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Engine-Codes – Generic – B1943

B1943 Code - Short to Positive in Selectable Force Limiter Squib Right Circuit

Quick Answer

The B1943 code indicates a Short to Positive in the Selectable Force Limiter Squib Right Circuit. Common causes include Damaged wiring in the selectable force limiter squib circuit, Faulty selectable force limiter squib, Malfunctioning airbag control module. 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
B1943 indicates Short to Positive in Selectable Force Limiter Squib Right Circuit.
Common causes
Common causes include Damaged wiring in the selectable force limiter squib circuit, Faulty selectable force limiter squib, Malfunctioning airbag control module.
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 10, 2024
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Code B1943 Description

The B1943 code indicates a Short to Positive in the Selectable Force Limiter Squib Right Circuit. This means that there is a problem with the circuit that controls the selectable force limiter squib on the right side of the vehicle. The selectable force limiter squib is a component of the airbag system that helps manage the deployment force of the airbag based on the severity of a collision. When there is a short to positive in this circuit, it can affect the proper functioning of the airbag system, potentially leading to a failure in deployment during a crash.

OBDII Code B1943 - Short to Positive in Selectable Force Limiter Squib Right Circuit
B1943 Code - Short to Positive in Selectable Force Limiter Squib Right Circuit

Common Causes of B1943

  1. Damaged wiring in the selectable force limiter squib circuit.
  2. Faulty selectable force limiter squib.
  3. Malfunctioning airbag control module.
  4. Corrosion or poor connections in the circuit.
  5. Impact or physical damage to the airbag system components.

Symptoms of B1943

  1. Airbag warning light illuminated on the dashboard.
  2. Inability to activate or adjust the selectable force limiter squib on the right side.
  3. Unusual sounds coming from the airbag system.
  4. Intermittent or erratic airbag deployment.

How to Fix B1943

  1. Begin by conducting a thorough inspection of the selectable force limiter squib circuit, checking for any visible damage or corrosion in the wiring.
  2. Test the selectable force limiter squib to determine if it is functioning correctly or needs replacement.
  3. Use diagnostic tools to scan the airbag control module for any fault codes and address any issues identified.
  4. Repair or replace damaged wiring as necessary, ensuring secure connections.
  5. Clear the diagnostic trouble codes and perform a test drive to verify that the issue has been resolved.

Cost to Fix B1943

The cost of repairing a Short to Positive in the Selectable Force Limiter Squib Right Circuit can vary depending on the extent of the damage and the specific components that need to be replaced. In general, the parts required for this repair, such as a new squib or wiring harness, can range from $200 to $500. Labor costs can add an additional $100 to $300, bringing the total repair bill to around $300 to $800. It's important to note that these are rough estimates, and actual costs may differ based on the vehicle's make and model, as well as the location and labor rates of the auto repair shop. It's recommended to get a detailed quote from a trusted mechanic before proceeding with the repair.

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Code B1943 Information for Specific Makes

  • B1943 Lexus — Short to Positive in Selectable Force Limiter Squib Right Circuit
  • B1943 Scion — Short to Positive in Selectable Force Limiter Squib Right Circuit
  • B1943 Toyota — Short to Positive in Selectable Force Limiter Squib Right Circuit

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 B1943 Code

1. What does the OBDII code B1943 mean?

B1943 indicates a short to positive in the selectable force limiter squib right circuit, typically related to the airbag or seatbelt pretensioner system.

2. What are the common symptoms of the B1943 code?

Symptoms include the airbag warning light staying on, potential malfunction of the seatbelt pretensioner, and in some cases, the airbag system may be disabled.

3. What causes the B1943 code to appear?

Common causes include damaged wiring, corroded or loose electrical connectors, a short circuit in the force limiter squib circuit, or a faulty seatbelt pretensioner.

4. Is the airbag system affected by the B1943 code?

Yes, the airbag system may be partially or fully disabled when this code is active, reducing safety during a collision.

5. How do I diagnose the B1943 code?

Start by inspecting the wiring and connectors in the selectable force limiter squib right circuit for damage or corrosion. Use a multimeter to test for shorts to positive voltage.

6. Can I drive with a B1943 code?

Driving is possible, but it is unsafe since the airbag and seatbelt systems may not function properly in the event of an accident.

7. How is the B1943 code repaired?

Repairs may involve fixing or replacing damaged wiring, cleaning or reconnecting corroded connectors, or replacing a faulty seatbelt pretensioner.

8. How much does it cost to fix the B1943 code?

Repair costs can vary from $100 to $500 or more, depending on whether wiring repairs or component replacements, such as a pretensioner, are needed.

9. Can I clear the B1943 code without repairs?

Clearing the code without addressing the underlying issue will likely result in the code returning, as the fault remains unresolved.

10. Do I need professional help to fix the B1943 code?

While basic inspections can be done at home, resolving the issue often requires specialized tools and knowledge. Consulting a professional technician is recommended.

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