Lincoln Nautilus: Parking Aid - Vehicles With: Rear Parking Aid / Parking Aid - System Operation and Component Description. Description and Operation

System Operation

Parking Aid - Audible

System Diagram

*.sttxt { visibility: hidden; } *.stcallout { visibility: visible; } 1 LH Rear Outer Sensor 2 LH Front Outer Sensor 3 LH Rear Inner Sensor 4 LH Front Inner Sensor 5 RH Rear Inner Sensor 6 RH Front Inner Sensor 7 RH Rear Outer Sensor 8 RH Front Outer Sensor 9 Left Rear Side Sensor 10 Right Rear Side Sensor 11 Left Front Active Sensor 12 Right Front Active Sensor 13 Parking Aid Switch 14 PAM 15 PCM 16 BCM 17 PSCM 18 GWM 19 ABS Module 20 SCCM 21 TRM 22 APIM 23 Audio System Display 24 IPC 25 ACM 26 Speakers 27 13 or 19 speaker system 28 DSP 29 Speakers E350300

Item	Description
1	LH rear outer sensor
2	LH front outer sensor
3	LH rear inner sensor
4	LH front inner sensor
5	RH rear inner sensor
6	RH front inner sensor
7	RH rear outer sensor
8	RH front outer sensor
9	Left rear side sensor
10	Right rear side sensor
11	Left front active sensor
12	Right front active sensor
13	Parking aid switch
14	PAM
15	PCM
16	BCM
17	PSCM
18	GWM
19	ABS module
20	SCCM
21	TRM
22	APIM
23	Audio system display
24	IPC
25	ACM
26	Speakers
27	13 or 19 speaker system
28	DSP
29	Speakers

Network Message Chart

  PAM Network Input Messages

Broadcast Message	Originating Module	Message Purpose
Ambient air temperature filtered	PCM	Used to temperature compensate the parking aid sensors.
Day/night status	BCM	Light compensates the parking aid sensors.
Gear lever position	PCM	Enables or disables the front or rear parking aid depending on the gear lever position.
Front parking aid enable request	IPC	Enables or disables the front parking aid.
Ignition key type	BCM	Disables the parking aid switch when a MyKey® restricted key is in use.
Ignition status	BCM	Communicates the ignition switch state.
Outside air temperature	HVAC module	Temperature compensates the parking aid sensors.
Rear parking aid enable request	IPC	Enables or disables the rear parking aid.
Stability-traction control event in progress	ABS module	Disables the active park assist if a stability or traction control system activation occurs.
Stability-traction control indicator request	ABS module	Disables the active park assist if a stability or traction control system fault occurs.
Steering wheel angle	ABS module	Determines the current steering angle.
Trailer lamp connected	TRM	Deactivates the system if a trailer is connected.
Vehicle configuration data	BCM	Determines the vehicle configuration.
Vehicle speed	PCM	Disables the parking aid if the vehicle speed exceeds a preset threshold.
Wheel speed data	ABS module	Confirms vehicle movement and calculates distance traveled during active park assist maneuvers.
Wheel rotation data	ABS module	Confirms wheel rotation during active park assist maneuvers.
Wheel rotation direction	ABS module	Confirms wheel rotation direction during active park assist maneuvers.

  IPC Network Input Messages

Broadcast Message	Originating Module	Message Purpose
Audio chime status	ACM	Provides audio chime status feedback to the IPC .
Parking aid chime request	PAM	Commands parking aid warning tones through the IPC chime arbitrator.
Parking aid fault status	PAM	Indicates a parking aid fault.
Parking aid front status	PAM	Indicates the status of the front parking aid.
Parking aid rear status	PAM	Indicates the status of the rear parking aid.
Parking aid sensor data	PAM	Provides data on the parking aid sensors.
Parking aid text message	PAM	Provides parking aid information for the message center.

  APIM etwork Input Messages

Broadcast Message	Originating Module	Message Purpose
Parking aid chime request	PAM	Commands parking aid warning tones through the IPC chime arbitrator.
Parking aid fault status	PAM	Indicates a parking aid fault.
Parking aid front status	PAM	Indicates the status of the front parking aid.
Parking aid rear status	PAM	Indicates the status of the rear parking aid.
Parking aid sensor data	PAM	Provides data on the parking aid sensors.
Parking aid text message	PAM	Provides parking aid information for the message center.

  ACM Network Input Messages

Broadcast Message	Originating Module	Message Purpose
IPC chime request	IPC	The request to turn on the parking aid chime comes in this message.

  DSP Network Input Messages

Broadcast Message	Originating Module	Message Purpose
IPC chime request	IPC	The request to turn on the parking aid chime comes in this message.

Audible Parking Aid System Operation

The rear parking aid system calculates the distance to an object around the rear of the vehicle using 4 ultrasonic sensors. The rear parking aid sensors detect objects approximately 180 cm (70 in) from the rear of the vehicle, 50 cm (20 in) from the rear side of the vehicle, and 30 cm (12 in) above the ground. To detect objects behind the vehicle, the PAM supplies voltage and ground to the rear ultrasonic sensors while monitoring a signal return circuit from each sensor. The 4 rear sensors share common voltage and ground circuits.

The front parking aid system calculates the distance to an object around the front of the vehicle using 4 ultrasonic sensors. The front parking aid sensors detect objects approximately 70 cm (27 in) from the front of the vehicle, 50 cm (20 in) from the front side of the vehicle, 30 cm (12 in) above the ground. To detect objects in front of the vehicle, the PAM supplies voltage and ground to the front ultrasonic sensors while monitoring a signal return circuit from each sensor. The 4 front sensors share common voltage and ground circuits. Vehicles equipped with active park assist must be equipped with the front parking aid system.

Only objects that reflect a sufficient amount of sound waves are detected by the parking aid sensors. The surface properties, size and composition of an object can affect the ability of the parking aid system to detect the object.

Parking aid operation may be affected by:

• Improper sensor installation or alignment
• Dirt or ice covered sensors
• Heavy rain or snow

The parking aid system detects objects when the vehicle is in any of the following conditions:

• REVERSE (rear parking aid).
• Motion in any gear except NEUTRAL (front parking aid and side sensing system, if equipped).
• Moving toward the object.
• Stationary and the object is moving toward the vehicle.
• The vehicle and object are both moving toward one another.

The following may trigger false detections when driving at slow/creeping speeds (could be decelerating or accelerating) less than 12 km/h (8 mph), but not at a stop:

• Near another vehicle equipped with parking aid sensors. The other vehicle could be several meters away (it does not have to be within the detection zone of the host vehicle).
• Near a semi truck or school bus with air brakes (while the bus/truck is applying their brake).
• Near another signal with the same frequency.

NOTE: There is no false detection when the vehicle is at a standstill. Even if the sensors are detecting something, the system does not sound a warning when the vehicle is not moving.

As the distance to the obstacle decreases, the indicator blocks illuminate and move toward the vehicle icon as displayed on the audio system display. If there is no obstacle detected, the distance indicator blocks are greyed out.

Side Sensing (If Equipped with Active Park Assist)

The side sensing system calculates the distance to an object around the sides of the vehicle using the four active parking aid sensors used for the active park assist. The side sensors detect objects approximately 60 cm (24 in) from the side of the vehicle. A chime sounds when an object is approximately 30 cm (12 in) from the side of the vehicle. To detect objects on the sides of the vehicle, the PAM supplies voltage and ground to the front ultrasonic sensors while monitoring a signal return circuit from each sensor. The 2 front side sensors share common voltage and ground circuits with the front parking aid sensors. The 2 rear side sensors share common voltage and ground circuits with the rear parking aid sensors.

Parking Aid Audible Alert

Audio system volume is automatically reduced when a parking aid alert tone is sounded. The alert tone frequency increases as the vehicle gets closer to an obstacle. When an object is detected within 30 cm (12 in) of the sensors, the warning tone becomes continuous. When the vehicle stops moving the continuous tone stops after 3 seconds until the vehicle moves again. Objects detected outside the continuous tone area to the side of the vehicle generate a warning tone for 3 seconds. The warning tones are prioritized to the closest object. If the front and rear objects are located the same distance from the vehicle, the rear object is prioritized.

Component Description

Parking Aid Sensors

NOTE: The operating temperature range for the parking aid sensors is -40°C (-40°F) to 85°C (176°F).

The parking aid sensors are wide beam ultrasonic sensors. The sensors continuously send out ultrasonic signals to detect objects and communicate the information back to the PAM .

Only objects which reflect enough sound waves are detected by the sensors. This varies due to the shape, surface properties and size of objects being detected. Incorrect sensor alignment, dirt covered sensors, heavy rain or snow can cause objects not to be recognized.

PAM

The PAM calculates and reports (via audio system tones) the distance between the front or rear bumper of the vehicle and an object. The PAM requires PMI when replaced.

Parking Aid Switch

The parking aid system is enabled or disabled using the parking aid switch. The parking aid system is only disabled for one key cycle. The parking aid system is enabled by default and cannot be disabled when a MyKey® restricted key is in use.