AutoCodes – Generic – B3930:01

B3930:01 Code - Child Security Lock Motors Circuit Short to Battery

Quick Answer

The Body Control Module (BCM) controls the Child Security Lock Relay when it receives a command to lockout the rear doors. Common causes include Faulty Child Security Lock Relay, Child Security Lock Relay harness is open or shorted, Child Security Lock Relay 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: B3930:01 indicates Child Security Lock Motors Circuit Short to Battery.
Common causes: Common causes include Faulty Child Security Lock Relay, Child Security Lock Relay harness is open or shorted, Child Security Lock Relay 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 396

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 17, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3930:01 Description

The Body Control Module (BCM) controls the Child Security Lock Relay when it receives a command to lockout the rear doors. The relay will apply voltage to both child security circuits at the rear door latches to disable the interior door handles. The Diagnostic Trouble Code (DTC) sets when the BCM detects a short to voltage on the child security lock disable relay control circuit.

OBDII Code B3930:01 - Child Security Lock Motors Circuit Short to Battery - AutoCodes.com — B3930:01 Code - Child Security Lock Motors Circuit Short to Battery

What does this mean?

What are the Possible Causes of the DTC B3930:01?

Faulty Child Security Lock Relay
Child Security Lock Relay harness is open or shorted
Child Security Lock Relay circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B3930:01?

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 B3930:01 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 B3930:01 Code

1. What does the OBDII code B3930:01 mean?

This code indicates a "Child Security Lock Motors Circuit Short to Battery," meaning there is an electrical issue in the child lock motor circuit, likely caused by a short to the battery.

2. What are the common symptoms of code B3930:01?

Symptoms may include child safety locks not functioning properly, difficulty engaging or disengaging the locks, or a warning light on the dashboard.

3. What causes code B3930:01?

Common causes include damaged wiring, a short circuit in the child lock motor circuit, a faulty child lock motor, or a malfunctioning control module.

4. How is code B3930:01 diagnosed?

A technician will inspect the wiring and connectors, test the child lock motor for proper function, and check for voltage or short circuits in the circuit.

5. Can I still drive my car with code B3930:01?

Yes, but the child safety locks may not work, posing a safety risk, especially if you have children in the vehicle.

6. How do I fix code B3930:01?

Repairs may involve replacing damaged wiring, repairing or replacing the child lock motor, or addressing issues with the control module.

7. How much does it cost to fix code B3930:01?

Costs vary based on the specific issue but may range from $100 to $500, depending on whether wiring, the motor, or other components need repair or replacement.

8. Can I reset code B3930:01 by disconnecting the battery?

Disconnecting the battery might clear the code temporarily, but it wonâ€™t fix the underlying issue, and the code is likely to return.

9. What tools are needed to diagnose code B3930:01?

A diagnostic scanner, multimeter, and wiring diagrams for the vehicle are typically required to diagnose this code.

10. Is code B3930:01 a common issue in vehicles?

This code is not extremely common but can occur in vehicles with electronic child safety lock systems, especially if there is wear or damage to the wiring.