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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 when an accident occurs.

DTC B1788 is also output when the front seat 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 performing the zero point calibration and sensitivity check.

Therefore, when DTC B1788 is output, first perform the zero point calibration and sensitivity check.

DTC TROUBLE DETECTION CHART

DTC No. DTC Detection Condition Trouble Area
B1788 When one of following conditions is met:
  • Front seat RH malfunction
  • Occupant classification ECU malfunction
  • Rear occupant classification sensor RH detects large load
  • Occupant classification ECU
  • Front seat RH (Rear occupant classification sensor RH)