SYSTEM DIAGRAM for Front Seat 
 for Rear Seat (w/ Rear Seat Heater) 
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Airbag System(for Gasoline Model): Short in Knee Airbag (D Side) Squib Circuit (B1860-B1863)
DESCRIPTION The driver side knee airbag squib circuit consists of the airbag ECU assembly and lower No. 1 instrument panel airbag assembly. The airbag ECU assembly uses this circuit to deploy the airbag when deployment conditions are met. These DTCs are stored when a malfunction is detected in the d ...
