AutoCodes – Chevrolet – B3103 Chevrolet

B3103 Chevrolet Code - Keyless Entry Data Link Circuit High

Quick Answer

The Remote Control Door Lock Receiver (RCDLR) communicates with the Body Control Module (BCM) through the keyless entry serial data circuit. Common causes include Faulty Remote Control Door Lock Receiver (RCDLR), Remote Control Door Lock Receiver (RCDLR) harness is open or shorted, Remote Control Door Lock Receiver (RCDLR) 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: B3103 Chevrolet indicates Keyless Entry Data Link Circuit High.
Common causes: Common causes include Faulty Remote Control Door Lock Receiver (RCDLR), Remote Control Door Lock Receiver (RCDLR) harness is open or shorted, Remote Control Door Lock Receiver (RCDLR) 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 1,146

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Mar 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3103 Chevrolet Description

The Remote Control Door Lock Receiver (RCDLR) communicates with the Body Control Module (BCM) through the keyless entry serial data circuit. When any button on the keyless entry transmitter is pressed, the transmitter sends a signal to the RCDLR. The RCDLR sends a lock, unlock, rear release, or panic alarm request to the BCM, depending on which button is pressed on the transmitter. The BCM receives the message and performs the appropriate function. The BCM also uses the keyless entry serial data circuit in order to communicate with the RCDLR when programming transmitters.

OBDII Code B3103 Chevrolet - Keyless Entry Data Link Circuit High - AutoCodes.com — B3103 Chevrolet Code - Keyless Entry Data Link Circuit High

What does this mean?

What are the Possible Causes of the DTC B3103 Chevrolet?

Faulty Remote Control Door Lock Receiver (RCDLR)
Remote Control Door Lock Receiver (RCDLR) harness is open or shorted
Remote Control Door Lock Receiver (RCDLR) circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B3103 Chevrolet?

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 B3103 Chevrolet 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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Need Help with the Code?

Get the B3103 Chevrolet code diagnosed by a professional: Find a repair shop in your area

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 B3103 Chevrolet Code

1. What does OBDII code B3103 mean on a Chevrolet?

Code B3103 refers to a "Keyless Entry Data Link Circuit High" issue, indicating a problem with the communication circuit related to the keyless entry system.

2. What are the symptoms of code B3103 in a Chevrolet?

Symptoms may include the key fob not working to lock or unlock doors, intermittent functionality of the keyless entry system, or warning lights on the dashboard.

3. What causes the B3103 code in a Chevrolet?

Common causes include a faulty keyless entry module, damaged wiring or connectors in the data link circuit, or a malfunctioning key fob.

4. Can a weak battery in the key fob cause code B3103?

A weak key fob battery is unlikely to directly trigger B3103, but it can cause similar symptoms. Replacing the battery is a good first step to rule out that issue.

5. How do I diagnose a B3103 code on my Chevrolet?

Diagnosis involves checking the keyless entry module, inspecting wiring and connectors for damage or corrosion, and verifying proper voltage and ground signals in the circuit.

6. Is code B3103 specific to Chevrolet vehicles?

While B3103 can appear on other makes, the exact description and troubleshooting steps may vary. For Chevrolet, it specifically refers to the keyless entry data link circuit.

7. Can I still drive my Chevrolet with a B3103 code?

Yes, the vehicle is generally drivable, but you may experience issues with the keyless entry system, which could be inconvenient.

8. How much does it cost to repair a B3103 code on a Chevrolet?

Repair costs vary depending on the cause. Replacing a keyless entry module may cost $200â€“$400, while fixing wiring issues could range from $50â€“$150.

9. Can I fix a B3103 code myself?

If you're comfortable with basic electrical diagnostics, you can check fuses, wiring, and connectors. However, module replacement or advanced diagnostics may require professional help.

10. Does clearing the code solve the problem?

Clearing the code may temporarily remove the warning, but it will return if the underlying issue is not resolved.