AutoCodes – Generic – B3922

B3922 Code - Front Wiper Function Select Circuit

Quick Answer

The Body Control Module (BCM) monitors the windshield wiper switch low signal circuit. Common causes include Faulty Turn Signal/Multifunction Switch, Turn Signal/Multifunction Switch harness is open or shorted, Turn Signal/Multifunction 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: B3922 indicates Front Wiper Function Select Circuit.
Common causes: Common causes include Faulty Turn Signal/Multifunction Switch, Turn Signal/Multifunction Switch harness is open or shorted, Turn Signal/Multifunction 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 3,717

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 Mar 25, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3922 Description

The Body Control Module (BCM) monitors the windshield wiper switch low signal circuit. When the wiper switch is place in the low position, battery voltage is applied through the switch contacts, a series of resistors, and the wiper switch low signal circuit to the BCM. The BCM then applies battery voltage through the wiper relay control circuit to energize the WPR Relay. When energized, battery voltage from the WPR Fuse is applied through the switch side of the WPR relay then through the switch side of the WPR HI relay to the windshield wiper motor. The Diagnostic Trouble Code (DTC) sets when the BCM detects a short to ground on the windshield wiper switch low signal circuit.

OBDII Code B3922 - Front Wiper Function Select Circuit - AutoCodes.com — B3922 Code - Front Wiper Function Select Circuit

What does this mean?

What are the Possible Causes of the DTC B3922?

Faulty Turn Signal/Multifunction Switch
Turn Signal/Multifunction Switch harness is open or shorted
Turn Signal/Multifunction Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B3922?

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 B3922 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 B3922 code?

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Need Help with the Code?

Get the B3922 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B3922 Buick — Front Wiper Function Select Circuit
B3922 Cadillac — Front Wiper Function Select Circuit
B3922 Chevrolet — Front Wiper Function Select Circuit
B3922 GMC — Front Wiper Function Select Circuit
B3922 Pontiac — Front Wiper Function Select Circuit
B3922 Saturn — Front Wiper Function Select Circuit

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 B3922 Code

1. What are the common symptoms of OBDII code B3922 - Front Wiper Function Select Circuit?

- The common symptoms include malfunctioning front wipers, wipers not responding to control inputs, or intermittent wiper operation.

2. What can cause the OBDII code B3922 to trigger?

- The code B3922 is typically triggered by a fault in the front wiper function select circuit, which could be caused by damaged wiring, a faulty wiper switch, or a defective wiper motor.

3. How can I diagnose the issue related to OBDII code B3922?

- To diagnose the issue, you can start by checking the wiring connections, inspecting the wiper switch for any damage, and testing the wiper motor for proper functioning using a multimeter.

4. Are there any DIY repair tips for fixing OBDII code B3922?

- DIY repair tips include checking and repairing any damaged wiring, replacing a faulty wiper switch if needed, or replacing the wiper motor if it is found to be defective.

5. Can OBDII code B3922 be a safety concern?

- Yes, OBDII code B3922 can be a safety concern as malfunctioning front wipers can impair visibility during inclement weather conditions, increasing the risk of accidents.

6. Is it safe to continue driving with OBDII code B3922 unresolved?

- It is not recommended to continue driving with OBDII code B3922 unresolved, as it can compromise your ability to clear your windshield effectively, especially in adverse weather conditions.

7. How much does it typically cost to repair OBDII code B3922?

- The cost of repairing OBDII code B3922 can vary depending on the specific cause of the issue, but it may involve expenses for parts replacement and labor costs, which could range from a few hundred to a thousand dollars.

8. Can a professional mechanic help with diagnosing and repairing OBDII code B3922?

- Yes, a professional mechanic with experience in automotive electrical systems can help diagnose and repair OBDII code B3922 efficiently, ensuring that the underlying issue is properly addressed.

9. Will resetting the OBDII system clear the B3922 code?

- Resetting the OBDII system may temporarily clear the B3922 code, but if the underlying issue causing the fault in the front wiper function select circuit is not addressed, the code is likely to reappear.

10. Are there any preventive measures to avoid encountering OBDII code B3922 in the future?

- To prevent encountering OBDII code B3922 in the future, it is advisable to regularly inspect and maintain the front wiper system, including checking wiring connections, ensuring proper wiper switch functionality, and lubricating the wiper mechanism as needed.