Lincoln Corsair: Glass, Frames and Mechanisms / Description and Operation - Glass, Frames and Mechanisms - System Operation and Component Description

System Operation

System Diagram - Power Windows

Driver Side Power Windows

Passenger Side Power Windows

Network Message Chart - Power Windows

  Passenger Door Module (PDM) Network Input Messages

System Diagram - Rear Window Defrost

Network Message Chart - Rear Window Defrost

  BCMC Network Input Messages

Delayed Accessory Feature

Voltage is supplied to the power window system by the demand relay, located in BCM . The demand relay is integral to the BCM and not serviceable separately. The BCM activates the demand relay whenever the ignition is ON, or whenever the ignition is changed from ON to OFF while the LH and RH front doors are closed.

The BCM deactivates the demand relay when:

• the LH or RH front door is ajar and the ignition is OFF.
• ten minutes have elapsed since the ignition status has changed from ON to the OFF position.

Front Power Window Operation

NOTE: If the vehicle battery is disconnected while the window is moving, the one-touch up feature (and obstacle detection) is disabled prior to initialization.

Refer to: Power Door Window Initialization (501-11 Glass, Frames and Mechanisms, General Procedures).

The power windows operate when the delayed accessory feature is active. Both front windows are equipped with obstacle detection and one-touch up and one-touch down functionality. If an obstacle has been detected in the window opening as the window glass is moving upward, the window motor automatically reverses direction and moves the glass downward.

Driver Side Front Window Operation

The driver window control switch communicates to the DDM through a private LIN . When commanded by the driver window control switch, the DDM supplies power and ground to operate the driver front window regulator motor in the desired direction. The DDM monitors fluctuations of the motor current (ripple count for DC motors) to determine the window glass position.

Passenger Side Front Window Operation

The driver window control switch communicates to the DDM through a private LIN . The DDM communicates to the PDM through the MS-CAN . When commanded by the driver window control switch or the passenger front door window control switch, the PDM supplies power and ground to operate the passenger front window regulator motor in the desired direction. The PDM monitors fluctuations of the motor current (ripple count for DC motors) to determine the window glass position.

Rear Power Window Operation

NOTE: If the vehicle battery is disconnected while the window is moving, the one-touch up feature (and obstacle detection) is disabled prior to initialization.

Refer to: Power Door Window Initialization (501-11 Glass, Frames and Mechanisms, General Procedures).

The rear power windows operate when the delayed accessory feature is active. Both rear windows are equipped with obstacle detection and one-touch up and one-touch down functionality. If an obstacle has been detected in the window opening as the window glass is moving upward, the window motor automatically reverses direction and moves the glass downward.

Driver Side Rear Window Operation

The driver window control switch communicates to the DDM through a private LIN . The rear door window control switch is wired directly to the DDM . When commanded by the driver window control switch or the rear door window control switch, the DDM supplies power and ground to operate the driver rear window regulator motor in the desired direction. The DDM monitors fluctuations of the motor current (ripple count for DC motors) to determine the window glass position.

Passenger Side Rear Window Operation

The driver window control switch communicates to the DDM through a private LIN . The DDM communicates to the PDM through the MS-CAN . The rear door window control switch is wired directly to the PDM . When commanded by the driver window control switch or the rear door window control switch, the PDM supplies power and ground to operate the passenger rear window regulator motor in the desired direction. The PDM monitors fluctuations of the motor current (ripple count for DC motors) to determine the window glass position.

Rear Passenger Windows Lock-Out

When the lock-out switch (part of the driver window control switch) is in the LOCK position, the rear passenger power windows only operate from the driver window control switch.

Rear Window Defrost

The rear window defrost system only operates when the engine is running. When the rear window defrost switch is activated, the FCIMB sends the request message to the BCM and then through a LIN to the BJB . The BJB activates the rear window defrost relay (integral to the BJB ). When the rear window defrost relay is activated, the rear window defrost grid(s) are energized. In some cases, the rear window defrost system may automatically activate as an extra load for accelerated engine warm-up. However the rear window defrost status LED remains off unless the rear window defrost switch is activated.

The BJB deactivates the rear window defrost relay when any of these conditions is met:

• The rear window defrost switch is pressed when the feature is active.
• Ignition state is changed from on to off.
• A predetermined timer completes.
• Battery voltage has dropped below a specified threshold (load management strategy).

Component Description

Component Description

Driver Window Control Switch

The driver window control switch receives voltage whenever the accessory delay relay is active. The driver window control switch communicates to the DDM through a private LIN .

Front Passenger Door Window Control Switch

The front passenger door window control switch contains momentary contacts (one for each window switch direction). The PDM provides a return (ground) for the front passenger door window control switch. When the control switch is activated, a ground signal is supplied to the PDM to operate the window regulator motor in the desired direction.

Rear Passenger Door Window Control Switch

Each of the rear passenger door window control switches contain momentary contacts (one for each window switch direction). The DDM or PDM provides a return (ground) for the rear passenger door window control switch. When the control switch is activated, a ground signal is supplied to the DDM or PDM to operate the window regulator motor in the desired direction.

Window Regulator Motor

The window regulator motor(s) are bi-directional. Window direction is determined by the polarity of the voltage being supplied to the motor from the associated door module.

Driver Door Module (DDM)

The DDM receives power window commands from the driver window control switch. The DDM supplies voltage and ground to operate the driver front and rear passenger door window regulator motor.

The DDM also communicates driver window control switch requests to the PDM through the MS-CAN . PMI is required whenever installing a new module.

Passenger Door Module (PDM)

The PDM receives power window commands from the passenger front window control switch or from the DDM through the MS-CAN . The PDM supplies voltage and ground to operate the passenger front and rear door regulator window motors. PMI is required whenever installing a new module.

BCM

When a rear window defrost request message is sent to the BCM , the BCM sends a request to the BJB through a LIN to activate the rear window defrost system. PMI is required whenever installing a new module.

FCIMB

The FCIMB module contains the rear window defrost switch. PMI is required whenever installing a new module.