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

Quick Answer

The B1943 diagnostic trouble code for Toyota vehicles indicates a "Short to Positive in Selectable Force Limiter Squib Right Circuit." This code specifically refers to an issue with the selectable force limiter squib in the right circuit of the vehicle's supplemental restraint system (SRS), commonly known as the airbag system. Common causes include Damaged wiring or connectors in the selectable force limiter squib circuit, Faulty selectable force limiter squib, Corrosion in the connectors related to the squib. 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 Toyota indicates Short to Positive in Selectable Force Limiter Squib Right Circuit.

Common causes

Common causes include Damaged wiring or connectors in the selectable force limiter squib circuit, Faulty selectable force limiter squib, Corrosion in the connectors related to the squib.

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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Common Causes of B1943 Toyota

Symptoms of B1943 Toyota

How to Fix B1943 Toyota

Cost to Fix B1943 Toyota

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Information for Specific Toyota Models

• B1943 2013 Toyota RAV4 — Short to Positive in Selectable Force Limiter Squib Right Circuit
• B1943 2014 Toyota RAV4 — Short to Positive in Selectable Force Limiter Squib Right Circuit
• B1943 2015 Toyota RAV4 — Short to Positive in Selectable Force Limiter Squib Right Circuit
• B1943 2016 Toyota RAV4 — Short to Positive in Selectable Force Limiter Squib Right Circuit
• B1943 2017 Toyota RAV4 — Short to Positive in Selectable Force Limiter Squib Right Circuit
• B1943 2018 Toyota RAV4 — 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 Toyota Code

1. What does OBDII code B1943 mean in a Toyota?

Code B1943 indicates a "Short to Positive in Selectable Force Limiter Squib Right Circuit," which is related to the airbag system and involves a potential electrical fault in the right-side force limiter squib.

2. What are the common symptoms of code B1943 in a Toyota?

The most common symptom is the airbag warning light illuminating on the dashboard, indicating a potential fault in the airbag system.

3. What causes the B1943 code to be triggered?

This code is typically caused by a short circuit to positive voltage in the wiring, a faulty force limiter squib, damaged connectors, or a malfunction in the airbag control module.

4. Is it safe to drive with code B1943 active?

Driving with code B1943 active is not recommended, as it indicates a fault in the airbag system, which may not deploy properly in the event of a collision.

5. How can I diagnose code B1943 in my Toyota?

To diagnose the issue, visually inspect the wiring and connectors for damage or corrosion, use a multimeter to check for shorts to positive voltage, and scan the airbag system with an OBDII scanner designed for Toyota vehicles.

6. What repairs are needed to fix code B1943?

Repairs may include replacing damaged wiring or connectors, repairing a short circuit, or replacing the faulty force limiter squib or airbag control module.

7. Can I clear the B1943 code without repairing the issue?

While you can clear the code using an OBDII scanner, the airbag warning light will likely return if the root cause is not addressed, and the airbag system may remain non-functional.

8. How much does it cost to repair code B1943 in a Toyota?

The cost depends on the specific issue, but repairs may range from $100 for wiring fixes to over $1,000 if the airbag control module or squib needs replacement.

9. Can a faulty clock spring cause code B1943?

While a faulty clock spring typically affects steering wheel-mounted controls or the driver’s airbag, it’s unlikely to cause code B1943, which pertains to the selectable force limiter squib on the passenger side.

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

Due to the complexity and safety risks of working with the airbag system, it’s highly recommended to seek professional assistance to ensure proper diagnosis and repair.