AutoCodes – Generic – B1543

B1543 Code - Seat Direction Switch Assembly Circuit Failure

Quick Answer

The Body Control Module (BCM) monitors the Seat Direction Switch Assembly. Common causes include Faulty Seat Direction Switch Assembly, Seat Direction Switch Assembly harness is open or shorted, Seat Direction Switch Assembly 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: B1543 indicates Seat Direction Switch Assembly Circuit Failure.
Common causes: Common causes include Faulty Seat Direction Switch Assembly, Seat Direction Switch Assembly harness is open or shorted, Seat Direction Switch Assembly 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 9,682

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 May 02, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1543 Description

The Body Control Module (BCM) monitors the Seat Direction Switch Assembly. The BCM sets the OBDII code when the Seat Direction Switch Assembly is not to factory specifications.

OBDII Code B1543 - Seat Direction Switch Assembly Circuit Failure - AutoCodes.com — B1543 Code - Seat Direction Switch Assembly Circuit Failure

What does this mean?

What are the Possible Causes of the DTC B1543?

Faulty Seat Direction Switch Assembly
Seat Direction Switch Assembly harness is open or shorted
Seat Direction Switch Assembly circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B1543?

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 B1543 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 B1543 code?

Need more information on how to fix the B1543 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1543 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1543 Buick — Oil Temperature Circuit Open
B1543 Cadillac — Oil Temperature Circuit Open
B1543 Chevrolet — Oil Temperature Circuit Open
B1543 GMC — Oil Temperature Circuit Open

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 B1543 Code

1. What are the common symptoms of OBDII code B1543 (Seat Direction Switch Assembly Circuit Failure)?

- The common symptoms include non-responsive seat adjustment controls, erratic movement of the seat, or complete failure of seat adjustment functionality.

2. What are the possible causes of OBDII code B1543?

- The code B1543 can be caused by a faulty seat direction switch assembly, damaged wiring or connectors in the seat adjustment circuit, or a malfunctioning control module.

3. How can I diagnose the cause of OBDII code B1543?

- To diagnose the issue, you can start by inspecting the seat direction switch for any visible damage or wear. You can also use a multimeter to test the continuity of the switch and check for any wiring issues.

4. Can I still drive my vehicle with OBDII code B1543?

- It is not recommended to drive your vehicle with OBDII code B1543, especially if the seat adjustment controls are not functioning properly. It can affect your driving position and compromise safety.

5. How can I repair OBDII code B1543?

- Depending on the cause, you may need to replace the seat direction switch assembly, repair damaged wiring or connectors, or reprogram the control module. Consult a professional mechanic for a proper diagnosis and repair.

6. Is OBDII code B1543 a serious issue?

- While it may not affect the drivability of the vehicle, OBDII code B1543 should be addressed promptly to ensure the proper functioning of the seat adjustment system and overall safety.

7. Can I reset OBDII code B1543 with a simple scan tool?

- Yes, you can use an OBDII scan tool to reset the code after addressing the underlying issue. However, if the problem persists, the code is likely to reappear.

8. Are there any preventive measures to avoid OBDII code B1543?

- Regularly inspecting and maintaining the seat adjustment system, including the direction switch and wiring, can help prevent issues leading to OBDII code B1543.

9. How long does it take to repair OBDII code B1543?

- The repair time for OBDII code B1543 can vary depending on the exact cause of the issue. It could take anywhere from a few hours to a day, depending on the complexity of the repair.

10. Can OBDII code B1543 be triggered intermittently?

- Yes, OBDII code B1543 can be triggered intermittently, especially if the underlying issue is related to a loose connection or sporadic electrical fault.