AutoCodes – Mercury – B10C4 Mercury

B10C4 Mercury Code - Right Rear Unlock Pull Switch Signal Stuck High

Quick Answer

The Remote Function Actuator (RFA) Module interprets radio frequency signals from the Remote Functions Receiver (RFR) Module and Intelligent Access (IA) key transmitters. Common causes include Faulty Right Rear Unlock Pull Switch, Right Rear Unlock Pull Switch harness is open or shorted, Right Rear Unlock Pull Switch 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
B10C4 Mercury indicates Right Rear Unlock Pull Switch Signal Stuck High.
Common causes
Common causes include Faulty Right Rear Unlock Pull Switch, Right Rear Unlock Pull Switch harness is open or shorted, Right Rear Unlock Pull Switch 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 976
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Nov 19, 2024
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Code B10C4 Mercury Description

The Remote Function Actuator (RFA) Module interprets radio frequency signals from the Remote Functions Receiver (RFR) Module and Intelligent Access (IA) key transmitters. The RFA module receives input signals from various modules and other components. Based on this information, the RFA module generates an output signal to control various components such as the door locks and the liftgate. The OBDII code sets when the RFA module detects the right rear unlock sensor activated for more than 5 minutes.
OBDII Code B10C4 Mercury - Right Rear Unlock Pull Switch Signal Stuck High - AutoCodes.com
B10C4 Mercury Code - Right Rear Unlock Pull Switch Signal Stuck High

What are the Possible Causes of the DTC B10C4 Mercury?

  • Faulty Right Rear Unlock Pull Switch
  • Right Rear Unlock Pull Switch harness is open or shorted
  • Right Rear Unlock Pull Switch circuit poor electrical connection
  • Faulty Remote Function Actuator (RFA) Module

How to Fix the DTC B10C4 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 B10C4 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.

Need more information about the B10C4 Mercury code?

Need more information on how to fix the B10C4 Mercury code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B10C4 Mercury code diagnosed by a professional: Find a repair shop in your area

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 B10C4 Mercury Code

1. What are the common symptoms of OBDII code B10C4 in a Mercury related to the Right Rear Unlock Pull Switch Signal Stuck High?

- The common symptoms include issues with unlocking the right rear door using the pull switch, erratic behavior of the door lock system, and potential issues with the interior lights.

2. What can cause the Right Rear Unlock Pull Switch Signal to be stuck high in a Mercury triggering code B10C4?

- The most common causes of this issue are a faulty pull switch, damaged wiring or connectors, or a malfunctioning door lock actuator in the right rear door.

3. How can I diagnose the source of the Right Rear Unlock Pull Switch Signal Stuck High issue in my Mercury triggering code B10C4?

- To diagnose the problem, you can start by inspecting the pull switch, checking the wiring and connectors for any damage, and testing the door lock actuator for proper functionality.

4. Is it safe to continue driving my Mercury with the B10C4 code related to the Right Rear Unlock Pull Switch Signal Stuck High?

- It is generally not recommended to drive the vehicle with this issue unresolved, as it can lead to potential safety concerns such as difficulty in accessing the right rear door in emergencies.

5. Can I repair the B10C4 OBDII code related to the Right Rear Unlock Pull Switch Signal Stuck High in my Mercury by myself?

- Depending on your automotive repair skills, you may be able to address this issue yourself by replacing the faulty pull switch, repairing damaged wiring, or replacing the door lock actuator.

6. Will resetting the OBDII code B10C4 related to the Right Rear Unlock Pull Switch Signal Stuck High make the problem go away permanently?

- Resetting the code may temporarily clear the warning light, but unless the underlying issue causing the signal to be stuck high is addressed, the problem is likely to recur.

7. Are there any specific tools or equipment required to diagnose and repair the B10C4 code in a Mercury?

- Basic automotive tools such as a multimeter, wiring diagram for the vehicle, and potentially a trim removal tool might be needed to diagnose and repair the issue related to the Right Rear Unlock Pull Switch Signal Stuck High.

8. How long does it typically take to repair the B10C4 OBDII code on a Mercury associated with the Right Rear Unlock Pull Switch Signal Stuck High?

- The repair time can vary depending on the exact cause of the issue, but it may take anywhere from 1 to 3 hours to diagnose and fix the problem.

9. Can extreme weather conditions or moisture affect the triggering of the B10C4 code in a Mercury due to the Right Rear Unlock Pull Switch Signal Stuck High?

- Yes, extreme weather conditions or moisture can potentially exacerbate the issue by causing electrical connections to short out or components to malfunction, leading to the signal being stuck high.

10. Is it advisable to seek professional help from a mechanic for resolving the B10C4 OBDII code related to the Right Rear Unlock Pull Switch Signal Stuck High in my Mercury?

- If you are not confident in your ability to diagnose or repair the issue yourself, it is recommended to seek assistance from a qualified mechanic to ensure the problem is properly resolved.

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