Park Assist System
The park assist system for this vehicle is enabled from the factory, but is active only when the status of the ignition switch is On or Start, the parking brake is released and the transmission gear selector lever is in the Reverse (R ) position. Vehicle speed while the system is active must be less than 16 kilometers-per-hour (10 miles-per-hour) in Reverse or, less than 14 kilometers-per-hour (8 miles-per-hour) on deceleration. The system will emit a series of short, intermittent, audible beeps and, if the audio system is turned On, will automatically mute the audio system while the park assist audible warning is being generated. The audible warning changes from intermittent beeps to a continuous tone as the vehicle comes to within 30 centimeters (11.8 inches) of a detected object.
The microcontroller-based Park Assist Module (PAM) (also known as the ParkTronic System/PTS module) is the central component of the park assist system. It supplies voltage to the park assist sensors, receives and analyzes data from the sensors, calculates and communicates the proper information to the Instrument Cluster (IC) (also known as the Instrument Panel Cluster/IPC), performs system diagnostics and communicates with other electronic modules in the vehicle or with a diagnostic scan tool over the Controller Area Network (CAN) data bus. The PAM operates on battery voltage received through a fuse in the Power Distribution Center (PDC), and is grounded through a take out of the body wire harness secured to the body sheet metal.
Four ultrasonic park assist sensors in the rear bumper fascia allow the park assist system to locate and identify the proximity of nearby obstacles. These sensors each generate ultrasonic sound pulses when triggered by the PAM, then signal the PAM when an echo of the reflected sound pulses is received. The detection distance range from the rear of the vehicle is about 0.3 meters (11.8 inches) to about 2.0 meters (80 inches), and the detection height range from the ground is about 0.2 meters (7.8 inches) to about 0.8 meters (31 inches). The detection area extends somewhat around both rear sides (corners) of the vehicle.
The hard wired circuits between components related to the park assist system may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector pin out information and location views for the various wire harness connectors, splices and grounds.
However, conventional diagnostic methods will not prove conclusive in the diagnosis of the park assist system or the electronic controls and communication between modules and other devices that provide some features of the park assist system. The most reliable, efficient and accurate means to diagnose the park assist system or the electronic controls and communication related to park assist system operation requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.