AutoCodes – Toyota – B1903 2018 Toyota RAV4

B1903 2018 Toyota RAV4 Code - Short to Positive in Front Pretensioner Squib Right Circuit

Quick Answer

The Front Pretensioner 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) (Front Pretensioner 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: B1903 2018 Toyota RAV4 indicates Short to Positive in Front Pretensioner Squib Right Circuit.
Common causes: Common causes include Faulty Front Seat Outer Belt Assembly Right (RH) (Front Pretensioner 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 312

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 03, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B1903 2018 Toyota RAV4 Description

The Front Pretensioner 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 Front Pretensioner Squib Right Circuit.

OBDII Code B1903 2018 Toyota RAV4 - Short to Positive in Front Pretensioner Squib Right Circuit - AutoCodes.com — B1903 2018 Toyota RAV4 Code - Short to Positive in Front Pretensioner Squib Right Circuit

What does this mean?

What are the Possible Causes of the DTC B1903 2018 Toyota RAV4?

Faulty Front Seat Outer Belt Assembly Right (RH) (Front Pretensioner 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 B1903 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 B1903 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 B1903 2018 Toyota RAV4 code?

Need more information on how to fix the B1903 2018 Toyota RAV4 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1903 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 B1903 2018 Toyota RAV4 Code

1. What are the common symptoms of OBDII code B1903 in a 2018 Toyota RAV4?

- Common symptoms include the airbag warning light staying on, non-deployment of the front right seatbelt pretensioner in a collision, and potential issues with the airbag system.

2. What does the OBDII code B1903 "Short to Positive in Front Pretensioner Squib Right Circuit" mean for a 2018 Toyota RAV4?

- This code indicates a short circuit to the positive side in the front pretensioner squib right circuit of the seatbelt system, which can affect the proper functioning of the airbag system.

3. What are the possible causes of OBDII code B1903 in a 2018 Toyota RAV4?

- Potential causes include damaged wiring or connectors in the front right pretensioner circuit, a faulty pretensioner squib, or issues with the airbag control module.

4. How can I diagnose the OBDII code B1903 in my 2018 Toyota RAV4?

- Diagnosis involves inspecting the wiring and connectors in the front right pretensioner circuit, testing the pretensioner squib, and checking the airbag control module for any faults.

5. Can I drive my 2018 Toyota RAV4 with the OBDII code B1903?

- It is not recommended to drive the vehicle with this code present, as it indicates a potential issue with the seatbelt pretensioner system, which is crucial for occupant safety in the event of a collision.

6. How can I repair OBDII code B1903 in my 2018 Toyota RAV4?

- Repairing this code typically involves fixing any damaged wiring or connectors in the front right pretensioner circuit, replacing the faulty pretensioner squib if necessary, and resetting the airbag system.

7. Is it safe to reset the OBDII code B1903 in a 2018 Toyota RAV4 without fixing the underlying issue?

- It is not recommended to simply reset the code without addressing the root cause, as the safety systems may not function properly in the event of a collision.

8. Can I repair OBDII code B1903 in my 2018 Toyota RAV4 myself?

- While some basic troubleshooting like checking wiring and connectors can be done by DIY enthusiasts, it is recommended to have a professional technician diagnose and repair this code due to the safety implications.

9. How much does it cost to fix OBDII code B1903 in a 2018 Toyota RAV4?

- The cost of fixing this code can vary depending on the specific issue, but it may involve repairs to the wiring, replacement of the pretensioner squib, or addressing faults in the airbag control module.

10. How can I prevent OBDII code B1903 from recurring in my 2018 Toyota RAV4?

- To prevent the recurrence of this code, ensure that the seatbelt pretensioner system is properly maintained, avoid any physical damage to the wiring, and address any airbag system issues promptly.