B1940 Scion Code - Short in Selectable Force Limiter Squib Right Circuit
Quick Answer
The B1940 diagnostic trouble code for Scion vehicles indicates a short in the selectable force limiter squib right circuit. Common causes include Faulty selectable force limiter squib, Short circuit in the wiring harness, Blown fuse related to 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
- B1940 Scion indicates Short in Selectable Force Limiter Squib Right Circuit.
- Common causes
- Common causes include Faulty selectable force limiter squib, Short circuit in the wiring harness, Blown fuse related to 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.
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Code B1940 Scion Description
The B1940 diagnostic trouble code for Scion vehicles indicates a short in the selectable force limiter squib right circuit. This circuit is part of the vehicle's supplemental restraint system (SRS), specifically the airbag system. The selectable force limiter squib is a component that helps control the deployment force of the airbag in the event of a collision. A short in this circuit can prevent the airbag from deploying properly or at all, compromising the safety of the vehicle occupants.
Common Causes of B1940 Scion
- Faulty selectable force limiter squib
- Short circuit in the wiring harness
- Blown fuse related to the airbag system
- Malfunctioning airbag control module
- Impact or damage to the airbag system components
Symptoms of B1940 Scion
- Airbag warning light illuminated on the dashboard
- SRS warning message displayed on the instrument cluster
- Airbag system failure to pass self-test during vehicle startup
- Airbag system not functioning properly during a collision
How to Fix B1940 Scion
- Diagnose the specific cause of the short in the selectable force limiter squib right circuit using a scan tool and multimeter.
- Inspect the wiring harness for any visible damage or signs of a short circuit.
- Test the selectable force limiter squib for proper functionality and replace if necessary.
- Check and replace any blown fuses related to the airbag system.
- Reset the airbag control module and clear the diagnostic trouble code from the vehicle's memory.
Cost to Fix B1940 Scion
The cost of repairing a short in the selectable force limiter squib right circuit can vary depending on the specific cause of the issue and the labor rates in your area. Generally, the parts for this repair can range from $100 to $300, while the labor costs can be between $150 and $400. Overall, you can expect the total repair cost to be in the range of $250 to $700. It's recommended to consult with a trusted mechanic or dealership to get an accurate estimate based on your vehicle's make and model. Labor rates at auto repair shops can vary, so it's advisable to inquire about the specific rates in your area.
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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.
Frequently Asked Questions about B1940 Scion Code
What are the common symptoms of OBDII code B1940 in a Scion related to a short in the Selectable Force Limiter Squib Right circuit?
Common symptoms include the airbag warning light being illuminated on the dashboard, the airbag system being disabled, and potential issues with the airbag deploying in case of an accident.
What are some possible causes of OBDII code B1940 in a Scion indicating a short in the Selectable Force Limiter Squib Right circuit?
Potential causes include damaged wiring or connectors in the Selectable Force Limiter Squib Right circuit, a faulty squib (airbag explosive charge), or a malfunctioning airbag control module.
How can I diagnose OBDII code B1940 in a Scion for a short in the Selectable Force Limiter Squib Right circuit?
To diagnose this issue, you can use an OBDII scanner to read the code, inspect the wiring and connectors in the Selectable Force Limiter Squib Right circuit for damage, and perform continuity tests to pinpoint the location of the short.
What are the repair options for fixing OBDII code B1940 in a Scion due to a short in the Selectable Force Limiter Squib Right circuit?
Repair options may include repairing or replacing damaged wiring or connectors, replacing the squib if faulty, or resetting the airbag control module after the issue has been resolved.
Is it safe to drive a Scion with OBDII code B1940 indicating a short in the Selectable Force Limiter Squib Right circuit?
It is not recommended to drive the vehicle with this issue as the airbag system may not function properly in case of an accident, potentially putting the driver and passengers at risk.
Can I reset the OBDII code B1940 in a Scion myself after fixing the short in the Selectable Force Limiter Squib Right circuit?
Once the underlying issue causing the code has been addressed, you can reset the code using an OBDII scanner or by disconnecting the car battery for a few minutes to clear the system's memory.
Do I need specialized tools to repair OBDII code B1940 in a Scion related to a short in the Selectable Force Limiter Squib Right circuit?
While basic tools like a multimeter and OBDII scanner can be helpful for diagnosis, specialized tools may be required for accessing and repairing components within the airbag system. It is recommended to consult a professional if you are unsure.
Are there any safety precautions to consider when working on OBDII code B1940 in a Scion associated with a short in the Selectable Force Limiter Squib Right circuit?
When working on the airbag system, always disconnect the car battery and wait at least 10 minutes before starting any repairs to prevent accidental airbag deployment. Additionally, follow proper safety procedures outlined in the vehicle's service manual.
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