AutoCodes – Lincoln – B2404 Lincoln

B2404 Lincoln Code - Audio Steering Wheel Switch Circuit Fault

Quick Answer

Two different steering wheel switch configurations are available, depending on whether the vehicle is equipped with the SYNC system. Common causes include Faulty Audio Steering Wheel Switch, Audio Steering Wheel Switch harness is open or shorted, Audio Steering Wheel 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: B2404 Lincoln indicates Audio Steering Wheel Switch Circuit Fault.
Common causes: Common causes include Faulty Audio Steering Wheel Switch, Audio Steering Wheel Switch harness is open or shorted, Audio Steering Wheel 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 801

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 Dec 05, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2404 Lincoln Description

Two different steering wheel switch configurations are available, depending on whether the vehicle is equipped with the SYNC system.
On vehicles without the SYNC system, all of the steering wheel control switches are wired to the Audio Control Module (ACM). The steering wheel controls are: VOL+, VOL-, SEEK+, SEEK-, and MEDIA. The SEEK+ and SEEK- switches are represented by arrows.
For vehicles equipped with the SYNC system, the steering wheel controls are: VOL+, VOL-, SEEK+, SEEK-, MEDIA, VOICE, PHONE, and OK. The SEEK+ and SEEK- switches are represented by arrows, the VOICE button is represented by an icon of someone speaking, and the PHONE button is represented by an icon of a phone with an up-and-down arrow. The VOICE, PHONE, and OK switches are wired to the accessory protocol interface module (APIM), while the remaining switches are wired to the ACM.
For all switches, a reference voltage is sent from the appropriate module to the steering wheel controls. When a switch is pressed, the voltage is routed through a specific resistor value for each function. The module provides the ground for the reference voltage. The module uses this reference voltage to determine which control input function has been selected.

OBDII Code B2404 Lincoln - Audio Steering Wheel Switch Circuit Fault - AutoCodes.com — B2404 Lincoln Code - Audio Steering Wheel Switch Circuit Fault

What does this mean?

What are the Possible Causes of the DTC B2404 Lincoln?

Faulty Audio Steering Wheel Switch
Audio Steering Wheel Switch harness is open or shorted
Audio Steering Wheel Switch circuit poor electrical connection

How to Fix the DTC B2404 Lincoln?

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 B2404 Lincoln 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 B2404 Lincoln Code

1. What are the common symptoms of OBDII code B2404 in a Lincoln related to the Audio Steering Wheel Switch Circuit Fault?

- Common symptoms include non-functional audio controls on the steering wheel, unresponsive volume adjustments, and a malfunctioning mute button.

2. What are the possible causes of the Audio Steering Wheel Switch Circuit Fault OBDII code B2404 in a Lincoln?

- The code B2404 can be triggered by issues such as a faulty steering wheel audio control switch, damaged wiring harness, or a malfunctioning audio control module.

3. How can I diagnose the Audio Steering Wheel Switch Circuit Fault in a Lincoln with OBDII code B2404?

- Diagnosis involves using a scan tool to retrieve the trouble code, inspecting the steering wheel audio controls for physical damage, and checking the wiring for any signs of wear or disconnection.

4. Are there any simple repair tips for addressing the OBDII code B2404 related to the Audio Steering Wheel Switch Circuit Fault in a Lincoln?

- A common repair involves replacing the faulty steering wheel audio control switch or repairing any damaged wiring connections. Ensure all electrical connections are secure.

5. Can the Audio Steering Wheel Switch Circuit Fault OBDII code B2404 in a Lincoln be fixed without professional help?

- While some basic repairs like checking and securing connections can be done by DIY enthusiasts, complex issues may require the expertise of a qualified mechanic for proper diagnosis and repair.

6. How important is it to address the OBDII code B2404 related to the Audio Steering Wheel Switch Circuit Fault in a Lincoln promptly?

- It is important to address the issue promptly to ensure the proper functioning of the audio controls on the steering wheel and to prevent any potential safety hazards or further damage to the vehicle's electrical system.

7. Can resetting the vehicle's computer system clear the OBDII code B2404 for the Audio Steering Wheel Switch Circuit Fault in a Lincoln?

- Resetting the computer system may temporarily clear the code, but if the underlying issue causing the fault is not addressed, the code is likely to reappear after some time.

8. Is it safe to continue driving a Lincoln with the OBDII code B2404 related to the Audio Steering Wheel Switch Circuit Fault present?

- While the vehicle may still be operable with the fault, it is recommended to address the issue as soon as possible to prevent potential inconvenience and ensure all vehicle systems are functioning properly.

9. Will the OBDII code B2404 for the Audio Steering Wheel Switch Circuit Fault cause the Lincoln's audio system to stop working altogether?

- While the code may affect certain audio control functions on the steering wheel, it typically does not cause the entire audio system to stop working. However, addressing the issue promptly is still advised.

10. How can I prevent the recurrence of the OBDII code B2404 related to the Audio Steering Wheel Switch Circuit Fault in my Lincoln?

- Regularly inspecting and maintaining the steering wheel audio controls, ensuring proper wiring connections, and promptly addressing any issues can help prevent the code B2404 from recurring.