AutoCodes – Scion – B1840 Scion

B1840 Scion Code - Short In Curtain Shield Squib Right 2nd Step Circuit

Quick Answer

The Curtain Shield Squib Right (RH) 2nd Step Circuit consists of the Center Airbag Sensor Assembly and the Curtain Shield Airbag Assembly Right (RH). Common causes include Faulty Curtain Shield Airbag Assembly Right (RH) (Curtain Shield Squib Right 2nd Step), Curtain Shield Airbag Assembly Right harness is open or shorted, Curtain Shield Airbag Assembly Right 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: B1840 Scion indicates Short In Curtain Shield Squib Right 2nd Step Circuit.
Common causes: Common causes include Faulty Curtain Shield Airbag Assembly Right (RH) (Curtain Shield Squib Right 2nd Step), Curtain Shield Airbag Assembly Right harness is open or shorted, Curtain Shield Airbag Assembly Right 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 630

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 07, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1840 Scion Description

The Curtain Shield Squib Right (RH) 2nd Step Circuit consists of the Center Airbag Sensor Assembly and the Curtain Shield Airbag Assembly Right (RH). 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 Curtain Shield Squib Right 2nd Step Circuit.

OBDII Code B1840 Scion - Short In Curtain Shield Squib Right 2nd Step Circuit - AutoCodes.com — B1840 Scion Code - Short In Curtain Shield Squib Right 2nd Step Circuit

What does this mean?

What are the Possible Causes of the DTC B1840 Scion?

Faulty Curtain Shield Airbag Assembly Right (RH) (Curtain Shield Squib Right 2nd Step)
Curtain Shield Airbag Assembly Right harness is open or shorted
Curtain Shield Airbag Assembly Right circuit poor electrical connection
Faulty Center Airbag Sensor Assembly

How to Fix the DTC B1840 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 B1840 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 B1840 Scion code?

Need more information on how to fix the B1840 Scion code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1840 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 B1840 Scion Code

1. What are the common symptoms of OBDII code B1840 in a Scion related to a short in the curtain shield squib right 2nd step circuit?

- Common symptoms may include the airbag warning light illuminating on the dashboard and potential issues with the airbag system functionality.

2. What are some possible causes of OBDII code B1840 in a Scion indicating a short in the curtain shield squib right 2nd step circuit?

- Possible causes can include damaged wiring, a faulty curtain shield squib (airbag detonator), or a malfunctioning airbag control module.

3. How can I diagnose the issue related to OBDII code B1840 in my Scion myself?

- You can start by visually inspecting the wiring harness for any visible damage, checking the curtain shield squib for proper connection, and using an OBDII scanner to read and clear the code.

4. Is it safe to drive my Scion with the OBDII code B1840 present?

- It is not recommended to drive the vehicle with this code present, as it indicates a potential issue with the airbag system, which is crucial for occupant safety in the event of a collision.

5. Can I reset the OBDII code B1840 in my Scion myself, or do I need to take it to a mechanic?

- You can attempt to reset the code yourself using an OBDII scanner, but if the issue persists and the code returns, it is advisable to seek professional help to diagnose and repair the underlying problem.

6. Are there any specific repair tips for fixing OBDII code B1840 indicating a short in the curtain shield squib right 2nd step circuit in a Scion?

- Repair tips may include checking and repairing any damaged wiring, replacing the curtain shield squib if necessary, and ensuring proper connections in the airbag system.

7. How much does it typically cost to repair OBDII code B1840 in a Scion related to a short in the curtain shield squib right 2nd step circuit?

- Repair costs can vary depending on the exact cause of the issue, but it may involve expenses for parts replacement, labor, and diagnostic fees, which could range from a few hundred to over a thousand dollars.

8. Will fixing OBDII code B1840 in my Scion require the airbag system to be reset or reprogrammed?

- Yes, after repairing the issue, the airbag system may need to be reset or reprogrammed to ensure proper functionality and to clear any stored error codes.

9. How long does it typically take to repair OBDII code B1840 in a Scion indicating a short in the curtain shield squib right 2nd step circuit?

- The repair time can vary depending on the extent of the issue, availability of parts, and the expertise of the mechanic, but it may take a few hours to a full day to complete the repair.

10. Can OBDII code B1840 in a Scion be related to other problems in the vehicle's electrical system?

- While the code specifically points to a short in the curtain shield squib right 2nd step circuit, electrical issues in the vehicle can sometimes be interconnected, so it's important to address any underlying electrical problems as well.