Parking Aid - System Operation and Component Description

System Operation

System Diagram

Network Message Chart

  BCM Network Input Messages

  APIM Network Input Messages

Image Display

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

The video camera image is displayed by the FDIM when the transmission is placed in reverse. The video camera signal is sent from the video camera on shielded twisted pair wires to the APIM , which displays the image on the FDIM . On vehicles equipped with an automatic transmission, the APIM determines the gear selector position using the transmission gear lever position message from the TCM . On vehicles equipped with a manual transmission, the BCM receives a 12 volt signal from the reverse switch and sends the transmission in reverse message to the APIM .

The camera generates a video signal any time it receives voltage, regardless of the current configuration. If the video camera is not configured properly, some features may be inoperative. The camera is supplied voltage when the ignition is on.

LIN Communication

The LIN is a dedicated single wire communication network between the video camera and the BCM . The modules use broadcast serial communication over the LIN , with the BCM sending a message, and the video camera either replying to or simply receiving certain messages. The BCM is the master module on the LIN , and it sets and stores Diagnostic Trouble Codes (DTCs) for the video camera and the communication network.

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

• camera configuration data
• enable/disable visual park aid alert
• enable/disable fixed guidelines
• enable/disable active guidelines (if equipped)
• zoom request
• parking aid audible warning status
• parking aid sensor distance to object data
• reverse gear selected
• decklid/tailgate status
• current steering angle

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

• camera status
• visual park aid alert status
• fixed guideline status
• active guideline status (if equipped)
• zoom status
• camera part number data

Video Camera Features

NOTE: If the video camera is not configured, the video camera features will be inoperative.

All of the video camera features are enabled and disabled within the FDIM menu screen. The video camera system has 5 available features:

• Fixed guidelines — assists the driver with aligning the vehicle with an object.
• Active guidelines (if equipped)— projects 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 is not displayed if the vehicle is shifted into PARK.

For each one of these system features except the video camera delay feature, the driver generated camera commands are sent from the FDIM to the APIM . The APIM sends the rear view camera setting request message to the BCM through the CAN . The BCM then sends the commands to the video camera through the LIN circuit. The video camera delay feature is controlled entirely within the APIM .

The video camera outputs the video signal to the APIM which in turn displays the video on the FDIM .

Visual Park Aid Alert

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

On vehicles equipped with an audible rear parking aid system, the visual park aid alert feature utilizes the rear parking aid sensor data to visually highlight the video camera image where an object has been detected. When the transmission selector is in REVERSE and an object is detected in the path of the parking aid sensor, parking aid range to object data is sent from the BCM to the rear video camera to generate the visual alert.

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.

The visual park aid alert feature is generated by the video camera based on the parking aid sensor messages received from the BCM .

Fixed Guidelines

NOTE: The color-coded lines cannot indicate accurate or consistent distances between objects located behind 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.

If the rear video image is manually zoomed by the driver, only the dashed center line is displayed on the image. The guidelines are not displayed if the rear liftgate or decklid is not fully closed.

The fixed guidelines are generated by the video camera and the last known on/off setting for the guidelines is stored by the camera.

Active Guidelines (if equipped)

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. The lines display the vehicle's expected path of travel based on steering angle input. Active guidelines are not shown when the steering wheel is straight.

Manual Zoom

When the driver manually zooms the rear video camera image, the zoom request is sent from the APIM to the IPC via the Infotainment Controller Area Network (I-CAN), then the IPC sends the message to the BCM via the MS-CAN . When the BCM receives the zoom request from the APIM , the BCM sends the request to the rear video camera through the LIN circuit. The video camera then zooms the image in or out.

The manual zoom feature is disabled when the vehicle is shifted out of REVERSE. 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 until the vehicle reaches 10 km/h (6 mph). With the video delay off, the image displays until the transmission is shifted out of REVERSE. The video delay feature is controlled by the APIM .

Component Description

Video Camera

The rear video camera is installed on the tailgate or decklid, above the license plate. The video camera provides a video signal any time it receives voltage and ground, regardless of configuration.

The rear video camera is configured by the BCM every time the key is turned on.

Video Display

The video camera image is displayed on the FDIM by the APIM . When the transmission is placed in reverse, the camera image may still be displayed on the FDIM if rear video camera system Diagnostic Trouble Codes (DTCs) are stored in the BCM . For more information about the APIM or the FDIM ,
Refer to: Information and Entertainment System - System Operation and Component Description (415-00C Information and Entertainment System - General Information - Vehicles With: AM/FM/CD/SYNC/Touchscreen Display, Description and Operation).

BCM

The BCM controls the rear video camera via the LIN . Diagnostic Trouble Codes (DTCs) for the camera and the LIN are stored in the BCM . For more information about the BCM ,
Refer to: Module Controlled Functions - System Operation and Component Description (419-10 Multifunction Electronic Modules, Description and Operation).

NOTE: The BCM has no influence over the video signal from the camera. The camera provides a video signal any time it receives voltage and ground.

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