AutoCodes – Mazda – B1897 Mazda

B1897 Mazda Code - Horn Switch Circuit Failure

Quick Answer

The horn relay control and switched voltage is supplied by the Bussed Electrical Center (BEC). Common causes include Faulty Horn Relay, Faulty Horn Switch, Horn Switch harness is open or shorted. 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: B1897 Mazda indicates Horn Switch Circuit Failure.
Common causes: Common causes include Faulty Horn Relay, Faulty Horn Switch, Horn Switch harness is open or shorted.
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 830

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 Jul 26, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1897 Mazda Description

The horn relay control and switched voltage is supplied by the Bussed Electrical Center (BEC). The Smart Junction Box (SJB) receives the horn signal from the horn switch (part of the steering wheel). When the horn switch is pressed, the ground is supplied from the clockspring to the vehicle harness. The SJB then activates the horn relay. Voltage is then sent to the horn, enabling the horns to sound. The ground is provided to the horns.

OBDII Code B1897 Mazda - Horn Switch Circuit Failure - AutoCodes.com — B1897 Mazda Code - Horn Switch Circuit Failure

What does this mean?

What are the Possible Causes of the DTC B1897 Mazda?

Faulty Horn Relay
Faulty Horn Switch
Horn Switch harness is open or shorted
Horn Switch circuit poor electrical connection
Faulty Clockspring
Faulty Body Control Module (BCM)

How to Fix the DTC B1897 Mazda?

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 B1897 Mazda 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 B1897 Mazda Code

1. What are the common symptoms of OBDII code B1897 Mazda (Horn Switch Circuit Failure)?

- The common symptoms include a non-functional horn, horn honking on its own, or the horn not responding consistently when pressed.

2. What are the potential causes of OBDII code B1897 Mazda?

- The code B1897 is typically triggered by a faulty horn switch, wiring issues in the horn circuit, or a malfunction in the horn relay.

3. How can I diagnose the Horn Switch Circuit Failure in my Mazda?

- To diagnose the issue, you can start by checking the horn fuse, testing the horn relay, inspecting the wiring for any damage, and examining the horn switch for proper functionality.

4. Can a malfunctioning clock spring cause OBDII code B1897 in a Mazda?

- Yes, a faulty clock spring can also lead to the Horn Switch Circuit Failure code B1897 in Mazda vehicles, as it may disrupt the electrical connection to the horn.

5. Is it safe to continue driving with OBDII code B1897 triggered in my Mazda?

- While driving with a non-functional horn is not ideal, it is generally safe to continue driving with the B1897 code triggered. However, it is recommended to address the issue promptly.

6. How can I repair OBDII code B1897 in my Mazda?

- Repairing the Horn Switch Circuit Failure code B1897 may involve replacing the horn switch, repairing any damaged wiring, checking and replacing the horn relay if necessary, or addressing any issues with the clock spring.

7. Can I reset OBDII code B1897 in my Mazda using an OBDII scanner?

- Yes, you can reset the B1897 code using an OBDII scanner once the underlying issue with the horn switch circuit has been resolved. This will clear the code from the vehicle's system.

8. Are there any preventative measures to avoid OBDII code B1897 in my Mazda?

- To prevent the Horn Switch Circuit Failure code B1897, it is important to perform regular inspections of the horn system, address any horn-related issues promptly, and ensure proper maintenance of the electrical components.

9. Will fixing OBDII code B1897 affect the overall functionality of my Mazda's horn?

- Yes, resolving the Horn Switch Circuit Failure code B1897 will restore the functionality of your Mazda's horn, ensuring it responds correctly when activated.

10. How long does it usually take to repair OBDII code B1897 in a Mazda?

- The time needed to repair the Horn Switch Circuit Failure code B1897 in a Mazda can vary depending on the specific cause of the issue. Simple fixes like replacing a fuse or relay may take a short time, while more complex repairs involving wiring or components replacement may require more time.