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Engine-Codes – Scion – B1920 Scion

B1920 Scion Code - Short In Rear Pretensioner Squib RH Circuit

Quick Answer

The B1920 Scion code indicates a short in the rear pretensioner squib RH circuit. Common causes include Faulty rear pretensioner squib RH, Wiring issues or short circuits in the rear pretensioner circuit, Corrosion or damage to the connectors in the 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
B1920 Scion indicates Short In Rear Pretensioner Squib RH Circuit.
Common causes
Common causes include Faulty rear pretensioner squib RH, Wiring issues or short circuits in the rear pretensioner circuit, Corrosion or damage to the connectors in the 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 17, 2024
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Code B1920 Scion Description

The B1920 Scion code indicates a short in the rear pretensioner squib RH circuit. In simpler terms, this means that there is an issue with the right-hand side rear seatbelt pretensioner system in the vehicle. The pretensioner is a safety feature that tightens the seatbelt in the event of a collision, reducing the forward movement of the occupant and minimizing the risk of injury. A short in this circuit can prevent the pretensioner from functioning properly, potentially compromising the safety of the vehicle's occupants.

OBDII Code B1920 Scion - Short In Rear Pretensioner Squib RH Circuit
B1920 Scion Code - Short In Rear Pretensioner Squib RH Circuit

Common Causes of B1920 Scion

  1. Faulty rear pretensioner squib RH.
  2. Wiring issues or short circuits in the rear pretensioner circuit.
  3. Corrosion or damage to the connectors in the circuit.
  4. Impact or collision that damaged the seatbelt pretensioner system.
  5. Faulty airbag control module.

Symptoms of B1920 Scion

  1. Airbag warning light illuminated on the dashboard.
  2. Seatbelt pretensioner system not engaging properly.
  3. Audible warning chime when starting the vehicle.
  4. Inability to reset the airbag warning light even after attempting to clear the code.

How to Fix B1920 Scion

  1. Begin by diagnosing the specific cause of the issue using a diagnostic scanner to retrieve the trouble codes and pinpoint the source of the problem.
  2. Inspect the wiring and connectors in the rear pretensioner squib RH circuit for any damage, corrosion, or loose connections. Repair or replace any faulty components as needed.
  3. Test the rear pretensioner squib RH to ensure it is functioning correctly. Replace the pretensioner if it is found to be faulty.
  4. Clear the diagnostic trouble codes from the vehicle's system using the diagnostic scanner.
  5. Test the system to ensure that the issue has been resolved and that the airbag warning light no longer illuminates.

Cost to Fix B1920 Scion

The cost of repairing a short in the rear pretensioner squib RH circuit can vary depending on the specific cause of the issue and the cost of parts and labor. In general, the cost of parts for this repair can range from $100 to $300, while labor costs can range from $150 to $300. Overall, the total repair cost for this issue is typically between $250 and $600. It is important to note that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and the rates charged by the auto repair shop. It is recommended to obtain quotes from local repair 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 B1920 Scion Code

1. What are the common symptoms of OBDII code B1920 in a Scion related to a short in the rear pretensioner squib RH circuit?

The common symptoms include the airbag warning light illuminating on the dashboard and potential issues with the deployment of the rear right-hand side seatbelt pretensioner in the event of a collision.

2. What are the possible causes of OBDII code B1920 in a Scion indicating a short in the rear pretensioner squib RH circuit?

Possible causes can include damaged wiring or connectors in the rear right-hand side seatbelt pretensioner circuit, a faulty pretensioner squib module, or a malfunctioning airbag control module.

3. How can I diagnose the OBDII code B1920 in my Scion for a short in the rear pretensioner squib RH circuit?

Diagnosis typically involves using a diagnostic scanner to retrieve the specific fault code, conducting a visual inspection of the wiring and connectors in the rear right-hand side seatbelt pretensioner circuit, and testing the components for proper functionality.

4. Is it safe to drive my Scion with OBDII code B1920 indicating a short in the rear pretensioner squib RH circuit?

It is not recommended to drive the vehicle with this code present, as it can compromise the proper functioning of the rear right-hand side seatbelt pretensioner in the event of a collision.

5. Can I reset the OBDII code B1920 in my Scion related to a short in the rear pretensioner squib RH circuit?

Resetting the code may temporarily clear the warning light, but it will likely reappear until the underlying issue causing the short in the rear pretensioner squib RH circuit is properly diagnosed and repaired.

6. How can I repair OBDII code B1920 in my Scion for a short in the rear pretensioner squib RH circuit?

Repair options may include repairing or replacing damaged wiring or connectors, replacing the rear right-hand side seatbelt pretensioner squib module, or addressing any issues with the airbag control module.

7. Will fixing OBDII code B1920 in my Scion for a short in the rear pretensioner squib RH circuit be costly?

The cost of repair can vary depending on the exact cause of the issue and whether any components need to be replaced. It is recommended to consult with a professional mechanic for an accurate estimate.

8. Are there any safety concerns associated with OBDII code B1920 in a Scion indicating a short in the rear pretensioner squib RH circuit?

Yes, unresolved issues related to the rear right-hand side seatbelt pretensioner can compromise the safety of the vehicle occupants in the event of a collision, as the seatbelt may not function as intended.

9. Can a DIY enthusiast without specialized skills repair OBDII code B1920 in a Scion for a short in the rear pretensioner squib RH circuit?

Due to the safety implications and complexity of airbag systems, it is recommended to seek professional assistance for diagnosing and repairing issues related to airbag fault codes like B1920.

10. How often should I have the airbag system in my Scion inspected to prevent issues like OBDII code B1920 for a short in the rear pretensioner squib RH circuit?

Regular maintenance and inspection of the airbag system, including the seatbelt pretensioners, should be conducted according to the manufacturer's recommended schedule to help prevent issues and ensure proper functionality in case of an accident.

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