AutoCodes – Cadillac – B1740 Cadillac

B1740 Cadillac Code - Driver Seat Front Down Switch Circuit

Quick Answer

The Seat Memory Control Module supplies a reference voltage to each signal circuit of the Driver Seat Adjuster Switch. Common causes include Faulty Driver Seat Adjuster Switch, Driver Seat Adjuster Switch harness is open or shorted, Driver Seat Adjuster 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: B1740 Cadillac indicates Driver Seat Front Down Switch Circuit.
Common causes: Common causes include Faulty Driver Seat Adjuster Switch, Driver Seat Adjuster Switch harness is open or shorted, Driver Seat Adjuster 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 1,054

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 Apr 23, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1740 Cadillac Description

The Seat Memory Control Module supplies a reference voltage to each signal circuit of the Driver Seat Adjuster Switch. When the power seat or lumbar switches are pressed, the appropriate signal circuit from the Seat Memory Control Module is pulled low through the switch contacts indicating the power seat command. The Seat Memory Control Module then commands the driver seat or lumbar to move in response to the switch signals. The Diagnostic Trouble Code (DTC) will be set when there is a short to ground on a switch signal circuit.

OBDII Code B1740 Cadillac - Driver Seat Front Down Switch Circuit - AutoCodes.com — B1740 Cadillac Code - Driver Seat Front Down Switch Circuit

What does this mean?

What are the Possible Causes of the DTC B1740 Cadillac?

Faulty Driver Seat Adjuster Switch
Driver Seat Adjuster Switch harness is open or shorted
Driver Seat Adjuster Switch circuit poor electrical connection
Faulty Seat Memory Control Module

How to Fix the DTC B1740 Cadillac?

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 B1740 Cadillac 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 B1740 Cadillac Code

1. What are the common symptoms of OBDII code B1740 in a Cadillac related to the Driver Seat Front Down Switch Circuit?

- The common symptoms include the inability to adjust the driver's seat front down, erratic seat movement, or complete seat adjustment failure.

2. What are the possible causes of OBDII code B1740 in a Cadillac?

- The code B1740 in a Cadillac is typically caused by a malfunction in the driver seat front down switch circuit, a faulty seat control module, wiring issues, or a defective seat motor.

3. How can I diagnose the OBDII code B1740 in my Cadillac?

- To diagnose the code B1740, you can use an OBDII scanner to retrieve the specific error code. Additionally, inspecting the seat control module, checking the wiring connections, and testing the seat motor can help pinpoint the issue.

4. What are some repair tips for fixing OBDII code B1740 in a Cadillac?

- Repairing the code B1740 may involve replacing the driver seat front down switch, repairing any damaged wiring, resetting the seat control module, or replacing the seat motor if necessary.

5. Can I drive my Cadillac with OBDII code B1740 present?

- It is not recommended to drive your Cadillac with the OBDII code B1740 present, as the driver's seat adjustment functionality may be compromised, affecting your comfort and safety while driving.

6. Is it possible to reset the OBDII code B1740 in a Cadillac without repairing the issue?

- While you can reset the code using an OBDII scanner, it is essential to address the underlying problem causing the code to prevent it from reoccurring.

7. How much does it typically cost to repair OBDII code B1740 in a Cadillac?

- The cost of repairing OBDII code B1740 in a Cadillac can vary depending on the exact cause of the issue, but it may range from a few hundred to a few thousand dollars, including parts and labor.

8. Can a DIY enthusiast fix OBDII code B1740 in a Cadillac?

- If you have experience with automotive repairs and access to the necessary tools, you may be able to diagnose and repair OBDII code B1740 in your Cadillac. However, it is recommended to consult a professional if you are unsure.

9. Does OBDII code B1740 affect the overall performance of my Cadillac?

- OBDII code B1740 specifically relates to the driver seat front down switch circuit and does not directly impact the overall performance of your Cadillac. However, it can affect the convenience and functionality of adjusting the driver's seat.

10. How can regular maintenance help prevent OBDII code B1740 from occurring in my Cadillac?

- Regularly inspecting and maintaining the electrical components, wiring, and seat controls in your Cadillac can help prevent issues like OBDII code B1740 from occurring. Additionally, addressing any minor problems promptly can avoid more significant issues in the future.