System Operation

Push-Button Start - with Intelligent Access (IA)

System Operation

System Diagram





Network Message Chart

Module Network Input Messages - BCM (Body Control Module)






OFF

To enter OFF mode, press the start/stop button without pressing the brake pedal while the vehicle is in ACC mode, RUN mode or while the engine is running. The IA (Intelligent Access) key does not have to be in the vehicle to achieve OFF mode. However, the IA (Intelligent Access) key must be present to achieve any other ignition mode.

When the engine is running and any one of the vehicle doors is opened and then closed, the RFA (Remote Function Actuator) module transmits a radio frequency to activate the IA (Intelligent Access) key. If present, the IA (Intelligent Access) key transmits a radio frequency signal to the TPM (Tire Pressure Monitor) module. The TPM (Tire Pressure Monitor) module sends a message to the RFA (Remote Function Actuator) module indicating that the IA (Intelligent Access) key is present.

If the IA (Intelligent Access) key is not present, the message center displays NO KEY DETECTED to alert the driver that the IA (Intelligent Access) key is not present.

If the IA (Intelligent Access) key is not present while attempting to enter OFF mode, the message center displays RESTART NOW OR KEY IS NEEDED. The driver then has up to 20 seconds to restart the vehicle without an IA (Intelligent Access) key being present in the vehicle.

Acc

To enter ACC mode, with the correct IA (Intelligent Access) key inside the vehicle, press and release the start/stop switch one time without pressing the brake pedal. Once the BCM (Body Control Module) receives the message from the RFA (Remote Function Actuator) module that the correct IA (Intelligent Access) key is present inside the vehicle and the BCM (Body Control Module) has detected the start/stop switch input without the BPP (Brake Pedal Position) input, the BCM (Body Control Module) activates the RUN/ACC bus and RUN/ACC relay. The BCM (Body Control Module) also sends the ignition mode message to the other modules over the MS-CAN (Medium Speed Controller Area Network) and the HS-CAN (High Speed Controller Area Network).

Once the ignition has entered ACC mode, the message center displays, PRESS BRAKE TO START and then ACCESSORY POWER ACTIVE.

RUN

To enter RUN mode, with the correct IA (Intelligent Access) key inside the vehicle, press the start/stop switch for a minimum of one second without pressing the brake pedal. Once the BCM (Body Control Module) receives the message from the RFA (Remote Function Actuator) module that the correct IA (Intelligent Access) key is present inside the vehicle and the BCM (Body Control Module) has detected the start/stop switch input without the BPP (Brake Pedal Position) input, the BCM (Body Control Module) activates the RUN/ACC bus, the RUN/START bus, the RUN/ACC relay and the RUN/START relay. The BCM (Body Control Module) also sends the ignition mode message to the other modules over the MS-CAN (Medium Speed Controller Area Network) and the HS-CAN (High Speed Controller Area Network).

Once the ignition has entered RUN mode, the indicator in the start/stop switch illuminates and the module controlled indicators in the IPC (Instrument Panel Cluster) momentarily illuminate to prove they are functioning correctly. For information on IPC (Instrument Panel Cluster) prove out, REFER to Prove-Out .

Start

To enter START mode, with the correct IA (Intelligent Access) key inside the vehicle, press and hold the brake pedal, then press and release the start/stop switch. Once the BCM (Body Control Module) receives the message from the RFA (Remote Function Actuator) module that the correct IA (Intelligent Access) key is present inside the vehicle and the BCM (Body Control Module) has detected the BPP (Brake Pedal Position) input with the start/stop switch input, the BCM (Body Control Module) activates the RUN/START bus and the RUN/START relay. The BCM (Body Control Module) also sends the ignition mode message to the other modules over the MS-CAN (Medium Speed Controller Area Network) and the HS-CAN (High Speed Controller Area Network).

The engine can be started from any ignition mode. Once the ignition has entered START mode, the indicator in the start/stop switch illuminates.