AutoCodes – Lexus – B15DA Lexus

B15DA Lexus Code - Rear Console Recognition Disconnected

Quick Answer

The rear control switch and radio receiver assembly are connected by the AVC-LAN communication line. Common causes include Faulty Rear control switch power source circuit, Faulty AVC-LAN circuit between rear cooler switch and multi-display or accessory meter assembly, Faulty Rear control switch. 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: B15DA Lexus indicates Rear Console Recognition Disconnected.
Common causes: Common causes include Faulty Rear control switch power source circuit, Faulty AVC-LAN circuit between rear cooler switch and multi-display or accessory meter assembly, Faulty Rear control switch.
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 47

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 Oct 03, 2025

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code B15DA Lexus Description

The rear control switch and radio receiver assembly are connected by the AVC-LAN communication line. This Diagnostic Trouble Code (DTC) is stored when an AVC-LAN communication error occurs between the rear control switch and radio receiver assembly.

OBDII Code B15DA Lexus - Rear Console Recognition Disconnected - AutoCodes.com — B15DA Lexus Code - Rear Console Recognition Disconnected

What does this mean?

What are the Possible Causes of the DTC B15DA Lexus?

Faulty Rear control switch power source circuit
Faulty AVC-LAN circuit between rear cooler switch and multi-display or accessory meter assembly
Faulty Rear control switch
Faulty Multi-display
Faulty Accessory meter assembly
Harness or connector

How to Fix the DTC B15DA Lexus?

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 B15DA Lexus 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.