AutoCodes – Scion – B1857 Scion

B1857 Scion Code - Short To Ground In Rear Side Squib Left Circuit

Quick Answer

The Rear Side Squib Left (LH) Circuit consists of the Center Airbag Sensor Assembly and the Rear Seat Side Airbag Assembly Left (LH). Common causes include Faulty Rear Seat Side Airbag Assembly Left (LH) (Rear Side Squib Left Circuit), Rear Seat Side Airbag Assembly Left harness is open or shorted, Rear Seat Side Airbag Assembly Left 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: B1857 Scion indicates Short To Ground In Rear Side Squib Left Circuit.
Common causes: Common causes include Faulty Rear Seat Side Airbag Assembly Left (LH) (Rear Side Squib Left Circuit), Rear Seat Side Airbag Assembly Left harness is open or shorted, Rear Seat Side Airbag Assembly Left 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 773

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 Jul 08, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1857 Scion Description

The Rear Side Squib Left (LH) Circuit consists of the Center Airbag Sensor Assembly and the Rear Seat Side Airbag Assembly Left (LH). The 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 Rear Side Squib Left Circuit.

OBDII Code B1857 Scion - Short To Ground In Rear Side Squib Left Circuit - AutoCodes.com — B1857 Scion Code - Short To Ground In Rear Side Squib Left Circuit

What does this mean?

What are the Possible Causes of the DTC B1857 Scion?

Faulty Rear Seat Side Airbag Assembly Left (LH) (Rear Side Squib Left Circuit)
Rear Seat Side Airbag Assembly Left harness is open or shorted
Rear Seat Side Airbag Assembly Left circuit poor electrical connection
Faulty Center Airbag Sensor Assembly

How to Fix the DTC B1857 Scion?

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 B1857 Scion 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 B1857 Scion code?

Need more information on how to fix the B1857 Scion code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1857 Scion code diagnosed by a professional: Find a repair shop in your area

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 B1857 Scion Code

1. What are the common symptoms of OBDII code B1857 in a Scion related to a short to ground in the rear side squib left circuit?

- Common symptoms include the airbag warning light being illuminated on the dashboard and potential issues with the functionality of the airbag system.

2. What could cause the OBDII code B1857 in a Scion indicating a short to ground in the rear side squib left circuit?

- Possible causes could be damaged wiring, a faulty airbag squib, or a poor electrical connection in the rear side squib left circuit.

3. How can I diagnose the OBDII code B1857 in a Scion related to a short to ground in the rear side squib left circuit?

- Diagnosis typically involves using a scan tool to retrieve the fault code, inspecting the wiring and connections in the rear side squib left circuit, and testing the airbag squib for proper resistance.

4. Is it safe to drive my Scion with the OBDII code B1857 indicating a short to ground in the rear side squib left circuit?

- It is not recommended to drive the vehicle with this fault code present, as it could compromise the effectiveness of the airbag system in the event of a collision.

5. What are some repair tips for fixing the OBDII code B1857 in a Scion related to a short to ground in the rear side squib left circuit?

- Repair tips may include repairing or replacing damaged wiring, ensuring proper connections in the circuit, and replacing the faulty airbag squib if necessary.

6. Can I reset the OBDII code B1857 in a Scion indicating a short to ground in the rear side squib left circuit myself?

- While you can clear the fault code with a scan tool, it is important to address the underlying issue causing the code to prevent it from reoccurring.

7. How much does it typically cost to repair the OBDII code B1857 in a Scion related to a short to ground in the rear side squib left circuit?

- Repair costs can vary depending on the specific cause of the issue, but it is recommended to consult a professional mechanic for an accurate diagnosis and repair estimate.

8. Are there any safety concerns associated with the OBDII code B1857 in a Scion indicating a short to ground in the rear side squib left circuit?

- Yes, there are safety concerns, as the fault code relates to the airbag system, which is a critical safety feature in a vehicle.

9. How can I prevent the OBDII code B1857 from appearing in my Scion due to a short to ground in the rear side squib left circuit?

- Regularly inspecting the airbag system, ensuring proper wiring connections, and addressing any warning lights promptly can help prevent this issue.

10. Is the repair for the OBDII code B1857 in a Scion related to a short to ground in the rear side squib left circuit covered by warranty?

- Warranty coverage for this repair would depend on factors such as the age of the vehicle, the specific warranty terms, and whether the issue is determined to be a manufacturing defect.