Network Message Chart
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| Intelligent access system status | RFA module | Provides the BCM with Intelligent Access (IA) key data. The data contains information such as, if an Intelligent Access (IA) key has been detected, how many were detected and if it is a programmed key. It also contains the RFA module ID, which is checked by the BCM . |
| RKE | RFA module | Provides the BCM with which specific programmed Intelligent Access (IA) key was used. |
| Power pack status | PCM | Provides the BCM with the current ignition status of the PCM . |
MODULE NETWORK INPUT MESSAGES - BODY CONTROL MODULE (BCM)
OFF
To enter OFF mode, press the start/stop button without pressing the brake pedal while the vehicle is in ON mode or the engine is running. The Intelligent Access (IA) key does not have to be in the vehicle to achieve OFF mode. However, the Intelligent Access (IA) 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 an Intelligent Access (IA) key is determined. If the Intelligent Access (IA) key is not present, the message center displays Key Not Detected to alert the driver that the Intelligent Access (IA) key is not present.
To enter ON mode, with the correct Intelligent Access (IA) key inside the vehicle, press the start/stop switch for a minimum of one second without pressing the brake pedal. Once the BCM and RFA module indicate the correct Intelligent Access (IA) key is present inside the vehicle and the BCM has detected the start/stop switch input without the BPP input (automatic transmission) or CPP input (manual transmission), the BCM activates the ignition and accessory relays. The BCM also sends the ignition mode message to the other modules over the Medium Speed Controller Area Network (MS-CAN).
Once the ignition has entered ON mode, the indicator in the start/stop switch illuminates and the module controlled indicators in the IPC momentarily illuminate to prove they are functioning correctly. For information on the IPC Prove Out
Refer to: INSTRUMENT PANEL CLUSTER (IPC) - SYSTEM OPERATION AND COMPONENT DESCRIPTION .
START
Once the BCM and RFA module indicate the correct Intelligent Access (IA) key is present inside the vehicle and the BCM has detected the start/stop switch input without the BPP input (automatic transmission) or CPP input (manual transmission), the BCM activates the ignition relay. The BCM also sends the ignition mode message to the other modules over the Medium Speed Controller Area Network (MS-CAN).
The engine can be started from any ignition mode. Once the ignition has entered START mode, the indicator in the start/stop switch illuminates.
Multifunction Switch
The multifunction switch is a multiple position switch controlled by a lever. The multifunction switch controls the turn signal, headlamp low/high beam and headlamp dimmer/flash-to-pass functions. For information on exterior lighting
Refer to: EXTERIOR LIGHTING - SYSTEM OPERATION AND COMPONENT DESCRIPTION .
Steering Wheel Switches
The steering wheel switches are comprised of 2 switch clusters mounted on each side of the steering wheel facing the driver. Each switch cluster contains a 4-way rocker switch, 1-way pull rocker switch and a 5-way directional switch pad.
The 5-way directional switch pad on the left switch cluster controls the message center display. For information on the message center
Refer to: INSTRUMENT PANEL CLUSTER (IPC) - SYSTEM OPERATION AND COMPONENT DESCRIPTION .
The 4-way rocker and 1-way pull rocker switch on the left switch cluster control the cruise control. For information on cruise control
Refer to: CRUISE CONTROL - SYSTEM OPERATION AND COMPONENT DESCRIPTION .
The 5-way directional switch pad on the right switch cluster controls the infotainment display. The 4-way rocker and 1-way pull rocker switch on the right switch cluster controls the SYNC system. For information on infotainment and SYNC
Refer to: INFORMATION AND ENTERTAINMENT SYSTEM - SYSTEM OPERATION AND COMPONENT DESCRIPTION .
Wiper and Washer Switch
The wiper and washer switch is a multiple position switch controlled by a lever. The wiper and washer switch controls the front windshield wipers and washers and the rear window wiper and washer. For information on the front and rear wipers
Refer to: WIPERS AND WASHERS - SYSTEM OPERATION AND COMPONENT DESCRIPTION .
Body Control Module (BCM)
The BCM determines the vehicle ignition mode based on the start/stop switch input, the BPP input (automatic transmission) or CPP input (manual transmission) and RFA module messages. The BCM communicates the ignition mode to the other modules over the Medium Speed Controller Area Network (MS-CAN). The BCM monitors the start/stop switch input and the ignition mode outputs, if a fault is detected in the ignition system, Diagnostic Trouble Codes (DTCs) are set in the BCM . For information on the BCM
Refer to: MODULE CONTROLLED FUNCTIONS - SYSTEM OPERATION AND COMPONENT DESCRIPTION .
Remote Function Actuator (RFA) Module
For information on the RFA module.
Refer to: MODULE CONTROLLED FUNCTIONS - SYSTEM OPERATION AND COMPONENT DESCRIPTION .
Brake Pedal Position (BPP) Switch
The BPP 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 and PCM .
When the normally closed contacts open, the ground circuit to the PCM is momentarily interrupted.
Start/Stop Switch
The start/stop switch is a momentary dual contact switch that is hardwired to the BCM and the PCM .
Both sets of contacts are normally open and receive voltage at all times. When the start/stop switch is pressed, one set of contacts supplies voltage to the BCM only. The second set of contacts supply voltage to the BCM , RFA module and the PCM .
The start/stop switch has an LED , that is used for switch illumination.
No Power in All Ignition Switch Positions - Vehicles with an Ignition Switch
Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: DIAGNOSTIC METHODS .
Refer to SYSTEM WIRING DIAGRAMS for schematic and connector information.
No Power in ACC - Vehicles with an Ignition Switch
Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: DIAGNOSTIC METHODS .
Refer to SYSTEM WIRING DIAGRAMS for schematic and connector information.
No Power in ON - Vehicles with an Ignition Switch
Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: DIAGNOSTIC METHODS .
Refer to SYSTEM WIRING DIAGRAMS for schematic and connector information.
No Power in START - Vehicles with an Ignition Switch
Refer to SYSTEM WIRING DIAGRAMS for schematic and connector information.
Refer to SYSTEM WIRING DIAGRAMS for schematic and connector information.
The Ignition Key Cannot Be Returned to the OFF Position
Refer to SYSTEM WIRING DIAGRAMS for schematic and connector information.
The Ignition Key Can Be Turned to the OFF Position When the Selector Lever is Not in PARK
Refer to SYSTEM WIRING DIAGRAMS for schematic and connector information.