413-13B Parking Aid	2013 - 2014 MKZ
Description and Operation	Procedure revision date: 11/20/2012

Parking Aid - System Operation and Component Description

System Operation

Parking Aid - Video

System Diagram

Network Message Chart

BCM Network Input Messages

Broadcast Message	Originating Module	Message Purpose
Camera commands	APIM	Used to command the static and active guidelines status and zoom level.
Parking aid range to object	PAM	Used to highlight the zone where an object is detected.
Gear lever position	TCM	Used to enable and disable the rear video display.
Steering angle	PSCM	Used to create the vehicle intended path on video display.
Vehicle speed	PCM	Used to turn the rear video camera delay off after the vehicle speed exceeds a preset threshold.

Accessory Protocol Interface Module (APIM) Network Input Messages

Broadcast Message	Originating Module	Message Purpose
Backup camera status	BCM	Used to display the video status for static and active guidelines and zoom level.

Image Display

The luggage compartment lid must remain closed for correct operation of the video camera system.

The video camera system has 5 user-selectable features:

Fixed guidelines — assists the driver with aligning the vehicle with an object.
Active guidelines — displays the intended path of the vehicle based upon steering wheel input.
Visual park aid alert — assists the driver to visually see the object causing the parking aid system to sound.
Manual zoom — assists the driver with connecting or towing a trailer allowing the driver to manually zoom closer to an object behind the vehicle.
Video camera delay — allows the driver to see the image behind the vehicle after the vehicle is shifted out of REVERSE. The image will not be displayed if the vehicle is shifted into PARK.

The camera commands from the driver are generated at the FDIM which is hardwired to the APIM . The commands are then sent from the APIM to the BCM . The BCM sends the command to the video camera via the LIN circuit. When the rear video camera system is active, the video camera sends the video signal to the APIM , which displays the image on the FDIM .

The BCM and the video camera communicate via a LIN circuit which is a dedicated single wire communication network.

The messages sent from the BCM to the video camera are:

Transmission in reverse
Luggage compartment lid ajar status
Camera configuration data
Display manual zoom request
Parking aid audible warning status
Parking aid sensor distance to object data

The messages sent from the video camera to the BCM are:

Camera status
Display zoom status
Camera part number data
Visual park aid alert status
Fixed guideline status

Visual Park Aid

The visual park alert feature displays guidelines on top of the video image to assist the driver with maneuvering a vehicle into a space. Active guidelines are not shown when the steering wheel is straight.

The visual park aid alert feature utilizes the rear parking aid sensor inputs from the PAM and the video camera image. When the transmission selector is in REVERSE and an object is detected by a rear parking aid sensor, parking aid range to object data is sent from the PAM through the BCM to the video camera.

The visual alerts are red, yellow or green and appear as highlights on top of the displayed image to indicate in which zone the object is detected. If the visual park aid alert feature is enabled, the highlighted visual alerts are still operational even if the parking aid system has been disabled by the driver.

Fixed Guidelines

NOTE: The color-coded lines cannot indicate accurate or consistent distances between objects located behind the vehicle and at the rear of the vehicle. This normal condition is due to variances in vehicle ride height, including, but not limited to, vehicle loading.

The video camera fixed guidelines feature displays guidelines on top of the video image to assist the driver with alignment of the vehicle. A dashed line on the displayed image represents the center of the vehicle and 3 color-coded lines (red, yellow, green) identify different zones between the rear of the vehicle and objects.

Active Guidelines

The video camera active guidelines feature displays guidelines on top of the video image to assist the driver with maneuvering a vehicle into a space. Active guidelines are not shown when the steering wheel is straight.

Manual Zoom

The manual zoom feature is controlled by the video camera. The manual zoom feature has 3 zoom levels that are only active when the vehicle is in REVERSE. If the manual zoom feature is enabled and the vehicle is shifted out of REVERSE the manual zoom feature is disabled. The manual zoom feature must be re-enabled the next time the vehicle is shifted into REVERSE.

Video Delay

When the video delay is turned on, the video image remains displayed after the transmission is shifted out of REVERSE, into any gear other than PARK, until the vehicle speed reaches 8 km/h (5 mph). With the delay off (default), the image displays until the transmission is shifted out of REVERSE.

Component Description

Video Camera

The rear video camera system is active with the ignition in RUN and the transmission selector in REVERSE. The video camera receives commands and sends status over a dedicated LIN to the BCM . After replacement, the video camera must be configured through the BCM using a diagnostic scan tool.