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B1058 Acura Code - Relay Control Module Lost Communication With Door Multiplex Control Unit

Quick Answer

The B1058 diagnostic trouble code for Acura indicates that there is a communication problem between the Relay Control Module and the Door Multiplex Control Unit. Common causes include Wiring issues, such as a short circuit or open circuit, Faulty Relay Control Module, Faulty Door Multiplex Control Unit. 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
B1058 Acura indicates Relay Control Module Lost Communication With Door Multiplex Control Unit.
Common causes
Common causes include Wiring issues, such as a short circuit or open circuit, Faulty Relay Control Module, Faulty Door Multiplex Control Unit.
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 Sep 12, 2024
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Code B1058 Acura Description

The B1058 diagnostic trouble code for Acura indicates that there is a communication problem between the Relay Control Module and the Door Multiplex Control Unit. In modern vehicles, various control modules communicate with each other through a network called the Controller Area Network (CAN). The Relay Control Module is responsible for controlling various relays that manage functions such as power distribution, lighting, and other electrical components. The Door Multiplex Control Unit, on the other hand, is in charge of managing the functions related to the doors, such as power windows, locks, and mirrors.

OBDII Code B1058 Acura - Relay Control Module Lost Communication With Door Multiplex Control Unit
B1058 Acura Code - Relay Control Module Lost Communication With Door Multiplex Control Unit

Common Causes of B1058 Acura

  1. Wiring issues, such as a short circuit or open circuit.
  2. Faulty Relay Control Module.
  3. Faulty Door Multiplex Control Unit.
  4. CAN bus communication error.
  5. Corrosion or loose connections in the electrical system.

Symptoms of B1058 Acura

  1. Doors failing to lock or unlock properly.
  2. Power windows not functioning correctly.
  3. Interior lights flickering or not turning on.
  4. Dashboard warning light indicating a communication error.
  5. In some cases, the vehicle may go into a limp mode to prevent further damage.

How to Fix B1058 Acura

  1. Perform a comprehensive diagnostic scan using a professional OBD-II scanner to identify the exact cause of the communication error.
  2. Inspect the wiring harness between the Relay Control Module and the Door Multiplex Control Unit for any signs of damage or corrosion.
  3. Test the Relay Control Module and the Door Multiplex Control Unit to determine if either component is faulty.
  4. Repair or replace any damaged wiring or components as necessary.
  5. Clear the diagnostic trouble codes and perform a test drive to ensure the issue has been resolved.

Cost to Fix B1058 Acura

The cost of repairing the B1058 code can vary depending on the specific cause of the communication error. On average, you can expect to pay between $200 and $500 for parts and labor. However, this cost can increase if more extensive repairs are required, such as replacing a control module. It is advisable to consult with a trusted auto repair shop to get an accurate estimate based on your vehicle's make and model. Keep in mind that labor rates can vary, so it's essential to inquire about this beforehand.

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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 B1058 Acura Code

1. What are the common symptoms of OBDII code B1058 in an Acura vehicle?

- Common symptoms include power door locks malfunctioning, interior lights not working properly, and issues with the door control modules.

2. What can cause the OBDII code B1058 in an Acura vehicle?

- The code is typically triggered when there is a communication breakdown between the relay control module and the door multiplex control unit, which can be caused by wiring issues, a faulty control unit, or a damaged relay module.

3. How can I diagnose the OBDII code B1058 in my Acura?

- Diagnosing the issue usually involves inspecting the wiring connections between the relay control module and the door multiplex control unit, checking for any visible damage, and using a diagnostic scanner to read the specific error codes.

4. Is it safe to continue driving with the OBDII code B1058 present in my Acura?

- While the vehicle may still be operable with this code, it is recommended to address the issue promptly to prevent further electrical problems and potential safety hazards.

5. Can I repair the OBDII code B1058 in my Acura myself?

- If you have experience with automotive electrical systems and access to the necessary tools, you may be able to repair the issue yourself by identifying and resolving the communication problem between the relay control module and the door multiplex control unit.

6. What are some repair tips for fixing the OBDII code B1058 in an Acura?

- Repair tips include checking and repairing any damaged wiring, ensuring proper connections between components, and potentially replacing the relay control module or the door multiplex control unit if they are found to be faulty.

7. Does the OBDII code B1058 affect the overall performance of my Acura?

- While the code itself may not directly impact performance, it can lead to operational issues with various electrical components controlled by the relay and multiplex units.

8. How much does it typically cost to repair the OBDII code B1058 in an Acura at a professional service center?

- Repair costs can vary depending on the specific cause of the issue, but you can expect to pay for diagnostic fees, parts replacement, and labor, with the total cost potentially ranging from a few hundred to over a thousand dollars.

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