Body, generic

B00CA Passenger Seat Occupant Position Sensor D

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

B00CA is position input D, the fourth for the passenger seat. Its use is not documented by any carmaker. Optical sensing is one way to fill such a slot: a patent family of Automotive Technologies International, going back to 1995, places imagers with infrared lighting at the A-pillar, in the headliner or on top of the dashboard, two arrays spaced apart for depth, and calls an occupant out of position once head or chest come within about 5 inches of the airbag door. Pattern recognition separates a rear-facing child seat from a person, and the authors judge ultrasound with roughly 10 ms per update as too slow for tracking during a crash. For the passenger, FMVSS 208 permits dynamic suppression and prescribes no method. With B00CA stored, that view is lost and the airbag warning shows.

Likely causes

Lead to sensor D damaged at the pillar, headliner or dashboard after trim or glass work
Sensor view blocked or lens dirty, for example by stickers or accessories
Internal fault of position sensor D

Symptoms

  • Airbag warning lamp on
  • Out-of-position suppression for the passenger no longer available
  • Safety note: airbag system; work at pillar, headliner or dashboard only de-energised (ignition off, battery off, wait time), recheck sensor alignment afterwards, specialist workshop only

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–1,000
Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

passenger occupant position sensor dsrs roof wiringoccupant position module

Related codes

B00C9B00CBB00A1B00BA

References: patents.google.com, law.cornell.edu.