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Engine-Codes – Generic – B3930:02

B3930:02 Code - Child Security Lock Motors Circuit Short to Ground

Quick Answer

The B3930:02 diagnostic trouble code (DTC) indicates that there is a short to ground in the child security lock motors circuit. Common causes include Short to ground in the wiring of the child security lock motors circuit, Malfunctioning child security lock motor, Faulty control module responsible for controlling the child security locks. 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
B3930:02 indicates Child Security Lock Motors Circuit Short to Ground.
Common causes
Common causes include Short to ground in the wiring of the child security lock motors circuit, Malfunctioning child security lock motor, Faulty control module responsible for controlling the child security locks.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code B3930:02 Description

The B3930:02 diagnostic trouble code (DTC) indicates that there is a short to ground in the child security lock motors circuit. In vehicles equipped with child security locks, these locks prevent the rear doors from being opened from the inside, providing additional safety for children in the back seats. When there is a short to ground in the circuit controlling these motors, it can prevent the child security locks from functioning properly.

OBDII Code B3930:02 - Child Security Lock Motors Circuit Short to Ground
B3930:02 Code - Child Security Lock Motors Circuit Short to Ground

Common Causes of B3930:02

  1. Short to ground in the wiring of the child security lock motors circuit.
  2. Malfunctioning child security lock motor.
  3. Faulty control module responsible for controlling the child security locks.
  4. Corrosion or damage to the electrical connectors related to the child security lock system.
  5. Physical damage to the child security lock mechanism due to impact or wear.

Symptoms of B3930:02

  1. Inability to engage or disengage the child security locks.
  2. Rear doors can be opened from the inside while the vehicle is in motion.
  3. Warning light on the dashboard indicating a child security lock system fault.
  4. Unusual clicking or buzzing noises coming from the rear doors when attempting to engage the child security locks.

How to Fix B3930:02

  1. Begin by conducting a thorough visual inspection of the child security lock system, checking for any visible signs of damage, corrosion, or loose connections.
  2. Use a multimeter to test the continuity and resistance of the wiring in the child security lock motors circuit to identify the location of the short to ground.
  3. Inspect the child security lock motors and control module for proper operation and replace any components that are found to be faulty.
  4. Clear the DTC from the vehicle's onboard diagnostic system using a diagnostic scan tool and test the child security lock system to ensure proper functionality.
  5. If necessary, recalibrate or reprogram the control module to ensure the child security locks operate correctly.

Cost to Fix B3930:02

The typical repair costs for addressing a child security lock motors circuit short to ground issue can vary depending on the specific cause of the problem and the extent of the repairs needed. In general, the parts required for this repair, such as a new child security lock motor or control module, can range from $50 to $200 or more. Labor costs for a repair of this nature may fall between $100 and $300, with total repair costs potentially ranging from $150 to $500 or higher.

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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 B3930:02 Code

1. What does OBDII code B3930:02 mean?

Code B3930:02 indicates a short-to-ground issue in the child security lock motors circuit, which controls the electronic child safety locks on the vehicle's doors.

2. What are the common symptoms of code B3930:02?

Symptoms include child safety locks not engaging or disengaging, warning lights on the dashboard, or unresponsive door lock controls.

3. What causes code B3930:02 to trigger?

This code is typically caused by damaged wiring, a short to ground in the circuit, a faulty child lock motor, or a malfunctioning control module.

4. Can I still drive my car with code B3930:02?

Yes, but the child safety locks might not function properly, which could pose a safety risk for passengers, especially children.

5. How do I diagnose code B3930:02?

Start by inspecting the wiring and connectors for damage or corrosion, check the child lock motor for faults, and verify the circuit for continuity and shorts to ground.

6. How do I fix code B3930:02?

Repairs may include replacing damaged wiring, repairing the short to ground, replacing the faulty child lock motor, or reprogramming/replacing the control module.

7. What tools are needed to troubleshoot code B3930:02?

A digital multimeter, OBDII scanner, and wiring diagrams specific to your vehicle are essential for diagnosing this issue.

8. Can a blown fuse cause code B3930:02?

Yes, a blown fuse in the child lock circuit can cause this code, so inspecting the fuses should be part of the diagnostic process.

9. How much does it cost to fix code B3930:02?

Repair costs vary depending on the issue, but wiring repairs or motor replacements typically cost between $100 and $400, excluding labor.

10. Can I fix code B3930:02 myself?

If you have experience with automotive electrical systems and the necessary tools, you may be able to fix the issue. Otherwise, it’s best to consult a professional.

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