Start-Stop Switch

The start/stop switch is a momentary contact switch that is hardwired to the RFA  module, the BCM  , and the PCM  . When the switch is pressed, it signals the RFA  module, the BCM  and the PCM  there is a request to either switch the ignition on or start the engine. The start/stop switch is connected to both modules as a backup in case of a failure. If there is a circuit failure to either module from the start/stop switch, the modules communicate the start/stop switch request to each other over the MS-CAN  .