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DTC B1785: Front Occupant Classification Sensor LH Collision Detection [03/2019 - ]: Description

DTC B1785 is stored when the occupant detection ECU receives a collision detection signal sent by the front occupant classification sensor LH in the case of an accident.

DTC B1785 is also stored when the front seat assembly RH is subjected to a strong impact, even if an actual accident did not occur.

If the vehicle was not in a collision, but the occupant detection ECU receives a collision detection signal and stores DTC B1785, the DTC can be cleared by performing zero point calibration and sensitivity check.

Therefore, if DTC B1785 is output, first perform zero point calibration and sensitivity check.

DTC No. Detection Item DTC Detection Condition Trouble Area
B1785 Front Occupant Classification Sensor LH Collision Detection
  • Front occupant classification sensor LH sensed large load.
  • Front seat adjuster assembly RH malfunction
Front occupant classification sensor LH (Front seat adjuster assembly RH)*
  1. *: The front occupant classification sensor LH is built into the front seat adjuster assembly RH.