AutoCodes – Mercury – B1155 Mercury

B1155 Mercury Code - Subwoofer 1 Short to Battery

Quick Answer

The subwoofer amplifier receives voltage and ground. Common causes include Faulty Audio Subwoofer, Audio Subwoofer harness is open or shorted, Audio Subwoofer circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B1155 Mercury indicates Subwoofer 1 Short to Battery.
Common causes: Common causes include Faulty Audio Subwoofer, Audio Subwoofer harness is open or shorted, Audio Subwoofer circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 608

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 19, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1155 Mercury Description

The subwoofer amplifier receives voltage and ground. To enable the subwoofer amplifier, the Audio Control Module (ACM) sends voltage. The circuit acts as both an output (to enable the amplifier) and an input (to detect an amplifier overload condition). A variable resistor in the subwoofer amplifier modifies the voltage signal from the ACM. In the event of an overload, the ACM clips the audio output signal to the amplifier (heard as distortion), in order to prevent damage to the amplifier and speaker. An open in circuit will cause the subwoofer to produce no sound, because the enable signal will not reach the subwoofer amplifier. A short to ground or short to voltage can cause severe distortion to be heard in the subwoofer. The Diagnostic Trouble Code (DTC) sets when a short to voltage is detected on the circuit.

OBDII Code B1155 Mercury - Subwoofer 1 Short to Battery - AutoCodes.com — B1155 Mercury Code - Subwoofer 1 Short to Battery

What does this mean?

What are the Possible Causes of the DTC B1155 Mercury?

Faulty Audio Subwoofer
Audio Subwoofer harness is open or shorted
Audio Subwoofer circuit poor electrical connection
Faulty Audio Control Module (ACM)

How to Fix the DTC B1155 Mercury?

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 B1155 Mercury 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 B1155 Mercury Code

1. What are the common symptoms of OBDII code B1155 Mercury (Subwoofer 1 Short to Battery)?

The common symptoms include a malfunctioning subwoofer, distorted sound quality, or complete loss of sound from the subwoofer.

2. What are the possible causes of OBDII code B1155 Mercury (Subwoofer 1 Short to Battery)?

Possible causes include a short circuit in the wiring leading to the subwoofer, a faulty subwoofer unit, or a problem with the audio system's amplifier.

3. How can I diagnose OBDII code B1155 Mercury (Subwoofer 1 Short to Battery)?

Diagnosing this code involves checking the wiring for any visible damage, testing the subwoofer unit for continuity, and inspecting the amplifier for proper functioning.

4. What are the repair options for OBDII code B1155 Mercury (Subwoofer 1 Short to Battery)?

Repair options may include repairing or replacing damaged wiring, replacing the subwoofer unit if faulty, or repairing the audio system's amplifier.

5. Can I reset OBDII code B1155 Mercury (Subwoofer 1 Short to Battery without fixing the underlying issue?

Resetting the code without fixing the underlying issue will likely result in the code reappearing once the problem is detected again by the vehicle's diagnostic system.

6. Is it safe to continue driving with OBDII code B1155 Mercury (Subwoofer 1 Short to Battery)?

While it may be safe to drive with this code, it is recommended to address the issue promptly to prevent any further damage to the audio system or related components.

7. How much does it typically cost to repair OBDII code B1155 Mercury (Subwoofer 1 Short to Battery)?

The cost of repair can vary depending on the specific cause of the issue, but it may range from a few hundred to a few thousand dollars, including parts and labor.

8. Can I fix OBDII code B1155 Mercury (Subwoofer 1 Short to Battery) myself?

If you have experience with automotive electrical systems and access to the necessary tools, you may be able to diagnose and repair this code yourself. Otherwise, it is recommended to seek professional help.

9. Are there any preventive measures to avoid OBDII code B1155 Mercury (Subwoofer 1 Short to Battery)?

Regularly inspecting the audio system wiring, avoiding water damage to the subwoofer unit, and ensuring proper installation of audio components can help prevent this code from occurring.

10. How long does it typically take to repair OBDII code B1155 Mercury (Subwoofer 1 Short to Battery)?

The repair time can vary depending on the complexity of the issue and the availability of parts, but it may take a few hours to a day to diagnose and fix the problem.