Multifunction Electronic Modules: Other Ford C-MAX II

Body Control Module

The BCM controls

1. Battery saver function
2. Brake shift interlock
3. Delayed accessory function
4. Dimmable backlighting
5. Exterior lighting
6. Horn
7. Ignition state messaging
8. Interior lighting
9. Liftgate release
10. PATS (without push-button start)
11. Perimeter alarm
12. Post crash alert function
13. Power door locks (vehicles without door module)
14. Rear window defrost
15. TPMS
16. Transport mode
17. Wiper and washers

Remote Function Actuator Module

The RFA module controls

1. Passive entry system function
2. PATS (with push-button start)

Battery Saver

The battery saver feature is used to save battery voltage. The BCM provides automatic shut-off of the interior lamps after a time-out period when the ignition is off.

Refer to: INTERIOR LIGHTING - SYSTEM OPERATION AND COMPONENT DESCRIPTION .

Battery Load Shed

The BCM uses the battery monitoring sensor to keep track of the battery state of charge in order to save the remaining battery charge when necessary.

Refer to: CHARGING SYSTEM - SYSTEM OPERATION AND COMPONENT DESCRIPTION .

Post Crash Alert Function

The post crash alert is a function controlled by the BCM . If the RCM determines an impact of enough severity has occurred (the air bags may or may not be deployed), the post crash alert function activates.

The post crash alert function

1. sounds the horn.
2. turns on the interior lights.
3. unlocks the doors.
4. turns off the wipers, if on.

The post crash alert function can be turned off by

1. pressing the hazard flasher lamp switch (which may need to be pressed twice).
2. pressing the transmitter unlock button.
3. pressing the RKE transmitter PANIC button.

Field Effect Transistor (FET) Protection

A Field Effect Transistor (FET) is a type of transistor that, when used with module software, monitors and controls current flow on module outputs. The Field Effect Transistor (FET) protection strategy prevents module damage in the event of excessive current flow.

The BCM utilizes a Field Effect Transistor (FET) protective circuit strategy for many of its outputs (for example, a headlamp output circuit). Output loads (current level) are monitored for excessive current (typically short circuits) and are shut down (turns off the voltage or ground provided by the module) when a fault event is detected. A short circuit DTC is stored at the fault event and a cumulative counter is started.

When the demand for the output is no longer present, the module resets the Field Effect Transistor (FET) circuit protection to allow the circuit to function. The next time the driver requests a circuit to activate that has been shut down by a previous short (Field Effect Transistor (FET) protection) and the circuit is still shorted, the Field Effect Transistor (FET) protection shuts off the circuit again and the cumulative counter advances.

When the excessive circuit load occurs often enough, the module shuts down the output until a repair procedure is carried out. Each Field Effect Transistor (FET) protected circuit has 3 predefined levels of short circuit tolerance based on the harmful effect of each circuit fault on the Field Effect Transistor (FET) and the ability of the Field Effect Transistor (FET) to withstand it. A module lifetime level of fault events is established based upon the durability of the Field Effect Transistor (FET). If the total tolerance level is determined to be 600 fault events, the 3 predefined levels would be 200, 400 and 600 fault events.

When each tolerance level is reached, DTC U1000:00 should set along with the short circuit DTC that was stored on the first failure. These Diagnostic Trouble Codes (DTCs) cannot be cleared until the vehicle is repaired.

After the repair, it is necessary to clear the Diagnostic Trouble Codes (DTCs). Use the clear DTC operation on the scan tool, cycle the ignition, and run the BCM on-demand self-test.

The module never resets the fault event counter to zero and continues to advance the fault event counter as short circuit fault events occur. If the number of short circuit fault events reach the third level, DTC U3000:49 sets along with the associated short circuit DTC . DTC U3000:49 cannot be cleared and the module must be replaced after the initial fault is repaired.

Gateway Function

The BCM acts as a gateway module by receiving information in one format and transmitting it to other modules using another format. For example, the BCM receives the vehicle speed data from the RCM over the HS-CAN , converts the data into a MS-CAN message and sends (gateways) the message to other network modules such as the IPC module. This enables network communication between modules that do not communicate using the same network ( HS-CAN or MS-CAN ).

Note. The gateway module, BCM and IPC have gateway functionality.

Transport Mode

During vehicle build, some modules (such as the IPC and the BCM ) are set to factory mode. When the vehicle build is complete, the vehicle is set to transport mode.

Transport mode is used to reduce the drain on the battery during longer periods when the vehicle is not used. Various system functions can be altered or disabled when in the transport mode. While in transport mode, the IPC displays TRANSPORT MODE in the message center. Transport mode can be disabled and placed into normal operation mode.

Refer to: TRANSPORT AND FACTORY MODE DEACTIVATION .

BCM

The BCM is a multifunction module that requires a PMI when replaced.

Refer to: MODULE CONFIGURATION - SYSTEM OPERATION AND COMPONENT DESCRIPTION .

RFA

The RFA module is a multifunction module that requires a PMI when replaced.

Refer to: MODULE CONFIGURATION - SYSTEM OPERATION AND COMPONENT DESCRIPTION .

DDM or PDM

The DDM and PDM control the operation of the power door locks, power windows, and the exterior rear view mirrors. They communicate with each other, the BCM , and other modules over the MS-CAN . They also send commands and receive feedback from the Driver Rear Door Module (DRDM) and Passenger Rear Door Module (PRDM) over a private LIN for each module.

1. Refer to: «HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS - SYSTEM OPERATION AND COMPONENT DESCRIPTION»(ref-635198-S31843314622014070200000) .
2. Refer to: «GLASS, FRAMES AND MECHANISMS - SYSTEM OPERATION AND COMPONENT DESCRIPTION»(ref-635259-S18457831282014070200000) .
3. Refer to: «REAR VIEW MIRRORS - SYSTEM OPERATION AND COMPONENT DESCRIPTION»(ref-635258-S23475169472014070200000) .

The DDM and PDM do not require PMI when replaced.

Driver Rear Door Module (DRDM) or Passenger Rear Door Module (PRDM)

The Driver Rear Door Module (DRDM) and Passenger Rear Door Module (PRDM) control the operation of the power door locks and power windows in the rear doors. They receive commands and send feedback with the corresponding DDM or PDM over a private LIN for each module.

The Driver Rear Door Module (DRDM) and Passenger Rear Door Module (PRDM) do not require PMI when replaced.

Possible Sources

1. Wiring, terminals or connectors
2. PCM
3. SOBDMC / TCM
4. BCM

1. Communication network concern
2. PCM
3. BCM

1. Communication network concern
2. Battery voltage concern
3. TCM
4. BCM

1. Communication network concern
2. Battery voltage concern
3. BCM
4. ABS Module

1. Communication network concern
2. Battery voltage concern
3. PSCM
4. BCM

1. Communication network concern
2. Battery voltage concern
3. RCM
4. BCM

1. Communication network concern
2. Battery voltage concern
3. IPC
4. BCM

1. Communication network concern
2. Battery voltage concern
3. HVAC module
4. BCM

1. Communication network concern
2. Battery voltage concern
3. DDM
4. BCM

1. Communication network concern
2. Battery voltage concern
3. PDM
4. BCM

1. Communication network concern
2. Battery voltage concern
3. RFA module
4. BCM

1. Communication network concern
2. Battery voltage concern
3. RGTM
4. BCM

1. BCM output circuit short
2. BCM

1. Fuse
2. Wiring, terminals or connectors
3. Charging system concern
4. Battery concern
5. BJB
6. BCM

1. Charging system
2. BCM

1. Wiring, terminals or connectors
2. BJB
3. BCM

1. Wiring, terminals or connectors
2. BCM

1. BCM
2. RFA module

1. Wiring, terminals or connectors
2. Battery
3. Generator
4. PCM
5. RFA module

Deactivation