AutoCodes – Mitsubishi – B1B18 Mitsubishi

B1B18 Mitsubishi Code - Left Side Curtain Squib 1 Circuit Low

Quick Answer

When powered, the Occupant Restraint Controller (ORC) sends a test current to the squibs to verify the integrity of the squib and wiring. Common causes include Faulty Left Side Curtain Squib 1, Left Side Curtain Squib 1 harness is open or shorted, Left Side Curtain Squib 1 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: B1B18 Mitsubishi indicates Left Side Curtain Squib 1 Circuit Low.
Common causes: Common causes include Faulty Left Side Curtain Squib 1, Left Side Curtain Squib 1 harness is open or shorted, Left Side Curtain Squib 1 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 1,277

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 Aug 15, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1B18 Mitsubishi Description

When powered, the Occupant Restraint Controller (ORC) sends a test current to the squibs to verify the integrity of the squib and wiring. These circuits are maintained in a floating configuration at the module (connected to neither power nor ground) as protection against inadvertent deployment. The use of the Supplemental Restraint System (SRS) Load Tool Adapter Tool provides a test point as well as a method for opening the shorting bar connections within the harness connector. The ORC sends out a 40 mA diagnostic current on each squib voltage supply circuit at power up and every 500 ms thereafter while the ignition is on.

OBDII Code B1B18 Mitsubishi - Left Side Curtain Squib 1 Circuit Low - AutoCodes.com — B1B18 Mitsubishi Code - Left Side Curtain Squib 1 Circuit Low

What does this mean?

What are the Possible Causes of the DTC B1B18 Mitsubishi?

Faulty Left Side Curtain Squib 1
Left Side Curtain Squib 1 harness is open or shorted
Left Side Curtain Squib 1 circuit poor electrical connection
Faulty Left Side Curtain Airbag
Faulty Occupant Restraint Controller (ORC)

How to Fix the DTC B1B18 Mitsubishi?

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 B1B18 Mitsubishi 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 B1B18 Mitsubishi code?

Need more information on how to fix the B1B18 Mitsubishi code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1B18 Mitsubishi 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 B1B18 Mitsubishi Code

1. What are the common symptoms of OBDII code B1B18 Mitsubishi (Left Side Curtain Squib 1 Circuit Low)?

The common symptoms include the airbag warning light illuminating on the dashboard and the possibility of the left side curtain airbag not deploying in the event of a collision.

2. What could be the possible causes of OBDII code B1B18 Mitsubishi?

Possible causes of this code include a faulty left side curtain airbag squib (inflator), damaged wiring or connectors in the circuit, or a malfunction in the airbag control module.

3. How serious is the OBDII code B1B18 Mitsubishi (Left Side Curtain Squib 1 Circuit Low)?

This code indicates a potential issue with the left side curtain airbag system, which is a critical safety component in the vehicle. It is important to address this issue promptly to ensure the proper functioning of the airbag system in case of an accident.

4. What should I do if I encounter OBDII code B1B18 Mitsubishi?

If you encounter this code, it is recommended to have the vehicle inspected by a qualified mechanic or technician with experience in airbag systems. They can diagnose the specific cause of the issue and recommend the necessary repairs.

5. Can I still drive my vehicle with OBDII code B1B18 Mitsubishi present?

It is not advisable to drive the vehicle with this code present, as it indicates a potential problem with the left side curtain airbag system. Driving with a malfunctioning airbag system can compromise your safety in the event of a collision.

6. Are there any repair tips for fixing OBDII code B1B18 Mitsubishi?

Repairing this code may involve replacing the faulty left side curtain airbag squib, repairing damaged wiring or connectors, or reprogramming the airbag control module. It is best to follow the repair procedures outlined in the vehicle's service manual.

7. How can I prevent OBDII code B1B18 Mitsubishi from occurring again?

To prevent this code from occurring again, it is essential to perform regular maintenance checks on the airbag system, avoid tampering with the airbag components, and address any warning lights or issues promptly.

8. Is it safe to reset the OBDII code B1B18 Mitsubishi without fixing the underlying issue?

Resetting the code without addressing the underlying problem may temporarily clear the warning light, but it will not fix the issue with the airbag system. It is crucial to diagnose and repair the root cause of the problem to ensure the airbag system functions correctly.

9. How long does it typically take to repair OBDII code B1B18 Mitsubishi?

The repair time for this code can vary depending on the specific cause of the issue and the extent of the repairs needed. It is best to consult with a professional technician to get an accurate estimate of the repair timeline.

10. Can I clear OBDII code B1B18 Mitsubishi with an OBDII scanner?

Yes, an OBDII scanner can be used to clear the code from the vehicle's computer system. However, it is essential to note that clearing the code without fixing the underlying problem will not resolve the issue with the airbag system.