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B1059 Acura Code - Relay Control Module Lost Communication With Door Multiplex Control Unit

Quick Answer

The B1059 diagnostic trouble code for Acura indicates that there is a communication issue between the Relay Control Module and the Door Multiplex Control Unit in the vehicle. Common causes include Faulty Relay Control Module, Faulty Door Multiplex Control Unit, Wiring issues or loose connections between the modules. 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
B1059 Acura indicates Relay Control Module Lost Communication With Door Multiplex Control Unit.
Common causes
Common causes include Faulty Relay Control Module, Faulty Door Multiplex Control Unit, Wiring issues or loose connections between the modules.
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 06, 2024
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Code B1059 Acura Description

The B1059 diagnostic trouble code for Acura indicates that there is a communication issue between the Relay Control Module and the Door Multiplex Control Unit in the vehicle. The Relay Control Module is responsible for controlling various relays within the vehicle, while the Door Multiplex Control Unit manages the functions of the power windows, door locks, and other related systems. When these two modules are unable to communicate properly, it can lead to malfunctions in the vehicle's electrical systems.

OBDII Code B1059 Acura - Relay Control Module Lost Communication With Door Multiplex Control Unit
B1059 Acura Code - Relay Control Module Lost Communication With Door Multiplex Control Unit

Common Causes of B1059 Acura

  1. Faulty Relay Control Module
  2. Faulty Door Multiplex Control Unit
  3. Wiring issues or loose connections between the modules
  4. Corrosion or damage to the electrical connectors
  5. Software glitches or communication errors within the vehicle's network

Symptoms of B1059 Acura

  1. Power windows not operating correctly
  2. Door locks not responding to remote or interior controls
  3. Interior lights not turning on or off as they should
  4. Security system malfunctions
  5. "Check Engine" light illuminated on the dashboard

How to Fix B1059 Acura

  1. Perform a diagnostic scan to confirm the B1059 code and pinpoint the exact location of the communication issue.
  2. Inspect the wiring harness and connectors for any signs of damage, corrosion, or loose connections.
  3. Test the Relay Control Module and Door Multiplex Control Unit to determine if they are functioning properly.
  4. Replace any faulty modules or components, and reprogram them as necessary to ensure proper communication.
  5. Clear the diagnostic trouble codes, reset the vehicle's systems, and test to verify that the issue has been resolved.

Cost to Fix B1059 Acura

The cost of repairing a B1059 code can vary depending on the extent of the issue and the specific components that need to be replaced. In general, the cost of parts for this repair could range from $100 to $500, with labor costs adding an additional $100 to $300. Overall, the total repair cost can be estimated to be between $200 and $800. It is important to keep in mind that labor rates and part prices can differ based on location and the type of repair shop, so it is recommended to obtain quotes from multiple sources before proceeding with the repair.

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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 B1059 Acura Code

1. What are the common symptoms of OBDII code B1059 in an Acura related to the Relay Control Module?

- Common symptoms include issues with power door locks, windows, and other electronic components controlled by the door multiplex control unit.

2. What could cause the Relay Control Module to lose communication with the Door Multiplex Control Unit in an Acura?

- Causes may include wiring issues, a faulty relay control module, a malfunctioning door multiplex control unit, or a communication network problem.

3. How can I diagnose the cause of OBDII code B1059 in my Acura?

- Proper diagnosis involves checking the wiring connections, inspecting the relay control module and door multiplex control unit, and using a diagnostic scanner to identify communication faults.

4. Is it safe to continue driving my Acura with the B1059 code present?

- It is generally not recommended to drive with this code as it can affect the functionality of critical vehicle systems controlled by the door multiplex control unit.

5. What are some repair tips for fixing the communication issue between the Relay Control Module and Door Multiplex Control Unit?

- Repair tips may include checking and repairing any damaged wiring, replacing faulty components, ensuring proper connections, and resetting the error code after repairs.

6. Can a DIY enthusiast fix the B1059 code issue in an Acura?

- While some basic troubleshooting steps can be performed by DIY enthusiasts, diagnosing and repairing communication issues between modules may require advanced tools and expertise best left to professionals.

7. How much does it typically cost to repair OBDII code B1059 in an Acura at a dealership or repair shop?

- Repair costs can vary depending on the specific cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Will resetting the OBDII code B1059 in my Acura make the problem go away permanently?

- Resetting the code may clear the warning temporarily, but if the underlying issue causing the communication fault is not addressed, the code is likely to reappear.

9. Are there any preventive measures to avoid OBDII code B1059 from occurring in my Acura?

- Regular maintenance checks, addressing electrical issues promptly, and ensuring proper installation of aftermarket electronic components can help prevent communication errors between modules.

10. Can a faulty battery or alternator cause OBDII code B1059 to trigger in an Acura?

- While a faulty battery or alternator can potentially lead to electrical issues in a vehicle, they are less likely to directly cause the specific communication fault indicated by OBDII code B1059.

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