Toyota Sienna 2011–2014 — technical service bulletin
Bulletin E0N_LSC_Dealer L · NHTSA communication 10132794 · issued Jun 4, 2014
Technical service bulletin
communication type
Forward Collision Avoidance
component
2011–2014
model years
4
vehicle entries
Official summary
Dealer Letter: The Pre-Collision System (PCS) uses a radar sensor to determine the possibility of a frontal collision. FCC regulations require the radar sensor to be temporarily inactive while the vehicle is stopped. Due to a program error in the Driving Support ECU, if the radar sensor is inactive for 10 seconds or more, the PCS may not reactivate on certain 2011-2014 Model Year Sienna vehicles equipped with PCS.
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.