Module, Electronic Shift (ESM): Operation

WARNING: This page is about a different car, the 2017 Dodge Charger. However, it is still accessible from the selected car via links, so may be relevant.

The E-Shifter assembly incorporates an electronic control module called an ESM. The ESM communicates with the TCM and other modules on the Controller Area Network (CAN) C Bus. There is also a CAN DPT (Dedicated Powertrain) bus that is used only by the ESM and TCM. If one CAN bus is faulted, the other CAN bus transmits and receives the information required for uninterrupted operation.

The ESM can set Diagnostic Trouble Codes (DTCs) when a fault is detected. The E-shifter assembly backlighting can also indicate a fault by flashing the gear selection indicator on and off or turning it off completely.

The Electronic Shifter (E-Shifter) offers (P, R, N, D, M) modes of function. The M selection (manual mode) is engaged by moving the shift-lever sideways to M. Requests to up/down shift are achieved by moving the lever fore/aft once in the manual position.

The shifter knob (or handle) is the only serviceable part of the Shifter assembly.