ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT REAR BODY TAIL GATE ASSEMBLY (a) Check that the clearance measurements of areas A to B are within the standard range. 
Standard measurement:
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Toyota Tundra Service Manual > Pre-collision System: Stop Light Relay Circuit (C1A4B)
DESCRIPTION The skid control ECU (brake actuator assembly) sends a stop light operation request signal to the stop light relay (stop light switch assembly). If the skid control ECU (brake actuator assembly) detects a malfunction in the stop light relay circuit, the millimeter wave radar sensor assem ...
