ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT HOOD SUB-ASSEMBLY (a) Check that the clearance measurements of areas A to D are within the standard range. 
Standard Clearance:
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Toyota Tundra Service Manual > Occupant Classification System: Front Occupant Classification Sensor LH Collision Detection (B1785)
DESCRIPTION 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 actua ...
