AutoCodes – Generic – B3103

B3103 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 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 1,775

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

What does this mean?

What are the Possible Causes of the DTC B3103?

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?

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 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 B3103 code?

Need more information on how to fix the B3103 code? Get Access to Factory Service Manuals

Need Help with the Code?

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

Information for Specific Makes

B3103 Buick — Keyless Entry Data Link Circuit High
B3103 Cadillac — Keyless Entry Data Link Circuit High
B3103 Chevrolet — Keyless Entry Data Link Circuit High
B3103 GMC — Keyless Entry Data Link Circuit High

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 Code

1. What are the common symptoms of OBDII code B3103 (Keyless Entry Data Link Circuit High)?

- Common symptoms include malfunctioning keyless entry system, non-responsive key fobs, and failure of remote door lock/unlock functions.

2. What are the possible causes of OBDII code B3103?

- The code B3103 can be caused by issues such as damaged wiring, faulty keyless entry module, a problem with the data link circuit, or a malfunctioning key fob.

3. How can I diagnose OBDII code B3103 related to the Keyless Entry Data Link Circuit High?

- Diagnose the code by inspecting the keyless entry system wiring, checking the key fobs for proper functioning, and using a scan tool to identify the specific fault.

4. Can a DIY enthusiast repair OBDII code B3103 at home?

- Yes, DIY repairs for code B3103 may involve checking and repairing damaged wiring, replacing a faulty keyless entry module, or reprogramming key fobs.

5. Is it safe to continue driving with OBDII code B3103 triggered?

- It is generally safe to drive with the code B3103 triggered, but it is recommended to address the issue promptly to restore the functionality of the keyless entry system.

6. How can I reset OBDII code B3103 after making repairs?

- After making necessary repairs, you can reset the code B3103 using an OBDII scan tool or by disconnecting the car battery for a few minutes to clear the fault code.

7. Are there any common mistakes to avoid when troubleshooting OBDII code B3103?

- Common mistakes to avoid include overlooking loose connections, neglecting to check key fob batteries, and misdiagnosing the issue as a keyless entry system problem.

8. Can extreme weather conditions cause OBDII code B3103 to trigger?

- Yes, extreme weather conditions like excessive heat or moisture can potentially cause electrical issues that trigger OBDII code B3103 related to the Keyless Entry Data Link Circuit High.

9. Is it necessary to visit a dealership for repairs related to OBDII code B3103?

- While a dealership can provide specialized expertise, independent auto repair shops or DIY enthusiasts can often effectively diagnose and repair OBDII code B3103 issues.

10. How can I prevent OBDII code B3103 from recurring in the future?

- To prevent the recurrence of OBDII code B3103, regularly inspect the keyless entry system components, maintain proper wiring connections, and replace key fob batteries as needed.