AutoCodes - OBDII Code List - B1B12 MITSUBISHI

B1B12 MITSUBISHI - Driver Knee Bolster Squib Circuit Open

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3    What is this?
Table of contents

B1B12 MITSUBISHI Possible Causes

  • 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 do I fix code B1B12 MITSUBISHI?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Cost of diagnosing the B1B12 MITSUBISHI code

Labor: 1.0

The cost of diagnosing the B1B12 MITSUBISHI code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

When is the code detected?

This Diagnostic Trouble Code (DTC) sets when the ORC detects an open on the driver knee bolster squib circuit for more than 2.5 seconds. This DTC transitions from active to stored when the ORC sees a recovery from a short to ground for greater than 2.5 seconds.

Possible Symptoms

  • Air Bag Warning Light ON

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 More Information

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

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.

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