Description And Operation

Courtesy of CHRYSLER GROUP, LLC

DESCRIPTION 

The Electronic Shift Module (ESM) is part of the shifter assembly called the Shift Lever Assembly (SLA). If it is necessary to service the ESM, the entire shifter must be replaced.

OPERATION 

• The shifter assembly incorporates an electronic control module called an Electronic Shifter Module (ESM). The ESM communicates with the Transmission Control Module (TCM) and other modules on the Controller Area Network (CAN) C Bus.
• The ESM is connected to the vehicle wire harness with a single 12 way connector located at the shifter.
• The ESM can set Diagnostic Trouble Codes (DTCs) when a fault is detected.
• The ESM processes the up/downshift requests when operating in manual mode and communicates the request to the TCM.
• The ESM processes requests from the TCM to open or close the Brake Transmission Shifter Interlock (BTSI) solenoid located in the shifter.