see if the communication with the driver seat heating and cooling switch is restored?

- Yes, the code can be cleared using an OBDII scanner, but it is essential to address the root cause of the communication loss to prevent the code from reappearing.

7. What are the potential complications of ignoring OBDII code U1550 in a Chevrolet related to the Body Control Module's communication loss with the driver seat heating and cooling switch?

- Ignoring the code may lead to continued malfunction of the seat heating and cooling system, potential issues with other vehicle electronics, and possible safety concerns if critical systems are affected.

8. How much does it typically cost to repair OBDII code U1550 in a Chevrolet caused by the Body Control Module losing communication with the driver seat heating and cooling switch?

- The cost of repair can vary depending on the exact cause of the communication loss, but it may involve expenses for diagnostic labor, parts replacement, and potential reprogramming of the Body Control Module.

9. Can a DIY enthusiast with basic automotive knowledge attempt to fix OBDII code U1550 in a Chevrolet related to the communication loss with the driver seat heating and cooling switch?

- While some basic troubleshooting steps can be taken, addressing the root cause of the communication issue may require specialized tools and expertise, making professional assistance advisable in many cases.

10. How long does it typically take to repair OBDII code U1550 in a Chevrolet due to the Body Control Module's communication loss with the driver seat heating and cooling switch?

- The repair time can vary based on the complexity of the issue, availability of parts, and the technician's workload. In some cases, the repair may be completed within a few hours, while more involved repairs could take longer.