The Ultimate Guide to OBD-II Code B2293: Frontal Airbag Circuit Fault

What Does B2293 Mean?

B2293 is a body-specific diagnostic trouble code (DTC) indicating the Restraints Control Module (RCM) detects a fault in a frontal airbag deployment circuit. The computer continuously monitors electrical resistance. If the reading falls outside a specific range, it interprets this as an open or short circuit. As a fail-safe, the RCM disables the airbag system and illuminates the dashboard warning light.

Technical definition: The Restraints Control Module (RCM) detects an out-of-specification resistance, open circuit, short to voltage, or short to ground in a frontal airbag deployment loop. The acceptable resistance range is manufacturer-specific but typically narrow (e.g., 1.31 to 4.29 ohms for Ford). Any reading outside this range triggers B2293 and deactivates the SRS.

Can I Drive With B2293?

No — Do Not Drive. This code indicates a critical Supplemental Restraint System (SRS) fault. The computer disables the airbags, meaning they will not deploy in a crash. Do not drive the vehicle until repaired.

Common Causes

• Faulty Clockspring (Steering Wheel Roll Connector) (Very Common) — The clockspring is a coiled ribbon of wires in the steering column that maintains electrical contact for the driver's airbag, horn, and steering wheel controls. Constant rotation eventually causes these thin wires to fatigue and break, creating high resistance or an open circuit. This causes over 80% of B2293 codes.
• Damaged Wiring, Loose Connectors, or Corroded Pins (Common) — Airbag wiring runs throughout the vehicle. Connectors under the front seats frequently become loose from shoved cargo, or their internal metal pins corrode from moisture. This creates high resistance or an open circuit, triggering the code.
• Faulty Seat Belt Pretensioner (Common) — Pretensioners use a small pyrotechnic charge to tighten the seatbelt instantly during a collision. As part of the SRS circuit, the pretensioner's internal wiring fails or develops incorrect resistance, which the RCM detects as a fault.
• Defective Passenger Occupancy Sensor (OCS) Mat (Common) — Commonly seen in BMW and GM vehicles, this pressure-sensitive mat in the passenger seat cushion detects weight to enable the airbag. Repeated flexing causes internal cracks in the mat's circuitry, leading to a resistance fault.
• Defective Airbag Module (Squib/Inflator) (Less Common) — The airbag unit itself contains a pyrotechnic inflator charge (squib) with internal wiring. This module fails its own internal resistance check with age or due to manufacturing defects, causing the RCM to log B2293.
• Previous Accident or Improper Repair (Less Common) — If the vehicle was in an accident, the RCM stores permanent 'crash data' that must be cleared by a professional. Additionally, sloppy previous repairs leave behind damaged wiring or connectors that cause intermittent faults later.
• Faulty Restraints Control Module (RCM) (Rare) — The RCM is the central computer for the airbag system. Internal failure is possible, causing the RCM to generate false codes by detecting a circuit fault when all external components and wiring are perfectly fine.

Symptoms

• Solid or Flashing Airbag Warning Light — The primary symptom. The light stays on continuously, or on some vehicles (notably Ford), flashes a two-digit Lamp Fault Code (LFC) before staying solid.
• Steering Wheel Controls Inoperative — If the horn, cruise control, or audio buttons fail simultaneously with the airbag light, a faulty clockspring is the almost certain cause.
• Audible Chime (e.g., Ford's 5x5 Beep) — On some Fords, if the airbag warning light bulb burns out, the RCM triggers a repetitive audible chime (five sets of five beeps) to alert the driver of a critical SRS fault.
• Intermittent Airbag Light — The light comes on after hitting a bump, adjusting the seat, or turning the steering wheel, and then goes off. This points to a loose connector or a wire beginning to break inside the clockspring.
• Airbags Are Disabled (scan-tool only — no driver-felt sign) — When the airbag light is on for a B2293 code, the entire Supplemental Restraint System deactivates as a safety precaution and will not deploy in an accident.

Diagnostic Flowchart

Tap your situation to follow the diagnostic path that matches what you're seeing on this code.

Common Fixes & Costs

• Replace the Clockspring — Parts: $75-$400, Labor: $150-$300, ~1.2 hr book time (Intermediate)
• Repair Wiring or Replace Connector — Parts: $10-$50, Labor: $150-$400, ~2 hr book time (Intermediate)
• Replace Passenger Occupancy Sensor Mat — Parts: $100-$300, Labor: $300-$500, ~3.5 hr book time (Professional)
• Replace Seat Belt Pretensioner — Parts: $150-$400, Labor: $100-$250, ~1.5 hr book time (Intermediate)
• Replace or Reset the RCM — Parts: $200-$800, Labor: $100-$300, ~1.5 hr book time (Professional)

Used vs. New Parts: Buying Guide

When a used part is worth it: For clocksprings, a used OEM part from a low-mileage, non-collision donor vehicle is a budget-conscious choice for older cars. It is safer than a cheap, unbranded aftermarket part.

Donor-vehicle mileage cap: roughly under 70000 miles for the part to have meaningful remaining life.

Donor quality checklist:

• Verify the part number matches your vehicle's specific options (e.g., with/without cruise control) exactly.
• Source from a reputable auto recycler that provides the donor vehicle's VIN and mileage.
• Visually inspect connectors for any signs of corrosion, damage, or pushed-out pins.

Decision logic:

• If Vehicle is under 10 years old or has low mileage → Buy a new OEM part. The reliability and safety assurance are worth the extra cost.
• If Budget is the primary concern on an older vehicle → A used OEM part is acceptable, but carries the risk of a shorter remaining lifespan.
• If Choosing aftermarket → Select a well-known brand like Dorman or Standard Motor Products. Avoid the cheapest online options, as their quality is highly questionable for a critical safety component.

Warranty tradeoff: Used parts typically offer a 30-90 day functional warranty. New aftermarket parts usually come with a 1-year to limited lifetime warranty. New OEM parts carry a 1-2 year warranty.

Worst-case if a used part fails: $200-$500 if a used or cheap aftermarket part fails prematurely, requiring repeat labor costs plus the price of another replacement part.

What Happens If You Wait — Timeline

1. Instant: The RCM detects an out-of-range resistance reading during a self-test. The airbag warning light illuminates, and the entire SRS system is immediately disabled. (MPG impact: 0%% · Added cost: $0)
2. 0-2 months: The fault is intermittent, with the light turning on and off depending on temperature or bumps. This indicates a loose connection or a wire starting to break. (MPG impact: 0%% · Added cost: $50-$200 in potential fines or failed inspection fees.)
3. 2-6 months: The intermittent fault becomes a permanent, 'hard' fault. The light stays on constantly. Fretting corrosion within the connector makes a simple reseating less likely to be a permanent fix. (MPG impact: 0%% · Added cost: $100-$400 if the connector is now damaged and requires a new pigtail to be spliced in.)
4. 6+ months: If the root cause is moisture, corrosion spreads from the initial fault point to other pins or to the control module itself, potentially destroying the RCM. (MPG impact: 0%% · Added cost: $500-$1500+ to replace a wiring harness or a damaged RCM.)

Cost of Not Fixing It

• Immediate: The entire Supplemental Restraint System (SRS) is disabled and will not deploy in a collision. This drastically increases the risk of severe injury or death. (Added cost: N/A)
• 0-6 months: Failure to pass a mandatory state safety inspection in states that check for SRS warning lights, preventing legal registration renewal. (Added cost: $50-$200 in inspection fees and potential fines.)
• 6+ months: If the root cause is moisture intrusion, corrosion spreads to adjacent wiring harnesses or control modules, causing complex and expensive electrical failures. (Added cost: $500-$2000+)

Diagnosis Steps

1. Retrieve Full DTC with SRS-Capable Scanner
   Use an OBD-II scanner that accesses the Restraints Control Module (RCM/SRS). A basic engine code reader will not work. Note the full code, including any manufacturer-specific sub-codes (e.g., B2293:E0).
   Tools: SRS-capable OBD-II Scanner (Beginner)
2. Test All Steering Wheel Functions
   Systematically check the horn, cruise control, and all audio/phone buttons on the steering wheel. If any are inoperative, the clockspring is the prime suspect.
   Tools: None (Beginner)
3. Note Lamp Fault Code (LFC) Pattern (If Applicable)
   On Ford, Lincoln, and Mercury vehicles, watch the airbag light when you first turn the key. It flashes a two-digit code (e.g., one flash, pause, nine flashes is '19'). LFC 19 points to the driver's side; LFC 21 points to the passenger's side.
   Tools: None (Beginner)
4. Inspect Under-Seat Connectors and Wiring
   Look under both front seats for the distinct yellow SRS connectors. Ensure they are fully seated and locked. Unplugging and securely reconnecting them often resolves an intermittent fault.
   Tools: Flashlight (Intermediate)
5. Analyze Live SRS Data
   Using an advanced bi-directional scan tool, access the live data stream from the RCM. This shows real-time resistance readings (in ohms) for each airbag circuit. A reading of 0 ohms indicates a short circuit; a very high or 'O.L.' reading indicates an open circuit.
   Tools: Advanced Bi-directional Scan Tool (Advanced)
6. Perform a Wiggle Test
   While monitoring live resistance data, carefully wiggle key wiring harnesses and connectors. Start with the steering column, then under-seat connectors. If the resistance value jumps or normalizes as you move a specific wire, you found the intermittent open or short.
   Tools: Advanced Bi-directional Scan Tool (Advanced)
7. Use an Airbag Circuit Simulator/Resistor (Professional Only)
   DANGER: After disconnecting the battery and waiting 30 minutes, disconnect the suspect component. Connect a special SRS diagnostic resistor (typically 2.0-3.3 ohms) to the vehicle-side connector. Reconnect the battery and clear codes. If B2293 does not return, the disconnected component is faulty.
   Tools: SRS Diagnostic Resistor Set (Professional)
8. Test Clockspring Continuity (Professional Only)
   After removing the airbag and clockspring, use a multimeter set to ohms to check the continuity of each wire trace in the clockspring. Slowly rotate the clockspring from lock to lock. If the reading jumps to infinity (O.L.) at any point, the internal ribbon is broken.
   Tools: Multimeter, Clockspring Pinout Diagram (Professional)

When This Code Triggers (Freeze-Frame Conditions)

• System Self-Test: Fail (The RCM performs an electrical integrity check of all SRS circuits upon every ignition cycle. B2293 sets the instant this self-test fails.)
• Circuit Resistance: <0.9 ohms or >5.0 ohms (The code triggers when the RCM measures resistance in a frontal deployment loop outside the manufacturer's specified range, indicating a short or open circuit.)
• Event Data Recorder (EDR) Status: No Crash Event (Unlike crash codes, B2293 is a circuit fault code. The RCM logs this electrical failure but does not store detailed crash data unless the fault coincides with an impact.)
• Ignition Status: ON (The fault is detected and the warning light illuminates when the ignition turns to the 'ON' or 'RUN' position, initiating the SRS self-check.)

Related Codes

• B1919 / B1921 (Ford LFCs) — These are Ford-specific Lamp Fault Codes (LFCs) blinked by the airbag light. LFC 19 indicates a driver-side fault, while LFC 21 indicates a passenger-side fault.
• B2290 — B2290 points to a fault within the Occupant Classification System (OCS). You get B2293 if the wiring to the OCS is bad, but B2290 if the OCS mat itself fails internally.
• B1869 — This code for a 'Burnt Out Airbag Warning Lamp' often appears alongside B2293 on Fords. If the dashboard bulb fails, the RCM logs B1869 and triggers an audible chime to signal the underlying B2293 fault.
• B2292 — This code is specific to seat belt pretensioner circuits. While B2293 is a general frontal circuit fault, B2292 specifically flags a pretensioner loop problem.

Climate & Environmental Factors

• Cold Weather: Low temperatures cause materials in wiring and connectors to contract, creating a temporary open circuit. This leads to an intermittent airbag light on cold starts that disappears as the cabin warms up.
• High Humidity / Water Intrusion: Moisture leads to corrosion on connector pins and circuit boards within the SRS system. This corrosion increases resistance or causes short circuits, leading to persistent faults.

How to Talk to a Mechanic About This Code

Say this: "I have an airbag warning light and my scanner shows code B2293, a frontal airbag circuit fault. I'd like to schedule a diagnostic to pinpoint the issue. If it's a Ford, add: 'The light is flashing code 19, so I suspect the clockspring or a driver-side wiring issue.'"

This signals that you are an informed customer. You identified the specific system (SRS) and code, directing the technician to the correct diagnostic path and discouraging unnecessary services.

Avoid saying:

• 'My airbag light is on, can you just fix it?'
• 'I'm not sure what's wrong, just do whatever it takes.'
• 'My friend said it's probably the clockspring.' (Let the shop do its own diagnosis).

Questions to ask before authorizing the repair:

• What were the live resistance (ohm) readings for the driver and passenger airbag circuits?
• Based on the diagnostic, what is the specific point of failure you identified?
• If the clockspring needs replacement, does the cost include centering the new part and clearing the code from the RCM?
• What is the warranty on the recommended parts and labor?

Where to Take It: Dealer vs Independent vs Chain

• Dealer: Recommended if your vehicle is covered by an extended warranty for the clockspring or passenger seat sensor, as the repair is free. Otherwise, it is a safe but expensive option.
  Best for: Vehicles under a manufacturer's original or extended warranty (many clocksprings and OCS sensors have extended coverage)., Complex electrical issues or if a Restraints Control Module (RCM) needs programming., Recalls related to the SRS system.
  Downsides: Highest labor rates, typically 1.5-2x more than an independent shop., Defaults to replacing larger, more expensive assemblies rather than repairing a simple wire or connector. (Typical cost: +50% vs. baseline)
• Independent Shop: Best fit for most situations. An ASE-certified independent technician diagnoses and repairs a B2293 code effectively and more affordably than a dealer. Ensure they have an SRS-capable scan tool.
  Best for: Out-of-warranty vehicles where cost is a major factor., Common, well-documented repairs like a clockspring or pretensioner replacement., Shops with strong reviews and ASE-certified technicians specializing in diagnostics.
  Downsides: Shop quality and diagnostic capabilities vary widely., Lacks access to the very latest manufacturer-specific tools for brand-new models. (Typical cost: +0% vs. baseline)
• Chain Shop: Not Recommended. The safety-critical nature of the airbag system requires diagnostic expertise not typically found at chain repair shops.
  Best for: Simple, routine maintenance like oil changes or tires.
  Downsides: Technicians lack the specialized training for SRS diagnostics., High risk of misdiagnosis, leading to unnecessary parts replacement., Improper repair (e.g., not centering a clockspring) is highly likely. (Typical cost: -10% vs. baseline)

When to Walk Away From the Repair

If the estimated repair cost for the B2293 fault exceeds 50% of your car's private-party value, and the car has other pending issues, consider selling it as-is. Because this is a critical safety issue, you cannot simply ignore it and keep driving.

• Car worth $3000, fix is $750: Fix it. The repair cost is 25% of the car's value and makes the vehicle safe and sellable.
• Car worth $4000, fix is $2200: Walk away. The repair cost is over 50% of the vehicle's value. The airbags are disabled, making the car unsafe to drive.

What Scan Tool You Need for This Code

Minimum: A scanner that reads and clears codes from the SRS / Airbag module. Basic engine-only code readers will not work for B2293.

A standard $20 code reader only communicates with the Powertrain Control Module (engine and transmission). It cannot see the Restraints Control Module (RCM) where airbag codes are stored.

Budget: Autel AutoLink AL619 (~$65) — Reads and clears engine, ABS, and SRS (airbag) codes on most major vehicle makes. It confirms the B2293 code and clears it after the repair is complete.

Mid-range: BlueDriver Pro (~$120) — Connects to your smartphone via Bluetooth. It reads and clears SRS codes and displays live data for SRS circuits. This allows you to watch the resistance of the clockspring circuit in real-time as you turn the steering wheel.

Professional: Autel MaxiCOM MK808 / Foxwell NT630 Plus (~$350-550) — Professional-level tools offering comprehensive diagnostics, including reading live SRS data streams, viewing manufacturer-specific codes, and performing system-specific functions.

Rent vs buy: Auto parts stores offer loaner tool programs, but free-to-use scanners typically only read engine codes. You must specifically ask for a scanner that reads airbag codes. If you plan to do your own car maintenance, buying a midrange scanner is a worthwhile investment.

How to Clear the Code After You Fix It

1. Disconnect the negative battery terminal and wait 30 minutes before performing the repair.
2. Reconnect the battery.
3. Use an SRS-capable OBD-II scan tool to connect to the Restraints Control Module (RCM).
4. Select the function to clear/erase DTCs.
5. Cycle the ignition off, then on, and verify the airbag warning light performs its self-check (illuminates for a few seconds, then turns off).

Drive cycle (~15 minutes): A traditional emissions 'drive cycle' is not required. The RCM performs a complete self-test each time the vehicle starts. After clearing the code, a 15-minute test drive with several key cycles ensures the fault does not return.

Readiness monitors affected: None

Watch out for:

• Using a basic engine code reader that cannot communicate with the SRS module.
• Forgetting to clear the 'hard code' from the RCM's memory after the repair is complete.
• Installing a new clockspring without centering it, causing the internal ribbon to snap on the first turn of the steering wheel.
• Replacing a good clockspring when the actual fault was in the wiring harness.

Will This Fail Emissions / State Inspection?

No — by itself this code doesn't fail OBD inspection (but it can keep readiness monitors from setting, which causes a separate fail).

• California: Will PASS the smog check. California's inspection focuses on emissions; the SRS system is not part of that test.
• New York: Technically will PASS. NYS law states an illuminated airbag light is an advisory issue noted on the inspection report, but it is not grounds for failure.
• Texas: Will PASS the state inspection. The airbag system is not an inspected item in Texas; the safety inspection focuses on brakes, horn, and lights.
• Virginia / Pennsylvania: Will FAIL the state safety inspection. These states have comprehensive safety inspections that treat an illuminated airbag light as a critical failure.

Most Commonly Affected Vehicles

• Ford F-150 (2004-2008) — Extremely common issue, presenting as a flashing airbag code 19 (driver side) or 21 (passenger side). The clockspring is the primary cause, but under-seat connectors are also frequent culprits.
• Ford Focus (2008-2011) — A well-documented failure of the clockspring directly causes a B2293 code. Owners report the horn and steering wheel controls failing at the exact same time as the airbag light.
• Hyundai / Kia Sonata / Optima (2009-2014) — The clockspring is a very common failure item, leading to an airbag light and loss of steering wheel controls. Hyundai extended the warranty on this part for many models to 15 years.
• BMW 3-Series (E90/E91/E92/E93) (2006-2013) — The passenger seat occupancy sensor mat is the most frequent cause of an SRS light. The mat cracks internally from wear. BMW extended the warranty for this component to 15 years on many vehicles.
• Subaru Outback / Legacy (2010-2014) — Subaru calls the clockspring a 'roll connector'. A recall (WVR-28) was issued for 2010 models due to stress cracks forming in the internal wiring.
• Jaguar XJ (X350/X358), XK (X150) (2003-2014) — This code appears intermittently on these models. The cause is frequently traced to the large wiring harness connectors under the front seats getting disturbed when the seat is moved.

Manufacturer-Specific Notes

• Ford: Ford's flashing Lamp Fault Codes (LFCs) are key diagnostic clues. Code 19 almost always points to the driver's side. A specific 'repower procedure' is required after repair, involving reconnecting the battery in a specific sequence with the key on.
• BMW: The passenger seat occupancy sensor mat is a notoriously common failure. BMW extended warranties for this part on numerous models to 15 years/unlimited miles.
• Nissan: On older Nissans, an intermittent airbag fault clears without a scan tool. Enter manual diagnostic mode by turning the ignition key from OFF to ON repeatedly in a specific sequence.
• Subaru: Subaru calls the clockspring a 'Steering Roll Connector'. A recall (WVR-28) was issued for 2010 Legacy and Outback models due to stress cracks in the internal wiring. You must transfer the steering angle sensor to the new part.
• Hyundai: Hyundai extended the clockspring warranty to 15 years with unlimited mileage for many vehicles, including the Sonata and Elantra. Dealer diagnosis is often free under this program.

Real Owner Stories

2007 Ford F-150 with flashing airbag light code 19

Airbag light flashed code 19 (driver-side fault). Horn and cruise control still worked, making the owner doubt the common clockspring diagnosis.

Outcome: After reassembling everything, the light went out and stayed off. The root cause was simply a loose connector reseated during the diagnostic process.

Lesson: Even with classic symptoms, don't assume a part has failed. Always check the simplest solution first: ensuring all relevant connectors are clean, undamaged, and securely seated.

Jaguar XJR with an intermittent B2293 code

The airbag light came on intermittently, especially after the car parked in the sun. The problem started after searching for a lost phone under the driver's seat.

Outcome: The connector was properly secured, and the light remained off permanently. The heat-related onset was due to materials expanding and contracting.

Lesson: Pay attention to when the fault started. If it appeared right after cleaning the car or adjusting a seat, the cause is likely a disturbed wire in that specific area.

2005 Ford F-150 with B2293 and a seat swap

An owner had an airbag light with code B2293 and a flashing code 21 (passenger side). They recently installed seats from a 2007 model into their 2005 truck.

Outcome: The actual problem was an incompatibility between the passenger seat's Occupant Classification System (OCS) from the 2007 model and the 2005 truck's RCM. It required a seat weight sensor recalibration.

Lesson: When modifying a vehicle, be aware of electronic incompatibilities. Swapping seats triggers SRS codes if the sensors are not identical or recalibrated for the new vehicle.

Hyundai with repeated clockspring failures

A Hyundai owner was on their fourth replacement clockspring, with the most recent one failing after only five days.

Outcome: The cause was improper installation. If the new clockspring is not installed with the steering system perfectly centered, the internal ribbon cable tears during full-lock turns, causing immediate failure.

Lesson: For clocksprings, the installation procedure is as critical as the part itself. A repeat failure of the same component points to an error in the installation process (like not centering the part).

How to Prevent This Code From Triggering

• Be gentle with under-seat areas (Ongoing) — Forcefully shoving items under the front seats snags or disconnects the yellow SRS connectors for the seat belt pretensioners, causing an open circuit fault.
• Protect from moisture (During cleaning/spills) — Moisture seeps into connectors and the RCM, causing corrosion that increases resistance and triggers faults.
• Avoid sharp, full-lock steering turns when stationary (Daily habit) — Repeatedly turning the steering wheel to its absolute limit puts maximum stress on the clockspring's internal ribbon cable, shortening its lifespan.
• Address water leaks immediately (As needed) — A leaking windshield seal or sunroof drain allows water to drip onto SRS components, leading to corrosion and difficult-to-diagnose electrical faults.

Frequently Asked Questions

Can I reset the B2293 code by disconnecting the battery?

No. SRS codes are stored in the Restraints Control Module's non-volatile memory, meaning they persist even without power. The code can only be cleared with an SRS-capable OBD-II scan tool after the physical fault is corrected.

Why is my airbag light still on after replacing the clockspring?

Four common reasons exist: the code wasn't cleared with an SRS scanner, the new clockspring wasn't centered and snapped immediately, the replacement part is defective, or the root cause is actually in the wiring. Always clear the hard code from the RCM after repair.

My airbag light is solid, not flashing. What does that mean?

A solid light indicates a continuous fault, a higher-priority code, or simply that your vehicle's model year does not use flashing Lamp Fault Codes. A proper scan with an SRS-capable tool is the only way to identify the exact issue.

Is it safe to work on my own airbag system?

It is extremely dangerous for untrained individuals because airbags deploy with explosive force. Always disconnect the negative battery terminal and wait 30 minutes for backup capacitors to discharge before touching any SRS component. Never probe airbag connectors with a standard multimeter.

Why did my horn and airbag light fail at the same time?

This is the classic symptom of a failed clockspring. When its internal wires break, the airbag circuit opens (triggering the light) and the horn button loses its electrical connection simultaneously.

Can I use a cheap Bluetooth OBD-II reader for this?

No. Standard $20 code readers only communicate with the Powertrain Control Module (engine and transmission). Airbag codes are stored in a separate computer, the RCM, requiring a more advanced scanner.

Can I install seats from another truck in my F-150?

Swapping seats often triggers airbag codes because the Occupant Classification System (OCS) sensors differ between years or trims. This incompatibility causes the RCM to set a code. You must swap the original sensor into the new seat or perform a sensor recalibration with a high-end scan tool.

Key Takeaways

• Code B2293 disables your entire airbag system immediately, meaning no airbags will deploy in a crash.
• A failed clockspring causes over 80% of B2293 codes, confirmed if your horn or steering wheel buttons fail simultaneously.
• Check the yellow SRS connectors under both front seats first; loose pins or shoved cargo cause at least 15% of intermittent B2293 faults.
• You must use an SRS-capable scan tool (like a BlueDriver or Autel) to read and clear this code; standard $20 engine readers cannot access the airbag module.
• Never probe airbag connectors with a standard multimeter; the tool's 9-volt battery provides enough voltage to accidentally deploy the airbag.