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Engine-Codes – Scion – B1850 Scion

B1850 Scion Code - Short In Rear Side Squib Right Circuit

Quick Answer

The B1850 Scion code indicates a short in the rear side squib right circuit. Common causes include Damaged wiring harness in the right rear side of the vehicle, Faulty rear side squib right component, Corrosion or loose connections in the airbag system. 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
B1850 Scion indicates Short In Rear Side Squib Right Circuit.
Common causes
Common causes include Damaged wiring harness in the right rear side of the vehicle, Faulty rear side squib right component, Corrosion or loose connections in the airbag system.
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 16, 2024
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Code B1850 Scion Description

The B1850 Scion code indicates a short in the rear side squib right circuit. In simpler terms, this means that there is an issue with the airbag system in the right rear side of the vehicle. The squib refers to the electrical component that initiates the airbag deployment in case of a collision. A short circuit in this circuit can prevent the airbag from deploying properly, compromising the safety of the vehicle occupants.

OBDII Code B1850 Scion - Short In Rear Side Squib Right Circuit
B1850 Scion Code - Short In Rear Side Squib Right Circuit

Common Causes of B1850 Scion

  1. Damaged wiring harness in the right rear side of the vehicle.
  2. Faulty rear side squib right component.
  3. Corrosion or loose connections in the airbag system.
  4. Impact or collision that damaged the airbag system components.

Symptoms of B1850 Scion

  1. Airbag warning light illuminated on the dashboard.
  2. Inability to turn off the airbag warning light.
  3. Airbag system failure message displayed on the instrument cluster.
  4. Airbag system not deploying in a crash situation.

How to Fix B1850 Scion

  1. Begin by disconnecting the vehicle's battery to ensure safety while working on the airbag system.
  2. Inspect the wiring harness in the right rear side of the vehicle for any signs of damage or corrosion. Repair or replace any damaged wires.
  3. Check the rear side squib right component for proper functionality. Replace the squib if it is found to be faulty.
  4. Clear the diagnostic trouble codes from the vehicle's system using a scan tool.
  5. Reconnect the battery and test the airbag system to ensure that the issue has been resolved.

Cost to Fix B1850 Scion

The cost of repairing a short in the rear side squib right circuit can vary depending on the extent of the damage and the specific components that need to be replaced. On average, the repair costs for this issue can range from $200 to $500, including parts and labor. However, it is important to note that labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. Additionally, the cost of parts and diagnostic time may also impact the overall repair bill. It is recommended to consult with a certified mechanic to get an accurate estimate based on your vehicle's make and model.

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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 B1850 Scion Code

1. What does the OBDII code B1850 mean on a Scion?

B1850 indicates a short circuit in the rear side squib right circuit, which is part of the airbag system.

2. What are the common symptoms of code B1850?

The most common symptoms include the airbag warning light illuminating on the dashboard and the airbag system potentially being disabled.

3. What causes the B1850 code to appear?

This code is typically caused by damaged wiring, a short to ground or power in the circuit, a faulty airbag control module, or a defective passenger-side airbag squib.

4. Can I continue driving with the B1850 code active?

While the vehicle may still be drivable, the airbag system may not function in an accident, posing serious safety risks.

5. How do I diagnose the B1850 code?

Start by inspecting the wiring and connectors in the rear side squib right circuit for damage or shorts, and check the airbag module for faults using a diagnostic scanner.

6. What is a squib in the airbag system?

A squib is a small explosive device in the airbag system that inflates the airbag during a collision.

7. How can I fix the B1850 code?

Repairs may involve replacing damaged wiring, repairing connectors, or replacing the airbag squib or control module if found faulty.

8. How much does it cost to repair a B1850 code?

Repair costs vary but can range from $100 to $1,000 depending on whether minor wiring repairs or major component replacements are needed.

9. Can I reset the B1850 code without fixing the issue?

Resetting the code without addressing the root cause will likely result in the code returning and the airbag system remaining inoperative.

10. Should I attempt to repair the B1850 code myself?

Due to the sensitivity of the airbag system, it's recommended to have a professional mechanic handle repairs to avoid accidental airbag deployment or further issues.

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