Inspection Procedure 3: Brake warning light stays ON with the parking brake lever released: Notes

WARNING: This page is about a different car, the 2015 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Brake Fluid Level Switch And Parking Brake Switch - Circuit Diagram

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

CAUTION:

If there is any problem in the CAN bus lines, an incorrect DTC may be set. Prior to this diagnosis, diagnose the CAN bus lines (Refer to CAN BUS LINE DIAGNOSTIC FLOW ).
Whenever ECU is replaced, ensure that the CAN bus lines are normal.