Ford Escape: Parking Aid - Vehicles With: 180 Degree Camera/360 Degree Camera/Parking Aid Camera / Description and Operation - Parking Aid - System Operation and Component Description

System Operation

Rear Only Parking Aid Camera

System Diagram

Network Message Chart

  BCM Network Input Messages

  ABS Module Network Input Messages

  APIM Network Input Messages

Audio System Image Display

NOTE: The liftgate must be fully closed for correct operation of the rear parking aid camera system.

The rear parking aid camera image is displayed by the audio system display when reverse is selected. To determine the transmission gear position and enable the camera display, the PCM sends the gear position message to the GWM on the HS-CAN1 . The GWM then sends the message to the APIM via the HS-CAN3 .

The camera is on any time it receives voltage (when the ignition is on), but a video signal is only generated under certain conditions. When reverse is selected, the camera continuously generates a video signal. When any gear except reverse is selected, the camera turns the video signal off when the vehicle speed reaches 16 km/h (10 mph), and turns the video signal on when vehicle speed falls below 8 km/h (5 mph). If the camera is not configured properly, some features may be inoperative. The camera sends the video signal on shielded twisted pair to the APIM , which displays the image on the audio system display.

The following parking aid camera system features are driver selectable:

• Visual park aid alert — allows the driver to see the object causing the parking aid system to sound.
• Manual zoom — allows the driver to manually zoom the image.
• Video delay — allows the driver to see the image behind the vehicle after the vehicle is shifted out of reverse into any gear other than park.

The following camera system features are not driver selectable:

• 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.

The audio system display settings menu is used to turn the visual park aid alert and video delay on and off. The visual park aid alert and video delay features are generated within the APIM .

To turn the manual zoom feature on and off, the driver uses an on-screen button located on the audio system display while in reverse. The driver generated commands originate at the audio system display, which is hardwired to the APIM . The APIM sends the driver generated commands over the HS-CAN3 to the GWM . The GWM then sends the commands to the BCM on the HS-CAN1 . The BCM sends the zoom command to the rear parking aid camera via the LIN circuit. The zoom is generated by the rear parking aid camera.

The fixed and active guidelines are generated by the rear parking aid camera and are not selectable by the driver.

LIN Communication

The BCM and the rear parking aid camera communicate via a LIN circuit which is a dedicated single wire communication network. The BCM is the master module on the LIN , and it sets and stores Diagnostic Trouble Codes (DTCs) for the rear parking aid camera and the communication network.

The messages sent from the BCM to the camera are:

• Camera configuration data
• Display manual zoom request
• Guideline on/off request
• Luggage compartment lid ajar status
• Steering angle
• Standby enable/disable request

The messages sent from the camera to the BCM are:

• Camera status
• Display zoom status
• Camera part number data
• Guideline status

Visual Park Aid Alert

NOTE: The on-screen alert transitions may not match changes in the audible parking aid alert tone frequency.

The visual park aid alert feature displays a visual highlight in the zone where an object has been detected by the rear parking aid system. This feature utilizes the parking aid sensor data from the PAM to generate the visual highlights on the video image. When reverse is selected and an object is detected by a rear parking aid sensor, the parking aid sensor data message from the PAM is used by the APIM to generate the alert.

If the visual park aid alert feature is enabled, the feature is still operational even if the rear parking aid system has been disabled by the driver.

Fixed Guidelines

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

The rear parking aid 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 identify different zones between the rear of the vehicle and objects. The rear parking aid camera generates the fixed guidelines over the video image.

The guidelines are not shown when reverse is not selected (video delay active).

Fixed guidelines are not shown when the liftgate is open.

Active Guidelines

NOTE: If the battery has been disconnected or discharged, or a module is disconnected or replaced, the active guidelines may be inoperative until the vehicle is driven on a flat and smooth road at 32 km/h (20 mph) or more, with hands placed loosely on the steering wheel and minimal steering correction for approximately 30 seconds.

The active guidelines feature displays dynamic guidelines that correspond to the projected path of vehicle travel, based on the current steering angle. Several modules are involved in generating the steering angle data used to support the active guidelines. The PSCM monitors the steering angle sensor and sends the steering wheel angle sensor data to the ABS module via the HS-CAN2 . The ABS module uses this message from the PSCM to generate the steering angle message that is sent to the GWM on the HS-CAN2 . The GWM then sends the message to the BCM via the HS-CAN1 . The BCM sends the steering angle data to the rear parking aid camera via the LIN circuit. The rear parking aid camera uses this data to generate the active guidelines over the video image.

If the steering wheel is in the straight-ahead position or if the liftgate is open, the active guidelines are not shown.

The guidelines are not shown when reverse is not selected (video delay active).

Manual Zoom

The manual zoom feature is generated by the rear parking aid camera and has one level of zoom. If the manual zoom feature is on and the vehicle is shifted out of reverse, the manual zoom feature is disabled and must be re-enabled the next time reverse is selected. When the driver turns the zoom on or off at the audio system display, the zoom command is sent through HS-CAN3 to the GWM then over HS-CAN1 to the BCM . The BCM then sends the manual zoom request message to the rear parking aid camera via the LIN circuit and the camera turns the zoom on or off.

Video Delay

When the video delay is turned on the the APIM keeps the rear video display enabled 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

Rear Parking Aid Camera

The rear parking aid camera is located on the liftgate. The rear only parking aid camera system, the rear camera communicates with the BCM through a LIN circuit. The rear camera, on the rear only parking aid camera system, must be configured using a diagnostic scan tool after replacement in order for all features to operate properly.

Audio System Display

The rear only parking aid camera system images are displayed on the audio system display.

For additional information on the audio system display,
Refer to: Information and Entertainment System (415-00 Information and Entertainment System - General Information - Parking Aid Camera) .

BCM

The BCM serves as a gateway between the rear parking aid camera and other modules on the HS-CAN1 . It communicates with the rear parking aid camera via the LIN and stores Diagnostic Trouble Codes (DTCs) for the camera and the LIN in the event of a concern.

The BCM requires PMI when replaced.
Refer to: Module Configuration - System Operation and Component Description (418-01 Module Configuration, Description and Operation).