AutoCodes – Mitsubishi – B1B09 Mitsubishi

B1B09 Mitsubishi Code - Passenger Airbag Squib 1 Circuit High

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 Passenger Airbag Squib 1, Passenger Airbag Squib 1 harness is open or shorted, Passenger Airbag 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: B1B09 Mitsubishi indicates Passenger Airbag Squib 1 Circuit High.
Common causes: Common causes include Faulty Passenger Airbag Squib 1, Passenger Airbag Squib 1 harness is open or shorted, Passenger Airbag 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 1,744

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 B1B09 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 SRS Load Tool Adapter 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 B1B09 Mitsubishi - Passenger Airbag Squib 1 Circuit High - AutoCodes.com — B1B09 Mitsubishi Code - Passenger Airbag Squib 1 Circuit High

What does this mean?

What are the Possible Causes of the DTC B1B09 Mitsubishi?

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

How to Fix the DTC B1B09 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 B1B09 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 B1B09 Mitsubishi code?

Need more information on how to fix the B1B09 Mitsubishi code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1B09 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 B1B09 Mitsubishi Code

1. What are the common symptoms of OBDII code B1B09 in a Mitsubishi related to the Passenger Airbag Squib 1 Circuit High?

- The common symptoms include the airbag warning light staying illuminated on the instrument panel and the passenger airbag system potentially being disabled.

2. What could cause the OBDII code B1B09 in a Mitsubishi indicating Passenger Airbag Squib 1 Circuit High?

- The code B1B09 typically indicates a high resistance or open circuit in the wiring connecting the passenger airbag squib 1 or a fault within the squib itself.

3. How should I diagnose the OBDII code B1B09 in my Mitsubishi related to Passenger Airbag Squib 1 Circuit High?

- Diagnosing this code usually involves checking the wiring harness for any visible damage, testing the resistance of the circuit, and inspecting the passenger airbag squib 1 for faults.

4. Can I continue driving my Mitsubishi with the OBDII code B1B09 signaling Passenger Airbag Squib 1 Circuit High?

- It is not recommended to drive the vehicle with an active airbag fault code, as it may compromise the effectiveness of the passenger airbag system in the event of a collision.

5. How can I repair the OBDII code B1B09 in my Mitsubishi indicating Passenger Airbag Squib 1 Circuit High?

- Repairing this issue often involves repairing or replacing damaged wiring, addressing any faults in the passenger airbag squib 1, and clearing the fault code with a diagnostic tool.

6. Is it safe to reset the OBDII code B1B09 related to Passenger Airbag Squib 1 Circuit High without fixing the underlying issue?

- It is not recommended to clear the fault code without addressing the root cause, as it may lead to the airbag system not functioning properly in an emergency situation.

7. Are there any safety precautions I should take when working on the Passenger Airbag Squib 1 Circuit in my Mitsubishi?

- Prior to working on the airbag system, it is crucial to disconnect the vehicle's battery and wait for at least 10-15 minutes to allow the system to discharge to avoid accidental airbag deployment.

8. How can a professional mechanic help with diagnosing and repairing the OBDII code B1B09 in my Mitsubishi?

- A trained mechanic will have the proper tools and knowledge to accurately diagnose the issue, perform any necessary repairs safely, and ensure that the airbag system functions correctly after the repair.

9. Can a faulty Passenger Airbag Squib 1 Circuit High code impact other safety features in my Mitsubishi?

- While the specific impact may vary, unresolved airbag system faults can potentially affect the overall functionality of the supplemental restraint system, compromising passenger safety in certain situations.

10. Is it possible to prevent the occurrence of the OBDII code B1B09 related to Passenger Airbag Squib 1 Circuit High in my Mitsubishi?

- Regular maintenance checks, prompt addressing of any airbag warning lights, and avoiding physical damage to the airbag system components can help prevent issues leading to this fault code.