B0111 Side airbag firing circuit open (Toyota, Lexus)

Side airbag squib circuit open

B0111 in short

On Toyota and Lexus vehicles, B0111 means the airbag computer found an open circuit in a front seat side airbag's firing circuit, often traced to the floor wiring harness or a connector. That side airbag may not deploy in a crash. Have a dealer check it soon, and never probe airbag wiring yourself.

Each side airbag in the front seats has a firing circuit called a squib circuit. The airbag computer checks it constantly, and if it sees the circuit open it stores B0111 (Toyota pairs it with B0116 for the other side airbag circuit) and turns on the SRS warning light.

Toyota and Lexus bulletins for the 2004–2009 Sienna, 2004–2008 RX, 2006–2008 4Runner and 2005–2009 GX 470 address this code with a repair manual supplement, new service parts, an updated wire harness, and a procedure to repair the floor harness and the side airbag squib circuit.

Toyota's owner's manual says the SRS light means a fault in the airbag, occupant classification or seat belt pretensioner systems, and to have the vehicle inspected right away. Side airbag circuits can fire if handled wrongly, so only a trained technician should work on them.

Most likely causes

  1. Floor wiring harness or side airbag circuit damage

    Supported by vehicle data
    Why it ranks here
    Toyota's Sienna bulletins give an updated repair procedure for B0111 and B0116 that repairs the floor harness and the side airbag squib circuit, and a Lexus GX 470 bulletin supplies an updated wire harness.
    What would change this
    Rises on a covered Sienna or GX 470, or if the light comes and goes. Falls if the harness checks good.

  2. Side airbag circuit part covered by a new service part

    Possible — needs testing
    Why it ranks here
    Toyota bulletins for the Sienna and 4Runner announce a new service part for B0111 and B0116. The summaries do not say which part, so this ranks below the harness repair.
    What would change this
    Rises if the dealer confirms your vehicle is covered by the new-part bulletin. Falls if a harness repair clears the code.

What to test first

Start at step 1. Each result tells you what it means and where to go next.

  1. Have the airbag codes read with a scan tool that can talk to the airbag module, and note whether B0116 is stored too.

    Low riskTool: scan tool with airbag (SRS) access

    • IfB0111 and/or B0116 is stored

      It meansA side airbag firing circuit is open; check for bulletins on your model.

      Go to step 2

  2. Give your VIN to a Toyota or Lexus dealer and ask which bulletin applies to B0111 on your model.

    Low risk

  3. Have a trained technician follow the service manual's open squib circuit diagnosis.

    Best left to a shopTool: Toyota diagnostic tool and repair manual

    Warning:Never probe airbag connectors or wiring with a test light or meter, and never unplug them yourself. Nissan warns that airbags and pretensioners can still deploy after the ignition is off, and that test equipment must not be used on airbag circuits unless the service manual calls for it. Leave this to a dealer or trained technician.

Symptoms

  • SRS airbag warning light stays on
  • SRS light comes and goes

How to fix

This is a safety-critical system, so we explain the code but don't give repair steps. Have it inspected by a qualified technician.

Parts and cost context

  • Floor wire harness and side airbag circuit:Toyota's bulletins repair the floor harness or fit an updated harness before any airbag is replaced. Airbag work must be done by a trained technician. Labour varies; get a quote.

Labor varies by vehicle and shop; get a quote before you approve a repair.

Compare used part prices on PartPriceGuide

On your vehicle

Toyota

  • 2004–2009 · Sienna

    Supported by vehicle data

    Several Toyota bulletins cover B0111 and B0116 on the Sienna, ending with a procedure to repair the floor harness and side airbag squib circuit. Whether they are still current is not verified.

  • 2006–2008 · 4Runner

    Supported by vehicle data

    Toyota's bulletin announces a new service part for B0111 and B0116. Whether it is still current is not verified.

  • T-SB-0069-12 RevStatus unverified

    SRS lamp on with B0111 and/or B0116

    2004–2009sienna · issued · NHTSA 10131949

    Updated repair procedure: repair the floor harness and the side airbag squib circuit.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

  • EL001-08Status unverified

    SRS light on, B0111/B0116, open side squib circuit

    2004–2008sienna · issued · NHTSA 10024292

    Repair manual supplement for the open side squib circuit. A Lexus version covers the 2004–2008 RX.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

  • TSB-0086-09Status unverified

    SRS light on with B0111/B0116

    2006–20084runner · issued · NHTSA 10029189

    Announces a new service part for this condition.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Lexus

  • 2005–2009 · GX

    Supported by vehicle data

    Lexus's bulletin supplies an updated wire harness for B0111 and B0116. Whether it is still current is not verified.

  • 2004–2008 · RX

    Supported by vehicle data

    Lexus issued a repair manual supplement for B0111 and B0116 (open side squib circuit) on the RX 330, RX 350 and RX Hybrid. Whether it is still current is not verified.

  • LSB-0005-10Status unverified

    SRS light on with B0111/B0116

    2005–2009gx-470 · issued · NHTSA 10033625

    Supplies an updated wire harness.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

  • B0020Airbag firing circuit fault, usually the driver-side seat airbag (varies by maker)

    Same system Common general cause

    B0020 is a firing circuit code that Chrysler and Jeep use for the left side seat airbag. Like B0111, it can come from wiring in the front seat, where Chrysler's bulletin adds a jumper harness.

All Airbags and seat-belt restraints (SRS) codes

B0111 questions

Will the side airbag work with B0111 set?

Don't count on it. The code means the firing circuit is open, and Toyota's manual says the SRS light means a fault that needs inspection right away.

Sources and review

  1. Camry Owner's Manual (OM06291U) — Toyota
  2. EL001-08: repair manual supplement, SRS light on, DTC B0111/B0116, open side squib circuit (Sienna) — Toyota Motor Sales / NHTSA ,
  3. 2023 Accord Owner's Manual: Airbag System Indicators — American Honda Motor Co.
  4. T-SB-0069-12 Rev: SRS lamp on with B0111 and/or B0116; repair the floor harness and side airbag squib circuit (Sienna) — Toyota Motor Sales / NHTSA ,
  5. TSB-0162-10: SRS lamp on with B0111 and/or B0116, updated repair procedure (Sienna) — Toyota Motor Sales / NHTSA ,
  6. LSB-0005-10: SRS light on with B0111/B0116, updated wire harness (GX 470) — Toyota Motor Sales (Lexus) / NHTSA ,
  7. T-SB-0252-08: SRS light on with B0111/B0116, new service part (Sienna) — Toyota Motor Sales / NHTSA ,
  8. TSB-0086-09: SRS light on with B0111/B0116, new service part (4Runner) — Toyota Motor Sales / NHTSA ,
  9. EL001-08: repair manual supplement, SRS light on, DTC B0111/B0116, open side squib circuit (RX 330, RX 350, RX Hybrid) — Toyota Motor Sales (Lexus) / NHTSA ,
  10. Nissan Supplemental Restraint Systems: damage analysis and repair using Diagnostic Trouble Codes (TechNews, Summer 2016) — Nissan North America ,
  11. 10-001-20: airbag warning lamp with B0028-13 and B0020-13; inspect and install front seat jumper harness — FCA US / NHTSA ,
Last reviewed
Written by
Saurabh K.
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