AutoCodes – Mitsubishi – B1B12 Mitsubishi

B1B12 Mitsubishi Code - Driver Knee Bolster Squib Circuit Open

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 Driver Knee Bolster Squib, Driver Knee Bolster Squib harness is open or shorted, Driver Knee Bolster Squib 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: B1B12 Mitsubishi indicates Driver Knee Bolster Squib Circuit Open.
Common causes: Common causes include Faulty Driver Knee Bolster Squib, Driver Knee Bolster Squib harness is open or shorted, Driver Knee Bolster Squib 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 3,985

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 B1B12 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 Adaptor provides a test point as well as a method for opening the shorting bar connections within the harness connector. The ORC Module 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 B1B12 Mitsubishi - Driver Knee Bolster Squib Circuit Open - AutoCodes.com — B1B12 Mitsubishi Code - Driver Knee Bolster Squib Circuit Open

What does this mean?

What are the Possible Causes of the DTC B1B12 Mitsubishi?

Faulty Driver Knee Bolster Squib
Driver Knee Bolster Squib harness is open or shorted
Driver Knee Bolster Squib circuit poor electrical connection
Faulty Driver Knee Bolster Airbag
Faulty Occupant Restraint Controller (ORC)

How to Fix the DTC B1B12 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 B1B12 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 B1B12 Mitsubishi code?

Need more information on how to fix the B1B12 Mitsubishi code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1B12 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 B1B12 Mitsubishi Code

1. What are the common symptoms of OBDII code B1B12 "Driver Knee Bolster Squib Circuit Open" in a Mitsubishi?

- The common symptoms include the airbag warning light illuminating on the dashboard and potential non-deployment of the driver's knee airbag during a collision.

2. What can cause the OBDII code B1B12 in a Mitsubishi?

- The code B1B12 typically indicates an open circuit in the driver knee bolster squib circuit, which could be caused by a damaged wiring harness, faulty squib connector, or a defective knee airbag module.

3. How can I diagnose the root cause of OBDII code B1B12 in my Mitsubishi?

- To diagnose the issue, you may need to visually inspect the wiring harness, connectors, and components related to the driver knee airbag system. Using a multimeter to test for continuity and resistance can help pinpoint the exact location of the open circuit.

4. Can I repair the Driver Knee Bolster Squib Circuit Open issue in my Mitsubishi at home?

- Depending on your skill level and access to tools, you may be able to repair the open circuit causing code B1B12 at home. However, dealing with airbag systems requires caution and precision, so it is recommended to consult a professional if you are not confident in your abilities.

5. Is it safe to drive my Mitsubishi with OBDII code B1B12 present?

- It is not recommended to drive your Mitsubishi with the B1B12 code active, as it indicates a potential issue with the driver knee airbag system. In the event of a collision, the airbag may not deploy as intended, compromising your safety.

6. How much does it typically cost to repair the Driver Knee Bolster Squib Circuit Open problem in a Mitsubishi?

- The cost of repairing the B1B12 code can vary depending on the exact cause of the issue and whether you choose to DIY or seek professional help. Costs may include replacement parts, labor fees, and diagnostic charges.

7. Will resetting the OBDII code B1B12 make the issue go away permanently?

- Resetting the B1B12 code may temporarily turn off the warning light, but if the underlying issue causing the open circuit is not resolved, the code is likely to reappear. It is crucial to address the root cause of the problem for a permanent fix.

8. Can a disconnected battery reset the OBDII code B1B12 in a Mitsubishi?

- Disconnecting the battery may reset the code temporarily, but if the open circuit causing the B1B12 persists, the code will likely reappear once the system detects the fault again.

9. Are there any recalls or service bulletins related to OBDII code B1B12 in Mitsubishi vehicles?

- It's recommended to check with your local Mitsubishi dealership or visit the manufacturer's official website to inquire about any recalls or service bulletins related to the B1B12 code in your specific vehicle model.

10. How important is it to fix the OBDII code B1B12 issue in a Mitsubishi promptly?

- Promptly addressing the B1B12 code is crucial to ensure the proper functioning of the driver knee airbag system in your Mitsubishi. Delaying repairs could potentially compromise your safety in the event of a collision.