AutoCodes – Scion – B1818 Scion

B1818 Scion Code - Short To Positive 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: B1818 Scion indicates Short To Positive 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.

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Code Popularity 740

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
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Code B1818 Scion 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 B1818 Scion - Short To Positive In Front Passenger Side Squib 2nd Step Circuit - AutoCodes.com — B1818 Scion Code - Short To Positive In Front Passenger Side Squib 2nd Step Circuit

What does this mean?

What are the Possible Causes of the DTC B1818 Scion?

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 B1818 Scion?

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 B1818 Scion 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 B1818 Scion code?

Need more information on how to fix the B1818 Scion code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1818 Scion 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 B1818 Scion Code

1. What does the OBDII code B1818 mean for a Scion?

B1818 indicates a "Short to Positive in Front Passenger Side Squib 2nd Step Circuit," typically related to the airbag system.

2. What are the common symptoms of code B1818?

Common symptoms include the airbag warning light staying on and the airbag system potentially being disabled.

3. What causes the B1818 code to appear?

The code is usually caused by damaged wiring, a short circuit to positive voltage, a faulty airbag squib (inflator), or a malfunctioning airbag control module.

4. Can I drive my Scion with the B1818 code present?

While the vehicle may still drive, it is unsafe as the airbag system may not deploy correctly in an accident.

5. How is the B1818 code diagnosed?

A technician will inspect the airbag wiring harness, connectors, and squib for damage or shorts and may use a scan tool to test the airbag circuit.

6. What repairs are needed for the B1818 code?

Repairs may involve fixing or replacing damaged wiring, connectors, or the squib, and in some cases, replacing the airbag control module.

7. Can a loose connection trigger the B1818 code?

Yes, a loose or corroded connection in the airbag circuit can cause this code to appear.

8. Will clearing the code fix the B1818 issue?

No, the underlying issue must be repaired before clearing the code; otherwise, the problem will persist, and the code will return.

9. Is the B1818 code specific to Scion vehicles?

While the code and description are specific to Scion, similar codes may appear in other Toyota-related brands with comparable systems.

10. How much does it cost to fix the B1818 code?

Repair costs vary depending on the issue, but wiring repairs or squib replacement can range from $100 to $500, with higher costs if the airbag control module needs replacement.