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DTC B1786: Front Occupant Classification Sensor RH Collision Detection: Description

DTC B1786 is output when the occupant classification ECU receives a collision detection signal sent by the front occupant classification sensor RH when an accident occurs.

DTC B1786 is also output when the front seat assembly RH is subjected to a strong impact, even if an actual accident does not occur.

However, when the occupant classification ECU outputs a collision detection signal, even if the vehicle is not in a collision, DTC B1786 can be cleared by performing the zero point calibration and sensitivity check.

Therefore, when DTC B1786 is output, first perform the zero point calibration and sensitivity check.

DTC Code DTC Detection Condition Trouble Area
B1786 When one of following conditions is met:
  • Front seat RH malfunction
  • Occupant classification ECU malfunction
  • Front occupant classification sensor RH detects large load
  • Occupant classification ECU
  • Front seat with adjuster frame assembly RH (Front occupant classification sensor RH)