B1787 LEXUS – Rear Occupant Classification Sensor Left Collision Detection

B1787 LEXUS Possible Symptoms

Air Bag Warning Light ON

B1787 LEXUS Possible Causes

Faulty Front Seat RH (Rear Occupant Classification Sensor (LH)),Front Seat RH harness is open or shorted,Front Seat RH circuit poor electrical connection,Faulty Occupant Classification ECU

B1787 LEXUS Description

The Diagnostic Trouble Code (DTC) B1787 is output when the Occupant Classification ECU receives a collision detection signal sent by the Rear Occupant Classification Sensor Left (LH) when 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 performing the zero point calibration and sensitivity check. Therefore, when DTC B1787 is output, first perform the zero point calibration and sensitivity check.