AutoCodes – Toyota – B1860 Toyota

B1860 Toyota Code - Short in Driver Side Knee Airbag Squib Circuit

Quick Answer

The Driver Side Knee Airbag Squib Circuit consists of the Center Airbag Sensor Assembly and the Driver Side Knee Airbag Assembly. Common causes include Faulty Driver Side Knee Airbag Assembly (Driver Side Knee Squib), Driver Side Knee Airbag Assembly harness is open or shorted, Driver Side Knee Airbag 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: B1860 Toyota indicates Short in Driver Side Knee Airbag Squib Circuit.
Common causes: Common causes include Faulty Driver Side Knee Airbag Assembly (Driver Side Knee Squib), Driver Side Knee Airbag Assembly harness is open or shorted, Driver Side Knee Airbag 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 13,202

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 Dec 02, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1860 Toyota Description

The Driver Side Knee Airbag Squib Circuit consists of the Center Airbag Sensor Assembly and the Driver Side Knee Airbag Assembly. This circuit instructs the Supplemental Restraint System (SRS) to deploy when deployment conditions are met. The Diagnostic Trouble Code (DTC) is stored when a malfunction is detected in the Driver Side Knee Airbag Squib Circuit.

OBDII Code B1860 Toyota - Short in Driver Side Knee Airbag Squib Circuit - AutoCodes.com — B1860 Toyota Code - Short in Driver Side Knee Airbag Squib Circuit

What does this mean?

What are the Possible Causes of the DTC B1860 Toyota?

Faulty Driver Side Knee Airbag Assembly (Driver Side Knee Squib)
Driver Side Knee Airbag Assembly harness is open or shorted
Driver Side Knee Airbag Assembly circuit poor electrical connection
Faulty Center Airbag Sensor Assembly

How to Fix the DTC B1860 Toyota?

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 B1860 Toyota 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 B1860 Toyota code?

Need more information on how to fix the B1860 Toyota code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1860 Toyota code diagnosed by a professional: Find a repair shop in your area

Information for Specific Toyota Models

B1860 2013 Toyota RAV4 — Short in Driver Side Knee Airbag Squib Circuit
B1860 2014 Toyota RAV4 — Short in Driver Side Knee Airbag Squib Circuit
B1860 2015 Toyota RAV4 — Short in Driver Side Knee Airbag Squib Circuit
B1860 2016 Toyota RAV4 — Short in Driver Side Knee Airbag Squib Circuit
B1860 2017 Toyota RAV4 — Short in Driver Side Knee Airbag Squib Circuit
B1860 2018 Toyota RAV4 — Short in Driver Side Knee Airbag Squib Circuit

Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.

Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

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 B1860 Toyota Code

1. What are the common symptoms of OBDII code B1860 (Short in Driver Side Knee Airbag Squib Circuit)?

The common symptoms include the airbag warning light staying illuminated on the dashboard and a potential loss of functionality of the driver side knee airbag.

2. What are the possible causes of OBDII code B1860 in a Toyota?

The code B1860 typically indicates a short circuit in the driver side knee airbag squib circuit, which could be caused by damaged wiring, a faulty airbag squib, or a problem with the airbag control module.

3. How serious is OBDII code B1860 in a Toyota?

Code B1860 should be taken seriously, as it indicates a potential issue with the driver side knee airbag system. It is crucial to address this problem promptly to ensure the proper functioning of the airbag in case of an accident.

4. Can I continue driving my Toyota with OBDII code B1860 present?

It is not recommended to drive your Toyota with OBDII code B1860 present, as it signifies a malfunction in the driver side knee airbag system. Continuing to drive the vehicle with this issue unresolved could compromise your safety in the event of a collision.

5. How can I diagnose and repair OBDII code B1860 in my Toyota?

Diagnosing and repairing OBDII code B1860 usually involves inspecting the wiring and connectors in the driver side knee airbag circuit, testing the airbag squib, and checking the airbag control module for faults. It is recommended to consult a professional mechanic for an accurate diagnosis and proper repair.

6. Is OBDII code B1860 a common issue in Toyota vehicles?

While the occurrence of OBDII code B1860 may vary, it has been reported as a relatively common issue in Toyota vehicles, particularly in models equipped with a driver side knee airbag system.

7. Can I reset OBDII code B1860 in my Toyota without fixing the underlying issue?

Resetting the OBDII code B1860 without addressing the underlying problem, such as a short circuit in the driver side knee airbag squib circuit, is not recommended. The code will likely reappear until the root cause of the issue is resolved.

8. How much does it typically cost to repair OBDII code B1860 in a Toyota?

The cost of repairing OBDII code B1860 in a Toyota can vary depending on the extent of the damage and the specific components that need to be replaced. It is advisable to obtain a diagnostic and repair estimate from a qualified mechanic.

9. Is it possible to prevent OBDII code B1860 from occurring in my Toyota?

While some causes of OBDII code B1860 may be unavoidable, regular inspection and maintenance of the airbag system, including checking for damaged wiring and connectors, can help prevent this issue from arising in your Toyota.

10. Can I fix OBDII code B1860 in my Toyota by myself?

Repairing OBDII code B1860 in a Toyota may require specialized knowledge and tools, especially when dealing with the airbag system. It is recommended to seek assistance from a professional mechanic to ensure the proper diagnosis and repair of the issue.