AutoCodes – Chevrolet – B318A 2014 Chevrolet Silverado

B318A 2014 Chevrolet Silverado Code - Left Rear Window Switch

Quick Answer

The driver and passenger window motors supply 12 V signal circuits to their respective window switches, when a window switch has been activated, a switch closes providing a ground to the appropriate signal circuit causing the voltage to drop to 0 V. Common causes include Faulty Left Rear Window Switch, Left Rear Window Switch harness is open or shorted, Left Rear Window 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: B318A 2014 Chevrolet Silverado indicates Left Rear Window Switch.
Common causes: Common causes include Faulty Left Rear Window Switch, Left Rear Window Switch harness is open or shorted, Left Rear Window 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 219

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 Jun 11, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B318A 2014 Chevrolet Silverado Description

The driver and passenger window motors supply 12 V signal circuits to their respective window switches, when a window switch has been activated, a switch closes providing a ground to the appropriate signal circuit causing the voltage to drop to 0 V. The window motor will detect the voltage drop in the signal circuit and will command the window to move in the desired direction.
The driver window master control switch also contains control switches for the passenger, left rear and right rear window functions. When a window switch is pressed, a serial data message is sent to the Body Control Module (BCM). The BCM examines the request and checks for messages from other power window motors that may prohibit window movement. If no prohibitive messages have been received, the BCM will send a serial data message to the passenger window motor or to the appropriate rear window switch which will perform the command as requested.

OBDII Code B318A 2014 Chevrolet Silverado - Left Rear Window Switch - AutoCodes.com — B318A 2014 Chevrolet Silverado Code - Left Rear Window Switch

What does this mean?

What are the Possible Causes of the DTC B318A 2014 Chevrolet Silverado?

Faulty Left Rear Window Switch
Left Rear Window Switch harness is open or shorted
Left Rear Window Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B318A 2014 Chevrolet Silverado?

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 B318A 2014 Chevrolet Silverado 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 B318A 2014 Chevrolet Silverado code?

Need more information on how to fix the B318A 2014 Chevrolet Silverado 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 B318A 2014 Chevrolet Silverado Code

1. What does the OBDII code B318A for a 2014 Chevrolet Silverado Left Rear Window Switch indicate?

The code B318A specifically relates to a fault detected in the left rear window switch of a 2014 Chevrolet Silverado.

2. What are the common symptoms of a B318A OBDII code in a 2014 Chevrolet Silverado?

Common symptoms include the left rear window switch not functioning properly, inability to control the left rear window, or erratic behavior of the window when using the switch.

3. What are the possible causes of the B318A OBDII code in a 2014 Chevrolet Silverado?

Potential causes include a faulty left rear window switch, wiring issues, a blown fuse, or a malfunction in the window regulator.

4. How can I diagnose the B318A OBDII code in my 2014 Chevrolet Silverado related to the Left Rear Window Switch?

Diagnosis typically involves checking the left rear window switch for proper functioning, inspecting the wiring for any damage, and testing the window regulator for any faults.

5. Can I repair the B318A OBDII code issue in my 2014 Chevrolet Silverado Left Rear Window Switch myself?

Depending on the cause, you may be able to replace the left rear window switch, repair any damaged wiring, or address the window regulator issue yourself if you have the necessary tools and expertise.

6. Is it safe to continue driving my 2014 Chevrolet Silverado with the B318A OBDII code related to the Left Rear Window Switch?

It is generally safe to drive the vehicle with this code, but it's recommended to address the issue promptly to avoid any inconvenience or safety concerns, especially in inclement weather.

7. How much does it typically cost to repair the B318A OBDII code issue in a 2014 Chevrolet Silverado Left Rear Window Switch?

Costs can vary depending on the exact cause of the issue, but replacing the left rear window switch or repairing wiring can range from $50 to $200, while fixing a window regulator may cost more.

8. Are there any recalls or technical service bulletins related to the B318A OBDII code in a 2014 Chevrolet Silverado Left Rear Window Switch?

It's advisable to check with a Chevrolet dealership or online resources for any recalls or technical service bulletins specifically addressing the B318A code in the left rear window switch of a 2014 Silverado.

9. How can I reset the OBDII code B318A in my 2014 Chevrolet Silverado after repairing the Left Rear Window Switch issue?

Once the repair is done, the OBDII code B318A can typically be reset using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes to clear the code.

10. Will fixing the B318A OBDII code issue in my 2014 Chevrolet Silverado Left Rear Window Switch affect other electrical components in the vehicle?

Fixing the issue should only address the specific problem with the left rear window switch and should not impact other electrical components unless they are directly related or affected by the same underlying cause.