Parking Aid - Video
Parking Aid - Video
Principles of Operation
NOTE: Close the liftgate for correct operation of the video camera system.
The rear video camera system is active with the ignition in run and the transaxle selector in the REVERSE (R) position. The video camera receives commands and sends status over a dedicated Local Interconnect Network (LIN) to the Body Control Module (BCM). The video camera sends a video signal to the Accessory Protocol Interface Module (APIM) on a pair of shielded video circuits. The APIM (Accessory Protocol Interface Module) sends the video signal to the Front Display Interface Module (FDIM) (mounted to the APIM (Accessory Protocol Interface Module)) which displays the video image of the area behind the vehicle.
The video camera system has 4 video features that are controlled in the FDIM (Front Display Interface Module). The features are:
- Fixed guidelines
- Visual park aid alert
- Manual zoom
- Video camera delay
For each one of these system features except the camera delay feature, the APIM (Accessory Protocol Interface Module) sends a network message requesting the system feature to the Instrument Panel Cluster (IPC) via the High Speed Controller Area Network (HS-CAN). The IPC (Instrument Panel Cluster) sends the message to the BCM (Body Control Module) over the HS-CAN (High Speed Controller Area Network). The BCM (Body Control Module) sends the message to the video camera over the LIN (Local Interconnect Network). The LIN (Local Interconnect Network) is a dedicated single wire communication line that sends and receives network messages from the BCM (Body Control Module) to the video camera. The video camera delay feature is controlled with in the APIM (Accessory Protocol Interface Module).
The messages sent from the BCM (Body Control Module) to the video camera are:
- transmission selector (PRNDL) status
- liftgate 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 (Body Control Module) are:
- camera status
- display zoom status
- camera part number data
- visual park aid alert status
- fixed guideline status
All of the video camera features are enabled and disabled within the FDIM (Front Display Interface Module) menu screen.
The video camera delay feature keeps the image displayed on the FDIM (Front Display Interface Module) until the vehicle reaches 8 km/h (5 mph) when the vehicle is shifted out of reverse or if any button on the FDIM (Front Display Interface Module) is pressed.
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.
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 visual park aid alert feature utilizes the 4 parking aid sensor inputs from the Parking Aid Module (PAM) and the video camera image. When the transaxle selector is in the reverse position and an object is detected in the path of the parking aid sensor, a network message of the distance from the parking aid sensor to the object is sent from the PAM (Parking Aid Module) to the BCM (Body Control Module) over the HS-CAN (High Speed Controller Area Network). The BCM (Body Control Module) networks the parking aid sensor message to the video camera over the LIN (Local Interconnect Network). 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 highlighted visual alerts are still operational if the parking aid system is disabled within the IPC (Instrument Panel Cluster) and the visual alert feature is enabled.
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. When the FDIM (Front Display Interface Module) requests the video image to be zoomed in or out, the APIM (Accessory Protocol Interface Module) sends a zoom request network message to the IPC (Instrument Panel Cluster). The IPC (Instrument Panel Cluster) sends the message to the BCM (Body Control Module), which sends the zoom request message to the video camera over the LIN (Local Interconnect Network). The video image sent by the video camera is then digitally zoomed in or out.