Subaru Crosstrek 2014–2016 — technical service bulletin
Bulletin 11-185-18 · NHTSA communication 10153212 · issued Nov 27, 2018
Technical service bulletin
communication type
Electrical System
component
2014–2016
model years
3
vehicle entries
Official summary
This bulletin announces availability of reprogramming files to optimize the Battery Energy Control Unit (BECU) which is a component part of the HEV battery pack. The new files address the BECU logic used for detection of the HEV battery pack temperature. After the engine is shut off, the battery pack generates a certain amount of self-discharge heat by design. Existing BECU logic uses a threshold for the amount of this heat which is too low. As a result, the Hybrid Motor Assist Regeneration (HEV battery recharge) system and Auto Start Stop features stop operating. In addition to these reprogra
Vehicles covered
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.