Lincoln Navigator: Rear View Mirrors / Rear View Mirrors - System Operation and Component Description. Description and Operation

System Operation

System Diagram - Exterior, Memory

E342575 *.sttxt { visibility: hidden; } *.stcallout { visibility: visible; } 1 Motors 2 Motors 3 LH Exterior Mirror 4 RH Exterior Mirror 5 Position Sensor 6 Position Sensor 7 Extrerior Mirror Control Switch 8 DDM 9 PDM 10 DSM 11 LH Front Window Control Switch

Item	Description
1	Motors
2	Motors
3	LH Exterior Mirror
4	RH Exterior Mirror
5	Position Sensor
6	Position Sensor
7	Extrerior Mirror Control Switch
8	DDM
9	PDM
10	DSM
11	LH Front Window Control Switch

Network Message Chart

  Module Network Input Messages — PDM

Broadcast Message	Originating Module	Message Purpose
Passenger mirror command	DDM	Contains the movement requests for the RH exterior mirror glass generated by the exterior mirror control switch.

  Module Network Input Messages — DDM and PDM

Broadcast Message	Originating Module	Message Purpose
Memory command	DSM	Commands the door modules to initiate a memory save or recall and is used to abort a memory recall that is in progress.

System Operation - Exterior, Memory

When a memory recall or save is initiated, the DSM sends the memory command message to the DDM and PDM through the MS-CAN . Based on this message, the DDM and PDM recall the requested memory preset mirror position from internal memory or save the current mirror position to correspond with the requested preset. During a memory recall, the DDM and PDM supply voltage and ground to the appropriate exterior mirror motors to achieve the desired memory positions that are stored in memory based on feedback from the mirror motor potentiometers. If the exterior mirror control switch is activated in any direction during a memory recall, the DDM sends the manual mirror override message to the DSM . After this message is received, the DSM sends the memory command message to abort the memory recall. After the recall is aborted, the DDM or PDM respond to the exterior mirror control switch inputs. A memory recall is also aborted if the driver seat control switch is activated in any direction during a memory recall.

The LH exterior mirror glass position memory presets are stored in the DDM and the RH exterior mirror glass position memory presets are stored in the PDM .

A memory recall or memory save can be initiated by the memory set switch, RKE transmitter or Intelligent Access (IA) key (if equipped) or the keyless entry keypad. For additional information on memory recall or memory save, refer to the Owner's Literature.

For additional information on the memory feature,
Refer to: Front Seats - System Operation and Component Description (501-10A Front Seats, Description and Operation).

System Diagram - Exterior, Heated

E342576 *.sttxt { visibility: hidden; } *.stcallout { visibility: visible; } 1 FCIM 2 RH Heated Mirror 3 LH Heated Mirror 4 Rear Window Defrost Relay

Item	Description
1	FCIM
2	RH Heated Mirror
3	LH Heated Mirror
4	Rear Window Defrost Relay

System Operation - Exterior, Heated

Based on the Mirror Heat Request message received from the FCIM through the MS-CAN , the DDM controls the operation of the LH heated exterior mirror glass and the PDM controls the operation of the RH heated exterior mirror glass. On vehicles equipped with a LH exterior auto-dimming mirror, the LH exterior mirror glass takes longer to defrost than the RH exterior mirror glass due to differences in the mirror glass thickness.

System Diagram - Exterior, Power Fold

E342606 *.sttxt { visibility: hidden; } *.stcallout { visibility: visible; } 1 LH Exterior Mirror 2 LH Front Door Window Control Switch 3 RH Exterior Mirror 4 PDM 5 Folding Motor 6 GWM 7 BCM 8 Folding Motor 9 DDM 10 Folding Mirror Control Switch

Item	Description
1	LH Exterior Mirror
2	LH Front Door Window Control Switch
3	RH Exterior Mirror
4	PDM
5	Folding Motor
6	GWM
7	BCM
8	Folding Motor
9	DDM
10	Folding Mirror Control Switch

Network Message Chart

  Module Network Input Messages — DDM

Broadcast Message	Originating Module	Message Purpose
Ignition status	BCM	Used to determine if the ignition switch conditions have been met to fold or unfold the exterior mirrors

  Module Network Input Messages — PDM

Broadcast Message	Originating Module	Message Purpose
Passenger mirror command	DDM	Used by the PDM to control operation of the RH power folding exterior mirror.

System Operation - Exterior, Power Fold

NOTE: If the exterior mirrors are folded by pressing the exterior mirror fold switch, the automatic folding feature is disabled until the mirrors are unfolded by pressing the exterior mirror fold switch.

NOTE: If the exterior mirrors are folded and unfolded several times consecutively, the power folding feature is disabled for approximately 3-10 minutes to prevent damage to the exterior mirror folding motors.

The exterior mirrors have a power fold feature that can be activated manually or automatically. The exterior mirrors can be manually folded and unfolded by pressing the exterior mirror fold switch (integral to the LH front window control switch). When the automatic folding feature is turned on in the IPC message center, the exterior mirrors automatically fold in when the vehicle is locked, after the transmission is placed in park and the driver door is opened and closed. The mirrors automatically fold out when the vehicle is unlocked and the LH front door is opened and closed. The auto-fold feature is disabled if the mirrors are folded manually using the exterior mirror fold switch.

When the ignition is on and a mirror fold is initiated by pressing the exterior mirror fold switch, the DDM supplies voltage and ground to the LH exterior mirror folding motor and sends the passenger mirror command message to the PDM . The PDM uses this message to supply voltage and ground to the RH exterior mirror folding motor. When the exterior mirror fold switch is pressed again, the DDM reverses the polarity of the voltage supplied to the LH exterior mirror folding motor and sends the passenger mirror command message to the PDM , which reverses the polarity of the voltage supplied to the RH exterior mirror folding motor.

When the driver turns the automatic folding feature on or off in the IPC message center, the personality data message containing the selection is sent from the IPC to the DDM , with the GWM acting as a gateway. When automatic folding is turned on, the DDM monitors the ignition status and vehicle lock status messages from the BCM as well as the gear position message from the PCM . When the transmission is placed in park, ignition is turned off, LH front door is opened and closed and the vehicle is locked using the passive key or door switch, the DDM supplies voltage to the LH exterior mirror folding motor and sends the passenger mirror command message to the PDM , which supplies voltage to the RH exterior mirror folding motor. The exterior mirrors remain folded until the vehicle is unlocked and the LH front door is opened and closed. After the door is closed, the DDM reverses the polarity of the voltage supplied to the LH exterior mirror folding motor and sends the passenger mirror command message to the PDM , which reverses the polarity of the voltage supplied to the RH exterior mirror folding motor.

System Operation - Exterior Auto-Dimming

When bright light is detected from behind the vehicle during nighttime conditions, the interior auto-dimming mirror supplies voltage and ground to electronically darken the LH exterior mirror glass.

To provide increased visibility when backing up, the LH exterior mirror glass automatically returns to a high reflectance mode whenever the vehicle in REVERSE, regardless of exterior lighting conditions.

System Operation- Interior Manual-Dimming

On vehicles equipped with interior manual dimming, the manual interior rear view mirror can be adjusted from a day position to a night position to reduce unwanted glare caused by headlamps from behind the vehicle. Adjusting the interior mirror is accomplished by using the day/night tab, located on the bottom of the interior mirror. Pulling the tab rearward, towards the driver, adjusts the mirror to the night position. Pushing the tab forward, away from the driver, adjusts the mirror to the day position.

System Operation- Interior Auto-Dimming

The interior auto-dimming mirror uses 2 integral photoelectric sensors to detect exterior lighting conditions. When the forward facing sensor detects daytime conditions, the rearward facing sensor is inactive and the mirror glass stays in a high reflectance mode. When the forward facing sensor detects nighttime conditions, the rearward facing sensor is active. When bright lights (glare) are detected by the rearward facing sensor, the mirror glass is electronically darkened. To provide increased visibility when backing up, the interior rear view mirror automatically returns to a high reflectance mode any time reverse gear is selected, regardless of exterior lighting conditions.

Component Description

Exterior Mirror Control Switch

The exterior mirror control switch is a momentary contact switch that is integral to the LH front door window control switch, which is connected to the DDM through a LIN circuit. The LED on each exterior mirror selection button illuminates to indicate which exterior mirror is selected for adjustment.

Exterior Mirror Fold Switch

The exterior power folding mirror control switch is integral to the LH front window control switch, which is connected to the DDM through a LIN circuit.

Exterior Mirror

Each exterior mirror has 2 bi-directional motors that are used to control the position of the exterior mirror glass. The potentiometers used to monitor the mirror glass position are integral to the motors.

The heated exterior mirrors use heating elements that are integral to the exterior mirror glass.

Each exterior mirror has an integral, bi-directional folding motor that is used to fold and unfold the exterior mirror.

The exterior mirrors use a jumper harness between the vehicle wiring harness and the exterior mirror motors and the heated mirror glass. The exterior mirror jumper harness is integral to the exterior mirror. Before replacing an exterior mirror or motor, inspect the jumper harness for opens, shorted circuits or damaged and pushed-out pins. If a concern with the exterior mirror jumper harness exists, attempt to repair the jumper harness.

The exterior mirrors may include turn signal indicators. For additional information on the mirror-mounted turn signal indicators,
Refer to: Exterior Lighting (417-01 Exterior Lighting, Description and Operation).

The exterior mirrors may include logo lamps. For additional information on the mirror-mounted logo lamps,
Refer to: Interior Lighting - System Operation and Component Description (417-02 Interior Lighting, Description and Operation).

The exterior mirrors may include parking lamps. For additional information on the mirror-mounted parking lamps,
Refer to: Exterior Lighting (417-01 Exterior Lighting, Description and Operation).

The exterior mirrors may include BLIS ® Light Emitting Diodes (LEDs). For additional information on the mirror-mounted BLIS ®,
Refer to: Interior Camera System - System Operation and Component Description (419-04B Interior Camera System, Description and Operation).

The exterior mirrors may include side cameras. For additional information on the mirror-mounted side cameras,
Refer to: Parking Aid - System Operation and Component Description (413-13A Parking Aid, Description and Operation).

DDM

The DDM monitors the exterior mirror control switch and exterior mirror fold switch through a LIN circuit. The DDM is responsible for supplying voltage and ground to the LH exterior mirror motors, LH exterior mirror motor potentiometers, LH exterior mirror glass heating element and LH exterior mirror folding motor.

The DDM sends RH exterior mirror movement and fold requests to the PDM through the MS-CAN .

Passenger Door Module (PDM)

The PDM is responsible for supplying voltage and ground to the RH exterior mirror motors, RH exterior mirror motor potentiometers, RH exterior mirror glass heating element and RH exterior mirror folding motor.

Interior Rear View Mirror - Manual-Dimming

On vehicles equipped with interior manual dimming, the manual dimming interior rear view mirror has a lever at the back of the mirror that must be pulled forward or pushed rearward by the driver to activate the manual dimming function. Manual dimming is completely controlled by the driver.

Interior Rear View Mirror - Auto-Dimming

The auto-dimming rear view mirror has 2 photoelectric sensors, one on the front of the mirror (facing the windshield) and one on the rear of the mirror (at the top of the mirror glass). Based on inputs from these sensors, the automatic dimming feature adjusts the reflectance level of the interior rear view mirror glass to eliminate unwanted glare. The reflectance level of the mirror glass is variable and depends on the amount of rear glare in relation to ambient light conditions in front of the interior mirror.