How do I diag the center airbag sensor assembly?

What year is this Yaris?

there is a TSB available if you're under 60,000 miles take it the dealer.

light occurs when:The center airbag sensor assembly receives an open circuit signal in the side squib (front passenger side) circuit for 2 seconds.

possible trouble areas include:Front seat airbag assembly RH (side squib (front passenger side)), Center airbag sensor assembly, & No. 2 floor wire.

air bags
get the bags scanned,
read the FSM on bags yet< (factory service manual)
or at alldata.com, DIY.
in what country? , did you read the TSB recall yet>?????
huge recall.
where is this 31 code? at>?
Trouble Code: B1000/31 (1.8L L4 VIN R Auto)
Airbag ECU Malfunction * Airbag sensor assy center

remove battery neg lug before touching any SRS parts.
B1000/31; Center Airbag Sensor Assembly Malfunction (2006 Corolla From 07/2005) DESCRIPTION The center airbag sensor assembly consists of a deceleration sensor, safing sensor, drive circuit, diagnosis circuit, ignition control, etc.
If the center airbag sensor assembly receives signals from the deceleration sensor, it determines whether or not the SRS should be activated.
DTC B1000/31 is recorded when a malfunction is detected in the center airbag sensor assembly.

If only DTC B1000/31 is output, do not clear the DTCs, replace the center airbag sensor assembly.
If any DTCs other than DTC B1000/31 are also output, troubleshoot those DTCs first.


use a real scan tool
and see all errors.
if not you guess wrong.

B1100-Airbag Sensor Assembly Malfunction
B0108 -Short In P Side Air Bag Squib Circuit

check passenger side air bag connector is correctly connected

did you google(using toyota directives>?)

Air bags bad.
get the FSM and read every word and the extreme dangers messing here.
no year stated
no model car. no car actually stated? wow.
no country. SSDD.
ok go to alldata.com and read.
or buy the FSM.
Squib is the explosive device, is faulting.
a squib means a low power explosive.
used in big guns to test fire , or clear a barrel or for parades ,etc.
name was stolen to car industry.
in Viet Nam we called it a short round ( it was , short)
in the car they are shot gun load sizes, and are to be respected at all times. killed many a would be mechanic.

the bad reads open circuit , or the wire is cut or the connector bad
or the bag is SHOT.
random toy , i guessed for you .
http://library.worldtracker.org/Car%20Manuals/Toyota%20Echo%202000-2002%20Approved/techinfo.toyota.com/ileaf/02toyrm/02toypdf/02rmsour/2002/02echorm/di/rs/cib01065.pdf


FSM , DTC index list
Trouble Code Conditions:
* Open circuit in P squib wire harness or P- wire harness of squib * P squib malfunction * Airbag sensor assembly malfunction
Possible Causes:

• *Front passenger airbag assembly (P squib)
• * Airbag sensor assembly
• * Wire harness

tread lightly fooling with air bags or BOOM.

It sounds like you have a bad clock spring unit located behind the steering wheel.What are the OBD11 codes.You have to be very carfull when servicing Air Bag systems you can set off the air bag and hurt yourself with static elec spark.

lett side seat thorax squib 1 circuit open

The 'passenger side squib circuit' is the wiring that goes from the center airbag computer (under the center console) to the passenger side airbag.

http://s28.photobucket.com/albums/c216/thomaspedemon/toyota%20celia%20airbag/
complete diag chart copy and paste link code is for open circuit to squib