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DTC B1788 Rear Occupant Classification Sensor RH Collision Detection: Description

DTC B1788 is output when the occupant classification ECU receives a collision detection signal sent by the rear occupant classification sensor RH if an accident occurs.

DTC B1788 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 B1788 can be cleared by "Zero point calibration" and "Sensitivity check".

Therefore, if DTC B1788 is output, first perform "Zero point calibration" and "Sensitivity check".

REAR OCCUPANT CLASSIFICATION SENSOR RH COLLISION DETECTION

DTC No. DTC Detection Condition Trouble Area
B1788
  • Front seat back assembly RH malfunction
  • Occupant classification ECU malfunction
  • Rear occupant classification sensor RH detected a large load
  • Front seat back assembly RH (Rear occupant classification sensor RH)
  • Occupant classification ECU