AutoCodes – Toyota – B1816 Toyota

B1816 Toyota Code - Open In Front Passenger Side Squib 2nd Step Circuit

Quick Answer

The Front Passenger Side Squib 2nd Step Circuit consists of the Center Airbag Sensor Assembly and the Front Passenger Airbag Assembly. Common causes include Instrument panel wire, Faulty Front Passenger Airbag Assembly (Front Passenger Side Squib 2nd Step), Front Passenger Airbag Assembly harness is open or shorted. 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: B1816 Toyota indicates Open In Front Passenger Side Squib 2nd Step Circuit.
Common causes: Common causes include Instrument panel wire, Faulty Front Passenger Airbag Assembly (Front Passenger Side Squib 2nd Step), Front Passenger Airbag Assembly harness is open or shorted.
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 14,281

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 Nov 27, 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 B1816 Toyota Description

The Front Passenger Side Squib 2nd Step Circuit consists of the Center Airbag Sensor Assembly and the Front Passenger Airbag Assembly. The circuit signals the Supplemental Restraint System (SRS) to deploy when deployment conditions are met. The Diagnostic Trouble Code (DTC) is recorded when a malfunction is detected in the Front Passenger Side Squib 2nd Step Circuit.

OBDII Code B1816 Toyota - Open In Front Passenger Side Squib 2nd Step Circuit - AutoCodes.com — B1816 Toyota Code - Open In Front Passenger Side Squib 2nd Step Circuit

What does this mean?

What are the Possible Causes of the DTC B1816 Toyota?

Instrument panel wire
Faulty Front Passenger Airbag Assembly (Front Passenger Side Squib 2nd Step)
Front Passenger Airbag Assembly harness is open or shorted
Front Passenger Airbag Assembly circuit poor electrical connection
Faulty Center Airbag Sensor Assembly

How to Fix the DTC B1816 Toyota?

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 B1816 Toyota 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 B1816 Toyota code?

Need more information on how to fix the B1816 Toyota code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1816 Toyota code diagnosed by a professional: Find a repair shop in your area

Information for Specific Toyota Models

B1816 2013 Toyota RAV4 — Open In Front Passenger Side Squib 2nd Step Circuit
B1816 2014 Toyota RAV4 — Open In Front Passenger Side Squib 2nd Step Circuit
B1816 2015 Toyota RAV4 — Open In Front Passenger Side Squib 2nd Step Circuit
B1816 2016 Toyota RAV4 — Open In Front Passenger Side Squib 2nd Step Circuit
B1816 2017 Toyota RAV4 — Open In Front Passenger Side Squib 2nd Step Circuit
B1816 2018 Toyota RAV4 — Open In Front Passenger Side Squib 2nd Step 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 B1816 Toyota Code

1. What are the common symptoms of OBDII code B1816 in a Toyota related to an open in the front passenger side squib 2nd step circuit?

The common symptoms include an illuminated airbag warning light on the dashboard and a potential loss of airbag functionality on the front passenger side.

2. What are some possible causes of OBDII code B1816 indicating an open in the front passenger side squib 2nd step circuit in a Toyota?

Possible causes include a damaged or disconnected wiring harness, a faulty squib 2nd step module, or a problem with the airbag control unit.

3. How can I diagnose the issue related to OBDII code B1816 on my Toyota indicating an open in the front passenger side squib 2nd step circuit?

A thorough inspection of the wiring harness, connectors, and components associated with the front passenger side airbag system is necessary. Using a multimeter to test for continuity and resistance can help pinpoint the source of the open circuit.

4. Is it safe to drive my Toyota with OBDII code B1816 present?

It is not recommended to drive the vehicle with this code present, as the front passenger side airbag may not deploy in the event of a collision, potentially compromising the safety of the occupants.

5. Can I reset the OBDII code B1816 on my Toyota related to an open in the front passenger side squib 2nd step circuit?

Simply clearing the code without addressing the underlying issue will not solve the problem. It is crucial to diagnose and repair the root cause of the open circuit before resetting the code.

6. How should I repair OBDII code B1816 indicating an open in the front passenger side squib 2nd step circuit in my Toyota?

Repairing this issue may involve repairing or replacing damaged wiring, connectors, or components in the front passenger side airbag system as needed.

7. Will fixing OBDII code B1816 myself require specialized tools or expertise?

Repairing this issue may require basic automotive repair tools and some knowledge of electrical systems. However, for more complex diagnostics and repairs, it is advisable to consult a professional technician.

8. Can weather or environmental factors cause OBDII code B1816 to trigger in a Toyota?

Extreme temperatures, moisture, or physical damage to the wiring harness can potentially lead to an open circuit fault like OBDII code B1816 in the front passenger side squib 2nd step circuit.

9. How long does it typically take to repair OBDII code B1816 on a Toyota caused by an open in the front passenger side squib 2nd step circuit?

The repair time can vary depending on the exact cause of the issue and the extent of the damage. Simple fixes like reconnecting a loose wire may take a short time, while more complex repairs could require several hours.

10. Are there any recalls or service bulletins related to OBDII code B1816 in Toyota vehicles?

It is advisable to check with Toyota dealerships or online databases for any recalls or service bulletins related to OBDII code B1816 specifically for your Toyota model.