B1861Driver knee airbag firing circuit open

• Toyota/Lexus code · Airbag (SRS)
• Lights a warning lamp

How the car detects it

The firing circuit of the knee airbag under the steering column is open. For 2006-2008 Lexus IS, Lexus issued a wiring-harness repair for this code. While an airbag fault is stored, the affected airbag or pretensioner may not deploy in a crash. Have it repaired before relying on it. Never probe airbag connectors with a meter: that can fire the airbag.

What you may notice

• SRS (airbag) warning light

Likely causes

• PossibleConnector or wiring at the knee airbag
• RareKnee airbag or airbag control unit

Sources

• static.nhtsa.gov › MC-10155240-9999.pdf · official document
• toyota-club.net › be_srs.htm
• toyota-club.net › be_srs_rav4.htm

Backed by an official manufacturer document.

From Obdaryn's Toyota/Lexus pack, exactly as the app shows it, with the public sources above. Guidance only; confirm with a workshop.