Jeep Grand Cherokee 2011–2013 — technical service bulletin
Bulletin 21-001-14 · NHTSA communication 10136946 · issued Feb 6, 2014
Technical service bulletin
communication type
Electrical System
component
2011–2013
model years
3
vehicle entries
Official summary
Flash: ELSD Module Enhancements This bulletin involves selectively erasing and reprogramming the Electronic Limited Slip Differential (ELSD) with new software. If any of the following DTC?s are either Active or Stored in the ELSD module?s memory, the ELSD motor will need to be replaced as well. C1490-00-REAR DIFFERENTIAL ACTUATOR INITIALIZATION FAILURE C148F-1D-REAR DIFFERENTIAL MEASURED MOTOR - CIRCUIT OUT OF RANGE C1489-96-REAR DIFFERENTIAL MOTOR BRAKE - COMPONENT INTERNAL FAILURE The customer may indicate that their 4X4 lamp may be flashing (indicating a malfunction of the 4X4 system).In ad
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.