B1785

DTC B1785 Front Occupant Classification Sensor LH Collision Detection

DESCRIPTION

DTC Detection Condition:

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

DTC B1785 is also set when the front seat frame with adjuster RH is subjected to a strong impact, even if an actual accident has not occurred.

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 conducting the zero point calibration and sensitivity check.

Therefore, if DTC B1785 is set, first perform the zero point calibration and sensitivity check.

HINT:
- When DTC B1650/32 is set as a result of troubleshooting the airbag system, perform troubleshooting for DTC B1785 of the occupant classification system.
- Use the intelligent tester or Techstream to check for DTCs of the occupant classification ECU, otherwise the DTCs cannot be read.

Wiring Diagram:

Step 1:

Step 1 (Continued)-4:

Step 4 (Continued)-8:

Step 8 (Continued)-10:

Step 11:

INSPECTION PROCEDURE

NOTE: After the ignition switch is turned OFF, the navigation system requires approximately 90 seconds to record various types of memory and settings. As a result, after turning the ignition switch OFF, wait 90 seconds or more before disconnecting the cable from the negative (-) battery terminal.