AutoCodes – Cadillac – B3930 Cadillac

B3930 Cadillac Code - Child Security Lock Motors Circuit

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 Cadillac indicates Child Security Lock Motors Circuit.
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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 445
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 17, 2023
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Code B3930 Cadillac 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, short to ground or an open/high resistance on the child security lock disable relay control circuit.
OBDII Code B3930 Cadillac - Child Security Lock Motors Circuit - AutoCodes.com
B3930 Cadillac Code - Child Security Lock Motors Circuit

What are the Possible Causes of the DTC B3930 Cadillac?

  • 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 Cadillac?

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 Cadillac 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 Cadillac Code

1. What are the common symptoms of OBDII code B3930 in a Cadillac related to the Child Security Lock Motors Circuit?

The common symptoms include malfunctioning child safety locks, inability to engage or disengage the locks, and warning lights on the dashboard indicating a child security system fault.

2. What are the possible causes of OBDII code B3930 in a Cadillac?

Potential causes of this code include faulty child security lock motors, damaged wiring or connectors in the circuit, a malfunctioning control module, or issues with the child security lock switch.

3. How can I diagnose the Child Security Lock Motors Circuit issue related to code B3930 in my Cadillac?

Diagnosing the problem involves conducting a thorough inspection of the child security lock system, checking the wiring and connectors for any damage, testing the child security lock motors for proper function, and using an OBDII scanner to retrieve the specific fault code.

4. Can I repair the Child Security Lock Motors Circuit problem causing OBDII code B3930 in my Cadillac myself?

Depending on the root cause of the issue, some repairs may be possible for DIY enthusiasts. Replacing faulty child security lock motors, repairing damaged wiring, or replacing a malfunctioning control module are tasks that can be done with the right tools and knowledge.

5. Is it safe to continue driving my Cadillac with OBDII code B3930 related to the Child Security Lock Motors Circuit?

It is not recommended to drive the vehicle with unresolved child security lock issues, as it may compromise the safety of passengers, especially children. It is advisable to address the problem promptly to ensure the proper function of the child security system.

6. How much does it typically cost to repair OBDII code B3930 in a Cadillac related to the Child Security Lock Motors Circuit?

Repair costs for this issue can vary depending on the specific cause of the problem, labor rates in your area, and whether you choose to repair it yourself or take it to a professional mechanic. It is best to obtain quotes from different repair shops to get an accurate estimate.

7. Are there any preventive maintenance tips to avoid OBDII code B3930 in a Cadillac?

Regularly inspecting the child security lock system, checking for any signs of wear or damage, and addressing any issues promptly can help prevent the occurrence of OBDII code B3930. Additionally, avoiding excessive force when engaging the child security locks can help prolong their lifespan.

8. Can OBDII code B3930 in a Cadillac be triggered by a loose connection in the Child Security Lock Motors Circuit?

Yes, a loose or poor connection in the wiring or connectors of the child security lock circuit can cause intermittent issues with the system, leading to the triggering of OBDII code B3930. It is essential to check all connections during diagnosis.

9. Is resetting the vehicle's computer system a recommended step after repairing OBDII code B3930 in a Cadillac?

Resetting the vehicle's computer system, also known as clearing the fault codes, is a good practice after repairing the issue related to OBDII code B3930. This step allows the system to relearn and recalibrate after the repair, ensuring proper functioning.

10. Can extreme weather conditions affect the Child Security Lock Motors Circuit and trigger OBDII code B3930 in a Cadillac?

Extreme temperatures, humidity, or exposure to moisture can potentially affect the child security lock motors, wiring, and connectors, leading to malfunctions in the circuit and triggering OBDII code B3930. It is essential to protect the components from harsh weather conditions to prevent such issues.

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