B1902 Toyota Code - Short to Ground in Front Pretensioner Squib Right Circuit

Quick Answer

The B1902 diagnostic trouble code for Toyota vehicles indicates a short to ground in the Front Pretensioner Squib Right circuit. Common causes include Damaged wiring or connectors in the Front Pretensioner Squib Right circuit, Corrosion or rust affecting the electrical connections in the circuit, Faulty pretensioner squib unit. 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

B1902 Toyota indicates Short to Ground in Front Pretensioner Squib Right Circuit.

Common causes

Common causes include Damaged wiring or connectors in the Front Pretensioner Squib Right circuit, Corrosion or rust affecting the electrical connections in the circuit, Faulty pretensioner squib unit.

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.

• Description
• Common Causes
• Symptoms
• How To Fix
• Cost to Fix
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Common Causes of B1902 Toyota

Symptoms of B1902 Toyota

How to Fix B1902 Toyota

Cost to Fix B1902 Toyota

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Information for Specific Toyota Models

• B1902 2013 Toyota RAV4 — Short to Ground in Front Pretensioner Squib Right Circuit
• B1902 2014 Toyota RAV4 — Short to Ground in Front Pretensioner Squib Right Circuit
• B1902 2015 Toyota RAV4 — Short to Ground in Front Pretensioner Squib Right Circuit
• B1902 2016 Toyota RAV4 — Short to Ground in Front Pretensioner Squib Right Circuit
• B1902 2017 Toyota RAV4 — Short to Ground in Front Pretensioner Squib Right Circuit
• B1902 2018 Toyota RAV4 — Short to Ground in Front Pretensioner 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 B1902 Toyota Code

1. What are the common symptoms of OBDII code B1902 in a Toyota related to the Front Pretensioner Squib Right Circuit?

- Common symptoms include the airbag warning light staying illuminated on the dashboard and possible issues with the right front seatbelt pretensioner system.

2. What does the OBDII code B1902 "Short to Ground in Front Pretensioner Squib Right Circuit" mean in a Toyota?

- This code indicates a potential short circuit to ground in the front pretensioner squib right circuit of the airbag system.

3. What are the possible causes of OBDII code B1902 in a Toyota?

- Causes can include damaged wiring in the front pretensioner squib right circuit, a faulty pretensioner squib, or a problem with the airbag control module.

4. How can I diagnose the OBDII code B1902 in a Toyota?

- Diagnosis typically involves using a diagnostic scan tool to retrieve the specific fault code, inspecting the wiring and connections in the front pretensioner squib right circuit, and testing the components for proper functionality.

5. Are there any safety concerns associated with OBDII code B1902 in a Toyota?

- Yes, it is important to address this code promptly as it may indicate a potential issue with the airbag system, which could affect its ability to deploy properly in the event of a collision.

6. Can I continue driving my Toyota with OBDII code B1902 present?

- It is not recommended to continue driving the vehicle with this code present, as it may compromise the effectiveness of the airbag system in the event of an accident.

7. How can I repair OBDII code B1902 in a Toyota?

- Repair may involve repairing or replacing damaged wiring, replacing the pretensioner squib if faulty, or addressing any issues with the airbag control module as needed.

8. Is it possible to reset the OBDII code B1902 in a Toyota without fixing the underlying issue?

- While you can clear the code temporarily, it will likely reappear if the root cause of the problem is not addressed.

9. Can I fix OBDII code B1902 in a Toyota by myself, or do I need professional help?

- Depending on your level of automotive repair experience, you may be able to address this code yourself by following the diagnostic and repair procedures outlined in the vehicle's service manual.

10. Are there any recalls or service bulletins related to OBDII code B1902 in Toyota vehicles?

- It is recommended to check with a Toyota dealership or the manufacturer's website to see if there are any recalls or service bulletins related to this specific OBDII code in your vehicle.