Component Description

Push-Button Start - with Intelligent Access (IA)

Component Description

Body Control Module (BCM)

The BCM (Body Control Module) determines the vehicle ignition mode based on the start/stop switch input, the BPP (Brake Pedal Position) switch input and RFA (Remote Function Actuator) module messages. The BCM (Body Control Module) communicates the ignition mode to the other modules over the MS-CAN (Medium Speed Controller Area Network) and the HS-CAN (High Speed Controller Area Network). The BCM (Body Control Module) monitors the start/stop switch input and the ignition mode outputs, if a fault is detected in the ignition system DTCs (Diagnostic Trouble Codes) are set in the BCM (Body Control Module).

For the BCM (Body Control Module) functions, REFER to Body Control Module (BCM) .

Remote Function Actuator (RFA) Module

REFER to Remote Function Actuator (RFA) .

Brake Pedal Position (BPP) Switch

The BPP (Brake Pedal Position) switch (also known as the stoplamp switch) is a dual contact switch. One set of contacts is normally open and receives voltage at all times. The other set of contacts is normally closed and is connected to ground.

When the normally open contacts close, the voltage is sent to the BCM (Body Control Module), PCM (Powertrain Control Module) and RFA (Remote Function Actuator) module.

When the normally closed contacts open, the ground circuit to the PCM (Powertrain Control Module) is momentarily interrupted.

Start-Stop Switch

The start/stop switch is a momentary contact switch that is hardwired to the RFA (Remote Function Actuator) module, BCM (Body Control Module), and the PCM (Powertrain Control Module). The start/stop switch is connected to both the RFA (Remote Function Actuator) module and BCM (Body Control Module) as a backup in case of a switch or circuit failure. In the event of a switch failure or a circuit failure between the switch and one of the modules, the module that receives the start/stop switch request transmits the request over the MS-CAN (Medium Speed Controller Area Network) to the other module to enable ignition system operation.

The start/stop switch also has 2 LEDs (Light-emitting Diodes), one is used for switch illumination and the other to indicate ignition mode. The ignition mode LED (Light-emitting Diode) only illuminates when the vehicle is in RUN or START mode, it does not illuminate in ACC mode.