Network Message Chart - Push Button Start
Module Network Input Messages - Body Control Module (BCM)
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| Intelligent access system status | RFA module | Provides the BCM with the passive key data. The data contains information such as if a passive key has been detected, how many were detected and if it is a programmed passive key. It also contains the RFA module ID, which is checked by the BCM. |
| RKE | RFA module | Tells the BCM which programmed passive key is in use. |
| Power pack status | PCM | Provides the BCM with the current ignition status of the PCM. |
OFF
To enter OFF mode, press the ignition switch without pressing the brake pedal while the vehicle is in ON mode or the engine is running. The passive key does not have to be in the vehicle to achieve OFF mode. However, the passive 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 presence of a passive key is determined. If the passive key is not present, the message center displays Key Not Detected to alert the driver the passive key is not present.
When the ignition switch is turned to the OFF position, the BCM communicates the state of the ignition to the other modules by sending an ignition status message over the Medium Speed Controller Area Network (MS-CAN).
ON
To enter ON mode, with a valid passive key inside the vehicle, press the ignition switch for a minimum of one second without pressing the brake pedal. Once the BCM and RFA module indicate a valid passive key is present inside the vehicle and the BCM has detected the ignition switch input without the BPP switch input, the BCM activates the ignition and accessory relays, providing ignition power to the various vehicle systems and modules. The BCM communicates the state of the ignition to the other modules by sending an ignition status message over the Medium Speed Controller Area Network (MS-CAN) and a power mode message over the High Speed Controller Area Network (HS-CAN). The BCM also sends a power system status message to the IPC over the Medium Speed Controller Area Network (MS-CAN) to momentarily illuminate the module controlled indicators to prove they are functioning correctly. For IPC prove-out information, Refer to: Instrument Panel Cluster (IPC) - Overview .
START
To enter START mode, with a valid passive key inside the vehicle, press and hold the brake pedal, then press and release the ignition switch. Once the BCM and RFA module indicate a valid passive key is present inside the vehicle and the BCM has detected the ignition switch input with the BPP switch input, the BCM activates the ignition and accessory relays, providing ignition power to the various vehicle systems and modules. The BCM communicates the state of the ignition to the other modules by sending an ignition status message over the Medium Speed Controller Area Network (MS-CAN) and a power mode message over the High Speed Controller Area Network (HS-CAN). The BCM also sends a power system status message to the IPC over the Medium Speed Controller Area Network (MS-CAN) to momentarily illuminate the module controlled indicators to prove they are functioning correctly. For IPC prove-out information, Refer to: Instrument Panel Cluster (IPC) - Overview .
The engine can be started from any ignition mode. Once the ignition has entered START mode, the indicator in the ignition switch illuminates.