AutoCodes – Toyota – B1940 2018 Toyota RAV4

B1940 2018 Toyota RAV4 Code - Short in Selectable Force Limiter Squib Right Circuit

Quick Answer

The Selectable Force Limiter Squib Right (RH) Circuit consists of the Center Airbag Sensor Assembly and Front Seat Outer Belt Assembly Right (RH). Common causes include Faulty Front Seat Outer Belt Assembly Right (RH) (Selectable Force Limiter Squib Right), Front Seat Outer Belt Assembly Right harness is open or shorted, Front Seat Outer Belt Assembly Right circuit poor electrical connection. 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 2018 Toyota RAV4 indicates Short in Selectable Force Limiter Squib Right Circuit.
Common causes: Common causes include Faulty Front Seat Outer Belt Assembly Right (RH) (Selectable Force Limiter Squib Right), Front Seat Outer Belt Assembly Right harness is open or shorted, Front Seat Outer Belt Assembly Right circuit poor electrical connection.
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 Popularity 389

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Dec 07, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1940 2018 Toyota RAV4 Description

The Selectable Force Limiter Squib Right (RH) Circuit consists of the Center Airbag Sensor Assembly and Front Seat Outer Belt Assembly Right (RH). This circuit instructs the Supplemental Restraint System (SRS) to deploy when the deployment conditions are met. The Diagnostic Trouble Code (DTC) is recorded when a malfunction is detected in the Selectable Force Limiter Squib Right Circuit.

OBDII Code B1940 2018 Toyota RAV4 - Short in Selectable Force Limiter Squib Right Circuit - AutoCodes.com — B1940 2018 Toyota RAV4 Code - Short in Selectable Force Limiter Squib Right Circuit

What does this mean?

What are the Possible Causes of the DTC B1940 2018 Toyota RAV4?

Faulty Front Seat Outer Belt Assembly Right (RH) (Selectable Force Limiter Squib Right)
Front Seat Outer Belt Assembly Right harness is open or shorted
Front Seat Outer Belt Assembly Right circuit poor electrical connection
Faulty Center Airbag Sensor Assembly

How to Fix the DTC B1940 2018 Toyota RAV4?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1940 2018 Toyota RAV4 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B1940 2018 Toyota RAV4 code?

Need more information on how to fix the B1940 2018 Toyota RAV4 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1940 2018 Toyota RAV4 code diagnosed by a professional: Find a repair shop in your area

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 B1940 2018 Toyota RAV4 Code

1. What are the common symptoms of OBDII code B1940 in a 2018 Toyota RAV4?

- Common symptoms include the airbag warning light being illuminated on the dashboard and potential issues with the airbag system's functionality.

2. What does the OBDII code B1940 ("Short in Selectable Force Limiter Squib Right Circuit") indicate in a 2018 Toyota RAV4?

- This code indicates a short circuit in the selectable force limiter squib circuit on the right side of the vehicle's airbag system.

3. What are the possible causes of OBDII code B1940 in a 2018 Toyota RAV4?

- Possible causes include damaged wiring or connectors in the selectable force limiter squib circuit, a faulty squib unit, or issues with the airbag control module.

4. How can I diagnose the source of OBDII code B1940 in my 2018 Toyota RAV4?

- Proper diagnosis involves inspecting the wiring and connectors in the selectable force limiter squib circuit, testing the squib unit for resistance, and checking the airbag control module for faults.

5. Is it safe to drive my 2018 Toyota RAV4 with OBDII code B1940 active?

- It is not recommended to drive the vehicle with this code active, as it indicates a potential issue with the airbag system, which could affect its proper function in the event of an accident.

6. Can I fix OBDII code B1940 in my 2018 Toyota RAV4 by resetting the airbag system?

- Resetting the airbag system may temporarily clear the code, but it will not fix the underlying issue causing the short in the selectable force limiter squib right circuit.

7. How much does it typically cost to repair OBDII code B1940 in a 2018 Toyota RAV4?

- The cost of repair can vary depending on the specific cause of the issue, but it may involve replacing damaged wiring, connectors, or components in the airbag system.

8. Are there any safety concerns associated with OBDII code B1940 in a 2018 Toyota RAV4?

- Yes, there are safety concerns as this code relates to the airbag system, which is a critical safety feature in the vehicle. It's important to address this issue promptly.

9. Can I repair OBDII code B1940 in my 2018 Toyota RAV4 myself, or do I need to take it to a professional mechanic?

- Repairing this code typically requires specialized knowledge and tools related to the airbag system. It is recommended to have a professional mechanic diagnose and repair the issue.

10. How long does it usually take to repair OBDII code B1940 in a 2018 Toyota RAV4?

- The repair time can vary depending on the exact cause of the issue and the availability of parts. In general, it may take a few hours to a full day to address this code properly.