B1787

DTC B1787 Rear Occupant Classification Sensor LH Collision Detection

DESCRIPTION

DTC Detecting Condition:

DTC B1787 is output when the occupant classification ECU receives a collision detection signal sent by the rear occupant classification sensor LH if an accident occurs.

DTC B1787 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 B1787 can be cleared by "Zero point calibration" and "Sensitivity check". Therefore, if DTC B1787 is output, first perform "Zero point calibration" and "Sensitivity check".

Wiring Diagram:

Step 1-3:

Step 3(continued)-7:

Step 7(continued)-10:

INSPECTION PROCEDURE

HINT:
- If troubleshooting (wire harness inspection) is difficult to perform, remove the front passenger seat installation bolts to see the under surface of the seat cushion.
- In the above case, hold the seat so that it does not fall down. Holding the seat for a long period of time may cause a problem, such as seat rail deformation. Hold the seat only as necessary.