Land Rover Discovery: Parking Exit

1. Parking Exit Sequence

When parking exit is selected, the park assist sensors search the area for a space that is big enough to manoeuver out off.

When a space big enough has been identified, the park assist sensors inform the Parking Aid Control Module (PACM) so that the PACM control calculate the parking exit trajectory. The PACM then sends a High Speed (HS) Controller Area Network (CAN) chassis bus message via the Gateway Module (GWM) to the Instrument Cluster (IC). A message will then be displayed in the Instrument Cluster (IC) message center and a audio warning from the speakers will inform the driver of this.

The Parking Aid Control Module (PACM) will then inform the Instrument Cluster (IC) to instruct the driver to select Reverse (R) gear. Once driver has followed these instructions, information is then sent to the Transmission Control Module (TCM) and Power Steering Control Module (PSCM) and back to the Parking Aid Control Module (PACM) for perpendicular parking sequence to begin.

The driver will be then instructed to select Drive (D) gear and will continue to follow instructions that are displayed on the Instrument Cluster (IC) message center.

Once the procedure is finished, the PACM will inform the Instrument Cluster (IC) message center that parking out procedure is now complete. The driver will be informed by a message in the IC message center.

SYSTEM DIAGNOSTICS FOR PARKIN GAID AND PARK ASSIST

If the On-Board Diagnostic (OBD) system identify a fail, the following warnings will be apply:

• The Instrument Cluster (IC) displays an error message.
• The front audio system speakers will emit a 3 second continuous tone.
• A Diagnostic Trouble Code (DTC) is logged in the Parking Aid Control Module (PACM) module.

The PACM has a diagnostic connection via the HS CAN chassis bus to enable faults to be retrieved using the Land Rover approved diagnostic equipment. Additionally an OBD routine within the PACM constantly monitors the system and alerts the driver to a system fault by emitting a 3 second continuous tone through the front audio speakers when the ignition is switched on. The control switch Light Emitting Diode (LED) will also flash 6 times when reverse gear is selected or the parking aid system switch is pressed.

REAR VIEW CAMERA ( RVC ) - OPERATION

A Composite Video Baseband Signal (CVBS) connection between the camera and the Touch Screen (TS) or Audio Head Unit (AHU) (depending on vehicle specification) is used for the video image transmission.

The camera receives power at all times when the ignition is in power mode 6 or 7 from the Rear Junction Box (RJB). When reverse gear is selected, the Transmission Control Module (TCM) sends a reverse gear selected signal on the High Speed (HS) Controller Area Network (CAN) powertrain bus. This signal is then transmitted by the Gateway Module (GWM) to the rear view camera, which connects to the Medium Speed (MS) CAN comfort bus. The camera then sends a message to entertainment system requesting for the image to be displayed and the TS. The displaying of the TS is a wide-angle color image of the view from the rear of the vehicle.

When reverse gear is deselected, the camera image remains on the TS for 5 seconds after the transmission has been put into drive 'D', 'P', 'N', or 'S'.

This is to prevent the TS switching between screens if the vehicle is being maneuvered into a parking space. If the vehicle forward speed exceeds 16 km/h (10 mph) within the 5 second period, the camera image is removed from the TS.

If the TS display is switched off, the camera image will be automatically displayed when reverse gear is selected. When reverse gear is deselected and the 5 second period has expired, the TS will revert back to its switched off state

The RVC (rear view camera) provides additional information to the driver when reversing the vehicle. When reverse gear is selected the RVC automatically displays a wide-angle color image of the view from the rear of the vehicle onto the TS. Overlay graphics are displayed by a combination of signals received on the MS CAN comfort bus to the TS.

Perpendicular / Parallel parkingProximity Camera System - Operation

READ NEXT: