DTC B1785 Front Occupant Classification Sensor LH Collision Detection: Description

DTC B1785 is output when the occupant classification ECU receives a collision detection signal sent by the front occupant classification sensor LH if an accident occurs.

DTC B1785 is also output when the front seat adjuster frame 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 B1785 can be cleared by "zero point calibration" and "sensitivity check".

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

DTC DETECTING CONDITION CHART

DTC No.	DTC Detecting Condition	Trouble Area
B1785	Front seat assembly RH malfunction Occupant classification ECU malfunction Front occupant classification sensor LH sensed large load	Occupant classification ECU Front seat assembly RH (Front occupant classification sensor LH)

HINT:

When DTC B1650/32 is detected as a result of troubleshooting for "AIRBAG SYSTEM", check the DTCs stored in the occupant classification ECU. When DTC B1785 is output, perform troubleshooting for the DTC.