AutoCodes – Generic – B3102

B3102 Code - Keyless Entry Data Link Circuit Low

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: B3102 indicates Keyless Entry Data Link Circuit Low.
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 4,501

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 Mar 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3102 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. The Diagnostic Trouble Code (DTC) sets when the keyless entry serial data circuit is shorted to ground.

OBDII Code B3102 - Keyless Entry Data Link Circuit Low - AutoCodes.com — B3102 Code - Keyless Entry Data Link Circuit Low

What does this mean?

What are the Possible Causes of the DTC B3102?

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 B3102?

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 B3102 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.

Need more information about the B3102 code?

Need more information on how to fix the B3102 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B3102 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B3102 Buick — Keyless Entry Data Link Circuit Low
B3102 Cadillac — Keyless Entry Data Link Circuit Low
B3102 Chevrolet — Keyless Entry Data Link Circuit Low
B3102 GMC — Keyless Entry Data Link Circuit Low

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 B3102 Code

1. What are the common symptoms of OBDII code B3102 (Keyless Entry Data Link Circuit Low)?

The common symptoms of B3102 may include malfunctioning keyless entry system, inability to lock or unlock doors remotely, and illuminated warning lights on the dashboard.

2. What are the possible causes of OBDII code B3102?

Possible causes of B3102 include damaged wiring or connectors in the keyless entry system, a faulty key fob, a malfunctioning receiver module, or a problem with the vehicle's body control module.

3. How can I diagnose OBDII code B3102?

Diagnosing B3102 involves checking the wiring and connectors in the keyless entry system for damage, testing the key fob for proper functionality, inspecting the receiver module, and using a diagnostic scan tool to communicate with the body control module.

4. Can a DIY enthusiast repair OBDII code B3102 at home?

DIY enthusiasts with automotive repair experience may be able to repair B3102 at home by carefully inspecting and repairing damaged wiring or connectors, replacing a faulty key fob, or addressing issues with the receiver module. However, complex electronic diagnostics may require professional assistance.

5. Are there any simple troubleshooting steps for OBDII code B3102?

Simple troubleshooting steps for B3102 include checking the key fob battery, ensuring there are no obstructions blocking the signal between the key fob and the receiver module, and verifying that all doors are securely closed.

6. How important is it to address OBDII code B3102 promptly?

It is important to address B3102 promptly to ensure the proper functioning of the keyless entry system, maintain vehicle security, and prevent potential issues with the vehicle's electrical system.

7. Can OBDII code B3102 cause any other problems in the vehicle?

While B3102 specifically relates to the keyless entry data link circuit, unresolved issues with the keyless entry system can potentially lead to related problems such as security concerns, inconvenience in accessing the vehicle, or draining the vehicle's battery due to repeated attempts to lock or unlock the doors.

8. Is it safe to continue driving with OBDII code B3102 present?

It is generally safe to continue driving with OBDII code B3102 present, but it is recommended to address the issue promptly to avoid potential inconvenience or security risks associated with a malfunctioning keyless entry system.

9. Can extreme weather conditions affect OBDII code B3102?

Extreme weather conditions, such as excessive heat or moisture, can potentially impact the keyless entry system and contribute to issues related to B3102. It is advisable to protect the key fob and keyless entry components from such conditions.

10. How can I prevent OBDII code B3102 from occurring in the future?

To prevent B3102 from occurring in the future, it is important to regularly inspect and maintain the keyless entry system, replace key fob batteries as needed, and address any issues promptly to avoid potential wiring or component damage.