AutoCodes – Cadillac – B3130 Cadillac

B3130 Cadillac Code - All Doors Unlock Circuit

Quick Answer

The Body Control Module (BCM) supplies a 12-volt signal to the lock and unlock signal circuits of the driver and passenger door lock switches. Common causes include Faulty Door Latch Assembly, Door Latch Assembly harness is open or shorted, Door Latch Assembly 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: B3130 Cadillac indicates All Doors Unlock Circuit.
Common causes: Common causes include Faulty Door Latch Assembly, Door Latch Assembly harness is open or shorted, Door Latch Assembly 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 1,236

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 B3130 Cadillac Description

The Body Control Module (BCM) supplies a 12-volt signal to the lock and unlock signal circuits of the driver and passenger door lock switches. When the appropriate switch is pressed, a contact within the door lock switch closes providing a ground path for the signal circuit. The BCM will detect the voltage drop in the signal and will command the doors to perform the lock or unlock functions. The BCM may also receive a LOCK or UNLOCK command from the Keyless Entry Control Module.
The BCM, upon receipt of a lock switch lock or unlock signal, will supply voltage to the door lock actuator lock or unlock control circuits. Since the opposite side of the lock actuator is connected to the ground through the other lock actuator control circuit, the doors will then lock or unlock as commanded. The Diagnostic Trouble Code (DTC) sets when the BCM detects a short to ground or open/high resistance on a door latch control circuit.

OBDII Code B3130 Cadillac - All Doors Unlock Circuit - AutoCodes.com — B3130 Cadillac Code - All Doors Unlock Circuit

What does this mean?

What are the Possible Causes of the DTC B3130 Cadillac?

Faulty Door Latch Assembly
Door Latch Assembly harness is open or shorted
Door Latch Assembly circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B3130 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 B3130 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 B3130 Cadillac Code

1. What does the OBDII code B3130 mean on a Cadillac?

The code B3130 indicates a malfunction in the all doors unlock circuit, which affects the vehicle's ability to unlock all doors electronically.

2. What are the common symptoms of the B3130 code in a Cadillac?

Symptoms may include failure to unlock all doors using the key fob or door switch, intermittent unlocking issues, or no response from the door actuators.

3. What causes the B3130 code to appear?

Common causes include a faulty door lock actuator, damaged wiring or connectors in the unlock circuit, a malfunctioning body control module (BCM), or a blown fuse.

4. Can I still drive my Cadillac with the B3130 code active?

Yes, you can still drive the vehicle, but the convenience and security of automatic door unlocking may be compromised.

5. How do I diagnose the B3130 code on a Cadillac?

Start by inspecting the door lock actuators, fuses, wiring, and connectors in the unlock circuit. Use a scan tool to check for BCM communication errors.

6. How do I fix the B3130 code in a Cadillac?

Repairs may involve replacing a faulty door lock actuator, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the BCM if necessary.

7. Can a dead key fob battery cause the B3130 code?

No, a dead key fob battery typically does not cause this code, as the issue is related to the unlock circuit, not the key fob itself.

8. What tools are needed to troubleshoot the B3130 code?

Youâ€™ll need a diagnostic scan tool, a multimeter to check electrical continuity, and possibly wiring diagrams for the unlock circuit.

9. Is the B3130 code specific to Cadillac vehicles?

While the code can appear in other GM vehicles, the exact symptoms and affected systems may vary. For Cadillac, it specifically pertains to the all doors unlock circuit.

10. How much does it cost to repair the B3130 code on a Cadillac?

Repair costs vary depending on the issue. Replacing a door lock actuator may cost $150-$300, while BCM replacement and programming can cost $400-$800 or more.