Engine-Codes.com
Engine-Codes – Toyota – B1860 Toyota

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

Quick Answer

The B1860 diagnostic trouble code for Toyota vehicles indicates a short in the driver side knee airbag squib circuit. Common causes include Short circuit in the wiring harness, Faulty squib (igniter) in the airbag module, Blown fuse in the airbag circuit. 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 Short circuit in the wiring harness, Faulty squib (igniter) in the airbag module, Blown fuse in the airbag circuit.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 06, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code B1860 Toyota Description

The B1860 diagnostic trouble code for Toyota vehicles indicates a short in the driver side knee airbag squib circuit. This means that there is an issue with the electrical circuit that controls the deployment of the driver side knee airbag in the event of a collision. The knee airbag is an important safety feature that helps protect the driver's legs and lower body in a crash, so it is crucial to address this issue promptly.

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

Common Causes of B1860 Toyota

  1. Short circuit in the wiring harness.
  2. Faulty squib (igniter) in the airbag module.
  3. Blown fuse in the airbag circuit.
  4. Issue with the airbag control module.

Symptoms of B1860 Toyota

  1. Airbag warning light illuminated on the dashboard.
  2. Driver side knee airbag may not deploy in a collision.
  3. Fault code B1860 stored in the vehicle's computer.
  4. Loss of power to the driver side knee airbag system.

How to Fix B1860 Toyota

  1. Begin by diagnosing the exact cause of the issue using a diagnostic scan tool to retrieve the trouble codes and pinpoint the source of the problem.
  2. Inspect the wiring harness for any signs of damage or a short circuit. Repair or replace any damaged wiring as needed.
  3. Check the airbag squib (igniter) in the knee airbag module for proper functioning. Replace if faulty.
  4. Inspect and replace any blown fuses in the airbag circuit.
  5. If the issue persists, further inspection of the airbag control module may be necessary. Replace if deemed faulty.

Cost to Fix B1860 Toyota

The cost of repairing a short in the driver side knee airbag squib circuit can vary depending on the specific cause of the issue and the labor rates in your area. On average, this repair can range from $200 to $500, including parts and labor. Keep in mind that diagnostic time and labor rates at auto repair shops can vary, so it's advisable to get quotes from multiple shops to ensure a fair price.

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

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.

Discuss the causes and fixes for B1860 Toyota OBDII Code

Submit a New Comment

Code B1860 Toyota comments

No comments found for this page.