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Engine-Codes – Scion – B1901 Scion

B1901 Scion Code - Open in Front Pretensioner Squib Right Circuit

Quick Answer

The B1901 Scion code indicates an open circuit in the Front Pretensioner Squib Right, which is a crucial component of the vehicle's supplemental restraint system (SRS) or airbag system. Common causes include Damaged wiring or connectors in the Front Pretensioner Squib Right circuit, Faulty pretensioner squib, Blown fuse related to the SRS 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
B1901 Scion indicates Open in Front Pretensioner Squib Right Circuit.
Common causes
Common causes include Damaged wiring or connectors in the Front Pretensioner Squib Right circuit, Faulty pretensioner squib, Blown fuse related to the SRS 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 06, 2024
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Code B1901 Scion Description

The B1901 Scion code indicates an open circuit in the Front Pretensioner Squib Right, which is a crucial component of the vehicle's supplemental restraint system (SRS) or airbag system. The pretensioner squib is responsible for tightening the seatbelt in the event of a collision, ensuring that the occupant is securely restrained before the airbag deploys. An open circuit in this component means that the electrical connection is interrupted, preventing the pretensioner from functioning properly.

OBDII Code B1901 Scion - Open in Front Pretensioner Squib Right Circuit
B1901 Scion Code - Open in Front Pretensioner Squib Right Circuit

Common Causes of B1901 Scion

  1. Damaged wiring or connectors in the Front Pretensioner Squib Right circuit
  2. Faulty pretensioner squib
  3. Blown fuse related to the SRS system
  4. Malfunctioning SRS control module
  5. Impact or collision that may have damaged the pretensioner squib or wiring

Symptoms of B1901 Scion

  1. Airbag warning light illuminated on the dashboard
  2. SRS system failure or warning message displayed
  3. Seatbelt not retracting properly
  4. Unusual noises coming from the seatbelt mechanism
  5. Inoperative or malfunctioning airbags during a crash test

How to Fix B1901 Scion

  1. Begin by diagnosing the specific cause of the open circuit in the Front Pretensioner Squib Right using a diagnostic scanner or multimeter.
  2. Inspect the wiring harness and connectors for any visible damage or corrosion, repairing or replacing as necessary.
  3. Test the pretensioner squib for continuity and proper function, replacing it if found to be faulty.
  4. Check and replace any blown fuses related to the SRS system.
  5. Clear the diagnostic trouble codes from the vehicle's computer and test the SRS system to ensure proper functionality.

Cost to Fix B1901 Scion

The cost of repairing an open circuit in the Front Pretensioner Squib Right circuit can vary depending on the specific cause of the issue and the extent of the damage. In general, the repair may range from $200 to $500, including parts and labor. However, it is important to note that diagnostic time and labor rates at auto repair shops can vary significantly based on location, vehicle make and model, and other factors. It is recommended to obtain quotes from multiple shops to get a more accurate estimate for this repair.

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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 B1901 Scion Code

1. What are the common symptoms of OBDII code B1901 in a Scion related to an open in the front pretensioner squib right circuit?

- Common symptoms include the airbag warning light illuminating on the dashboard and potential non-deployment of the front right airbag during a collision.

2. What are some possible causes of OBDII code B1901 in a Scion indicating an open in the front pretensioner squib right circuit?

- Possible causes include a faulty pretensioner squib, damaged wiring or connectors in the circuit, or a malfunctioning airbag control module.

3. How can I diagnose the issue related to OBDII code B1901 in my Scion for an open in the front pretensioner squib right circuit?

- Diagnosing the issue may involve using a scan tool to retrieve the specific fault code, inspecting the wiring and connectors for damage, and testing the front right pretensioner squib for continuity.

4. Is it safe to drive my Scion with OBDII code B1901 indicating an open in the front pretensioner squib right circuit?

- It is not recommended to drive the vehicle with this issue unresolved, as it may compromise the proper functioning of the front right airbag in the event of a collision.

5. Can I repair OBDII code B1901 in my Scion related to an open in the front pretensioner squib right circuit on my own?

- While some DIY enthusiasts may attempt to repair this issue themselves, it is recommended to seek assistance from a qualified mechanic or technician due to the complexity and safety implications of airbag systems.

6. What is the typical cost to repair OBDII code B1901 in a Scion for an open in the front pretensioner squib right circuit?

- The cost of repair can vary depending on the specific cause of the issue, but it may involve replacing the front right pretensioner squib, repairing damaged wiring, or resetting the airbag control module, with costs potentially ranging from a few hundred to over a thousand dollars.

7. Are there any safety precautions I should take when working on the front pretensioner squib circuit in my Scion to address OBDII code B1901?

- Prior to working on the airbag system, it is crucial to disconnect the vehicle's battery and wait for the system to fully discharge to avoid accidental airbag deployment, and to follow proper safety procedures outlined in the vehicle's service manual.

8. How long does it typically take to repair OBDII code B1901 in a Scion associated with an open in the front pretensioner squib right circuit?

- The repair time can vary based on the extent of the issue and the availability of parts, but it may take a few hours to a full day for a skilled technician to diagnose and resolve the open circuit fault.

9. Can a faulty front pretensioner squib cause other OBDII codes to appear in my Scion's diagnostic system?

- Yes, a malfunctioning front pretensioner squib can trigger additional OBDII codes related to the airbag system, such as circuit resistance or deployment issues, which may require further diagnosis and repair.

10. Will resetting the OBDII system clear the B1901 code in my Scion for an open in the front pretensioner squib right circuit?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing the open circuit fault is not addressed and repaired, the code is likely to reappear upon subsequent system checks.

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