AutoCodes – Chevrolet – B1790 Chevrolet

B1790 Chevrolet Code - Driver Seat Motor Lumbar Circuit

Quick Answer

The seat adjuster motors are controlled by the Driver Seat Module (DSM) through the adjuster motor control circuits. Common causes include Faulty Driver Seat Motor Lumbar, Driver Seat Motor Lumbar harness is open or shorted, Driver Seat Motor Lumbar 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: B1790 Chevrolet indicates Driver Seat Motor Lumbar Circuit.
Common causes: Common causes include Faulty Driver Seat Motor Lumbar, Driver Seat Motor Lumbar harness is open or shorted, Driver Seat Motor Lumbar 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 919

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 Oct 16, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1790 Chevrolet Description

The seat adjuster motors are controlled by the Driver Seat Module (DSM) through the adjuster motor control circuits. In an inactive state both of the motor control circuits are grounded within the DSM. In an active state the DSM switches the appropriate motor control circuit to battery positive voltage. The direction of the adjuster motor rotation is determined by which of the motor control circuits is switched to battery positive voltage while the other remains grounded. During adjuster motor operation the DSM also monitors the current flow through the motor control circuits.

OBDII Code B1790 Chevrolet - Driver Seat Motor Lumbar Circuit - AutoCodes.com — B1790 Chevrolet Code - Driver Seat Motor Lumbar Circuit

What does this mean?

What are the Possible Causes of the DTC B1790 Chevrolet?

Faulty Driver Seat Motor Lumbar
Driver Seat Motor Lumbar harness is open or shorted
Driver Seat Motor Lumbar circuit poor electrical connection
Faulty Driver Seat Module (DSM)

How to Fix the DTC B1790 Chevrolet?

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 B1790 Chevrolet 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 B1790 Chevrolet code?

Need more information on how to fix the B1790 Chevrolet code? Get Access to Factory Service Manuals

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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 B1790 Chevrolet Code

1. What are the common symptoms of OBDII code B1790 in a Chevrolet related to the Driver Seat Motor Lumbar Circuit?

- Common symptoms may include the inability to adjust the lumbar support in the driver seat or the lumbar support moving on its own.

2. What are some possible causes of OBDII code B1790 in a Chevrolet?

- Possible causes may include a faulty lumbar support motor, damaged wiring or connectors in the lumbar circuit, or a malfunctioning lumbar switch.

3. How can I diagnose the issue related to OBDII code B1790 in my Chevrolet's Driver Seat Motor Lumbar Circuit?

- You can start by visually inspecting the lumbar support motor, checking the wiring and connectors for any damage, and testing the lumbar switch for proper functionality.

4. Can I repair the Driver Seat Motor Lumbar Circuit issue myself?

- Depending on your mechanical skills, you may be able to repair the issue yourself by replacing the faulty lumbar support motor, repairing damaged wiring, or replacing the lumbar switch.

5. Is it safe to drive my Chevrolet with OBDII code B1790 related to the Driver Seat Motor Lumbar Circuit?

- It is generally safe to drive your vehicle with this code, but you may experience discomfort from the lack of lumbar support adjustment.

6. Will resetting the OBDII code B1790 in my Chevrolet fix the issue permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to reappear.

7. How much does it typically cost to repair OBDII code B1790 in a Chevrolet?

- The cost of repair can vary depending on the specific cause of the issue, but it may range from a few hundred dollars for parts and labor.

8. Can OBDII code B1790 in a Chevrolet affect other systems in the vehicle?

- This code is specific to the Driver Seat Motor Lumbar Circuit and is unlikely to directly impact other systems in the vehicle.

9. What are some preventive maintenance tips to avoid OBDII code B1790 in a Chevrolet?

- Regularly inspecting the lumbar support system, avoiding putting excessive pressure on the lumbar support, and addressing any issues promptly can help prevent this code from appearing.

10. Is there a recall or service bulletin related to OBDII code B1790 in Chevrolet vehicles?

- It is recommended to check with a Chevrolet dealership or visit the National Highway Traffic Safety Administration (NHTSA) website for any related recalls or service bulletins regarding this code.