AutoCodes – Mercury – B1087 Mercury

B1087 Mercury Code - Door Module LIN Bus 'A'

Quick Answer

The Driver Door Module (DDM) and Passenger Door Module (PDM) communicate with the corresponding Driver Rear Door Module (DRDM) and Passenger Rear Door Module (PRDM) over a dedicated Local Interconnect Network (LIN). Common causes include Faulty Window Control Switch, Window Control Switch harness is open or shorted, Window Control 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: B1087 Mercury indicates Door Module LIN Bus 'A'.
Common causes: Common causes include Faulty Window Control Switch, Window Control Switch harness is open or shorted, Window Control 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 1,027

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 18, 2024

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B1087 Mercury Description

The Driver Door Module (DDM) and Passenger Door Module (PDM) communicate with the corresponding Driver Rear Door Module (DRDM) and Passenger Rear Door Module (PRDM) over a dedicated Local Interconnect Network (LIN). The window control on the driver door also provides information to the DDM over the same LIN. In the event of a failure on a LIN, the power windows, power locks, and switch illumination are inoperative in the corresponding rear door. If there is a LIN failure for the DDM, the controls of the window control switch are also inoperative.

OBDII Code B1087 Mercury - Door Module LIN Bus 'A' - AutoCodes.com — B1087 Mercury Code - Door Module LIN Bus 'A'

What does this mean?

What are the Possible Causes of the DTC B1087 Mercury?

Faulty Window Control Switch
Window Control Switch harness is open or shorted
Window Control Switch circuit poor electrical connection
Faulty Driver Door Module (DDM)
Faulty Passenger Door Module (PDM)

How to Fix the DTC B1087 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 does this mean?

Code Tech Notes

B1087:83 LIN Bus 'A' Value Of Signal Protection Calculation Incorrect
B1087:86 LIN Bus 'A' Signal Invalid
B1087:88 LIN Bus 'A' Bus Off

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1087 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 B1087 Mercury Code

1. What are the common symptoms of OBDII code B1087 Mercury Door Module LIN Bus 'A'?

Symptoms may include issues with power windows, power door locks, interior lighting, and other functions controlled by the door module.

2. What are the possible causes of OBDII code B1087 in a Mercury vehicle?

Possible causes include a faulty door module LIN bus communication, damaged wiring or connectors, or a malfunctioning door module itself.

3. How can I diagnose the OBDII code B1087 related to the Door Module LIN Bus 'A' issue?

Diagnosis involves using a scan tool to retrieve the specific fault code, checking the wiring and connectors for any damage, and testing the door module's functionality.

4. Can a DIY enthusiast repair the OBDII code B1087 Door Module LIN Bus 'A' problem?

Depending on your experience and comfort level with automotive repairs, you may be able to repair this issue by replacing the door module or repairing the wiring. However, professional assistance is recommended for accurate diagnosis and repair.

5. Is it safe to continue driving with the OBDII code B1087 Mercury Door Module LIN Bus 'A' fault?

It is not recommended to drive with this fault as it may affect the proper functioning of essential vehicle systems controlled by the door module.

6. How much does it typically cost to repair the OBDII code B1087 related to the Door Module LIN Bus 'A' in a Mercury vehicle?

The cost of repair can vary depending on the specific cause of the issue, but it may involve replacing the door module, repairing wiring, or addressing connectivity issues. Professional repair costs can range from a few hundred to over a thousand dollars.

7. Are there any preventive measures to avoid encountering the OBDII code B1087 Door Module LIN Bus 'A' problem?

Regular maintenance checks, including inspecting wiring and connectors, can help prevent issues related to the door module LIN bus communication.

8. Can a low vehicle battery voltage trigger the OBDII code B1087 related to the Door Module LIN Bus 'A'?

Low battery voltage can potentially affect the communication between modules in the vehicle, including the door module LIN bus, leading to the triggering of this fault code.

9. How long does it typically take to repair the OBDII code B1087 Mercury Door Module LIN Bus 'A' issue?

The repair time can vary depending on the exact cause of the problem and the complexity of accessing and replacing the door module or repairing wiring. It may take a few hours to a full day for professional technicians to complete the repair.

10. Can resetting the vehicle's computer system clear the OBDII code B1087 Door Module LIN Bus 'A' fault?

Resetting the computer system may temporarily clear the fault code, but if the underlying issue with the door module LIN bus communication persists, the code is likely to reappear. It's important to diagnose and address the root cause of the problem for a lasting solution.