Parking Aid

Parking Aid

Principles of Operation

NOTE: The Smart Junction Box (SJB) is also known as the Generic Electronic Module (GEM).

Rear

The rear parking aid sensors detect objects approximately 2 m (6 ft) from the rear of the vehicle, 50 cm (20 in) from the rear side of the vehicle, and 16 cm (6 in) above the ground. The Parking Aid Module (PAM) calculates the distance to an object within the 170 degree semicircular area around the rear of the vehicle. A variable rate warning tone is generated from a parking aid speaker. The parking aid speaker increases the warning tone rate as the vehicle nears an obstacle. When an object is detected within 25 cm (10 in) of the sensors, the warning tone becomes continuous.

The rear parking aid system is enabled when the ignition switch is in the RUN position and the REVERSE (R) gear is selected. The parking aid system can be disabled with a control in the Instrument Panel Cluster (IPC) message center. The parking aid system is disabled if a fault is detected in any of the sensors, the parking aid speaker or the PAM (Parking Aid Module). This condition is indicated by the parking aid disabled warning in the message center. The PAM (Parking Aid Module) is on the High Speed Controller Area Network (HS-CAN) and can be diagnosed with a scan tool.

Front and Rear

For the rear parking aid system, the front and the rear sensors are activated at all times when REVERSE (R) is selected. For the front parking aid system, only the front sensors are activated when DRIVE (D) is selected and the vehicle speed is greater than 0 km/h (0 mph) and less than 13km/h (8 mph).

The front parking aid sensors detect objects approximately 70 cm (27.6 in) from the front of the vehicle, 50 cm (20 in) from the front side of the vehicle, and 16 cm (6 in) above the ground. The PAM (Parking Aid Module) calculates the distance to an object within the 170 degree semicircular area around the front of the vehicle. A higher pitched variable rate warning tone is generated from the front parking aid speaker. The warning tone rate of the front parking aid speaker, increases as the vehicle nears an obstacle. When an object is detected within 25 cm (10 in) of the sensors, the warning tone becomes continuous.

The rear parking aid sensors detect objects approximately 2 m (6 ft) from the rear of the vehicle, 50 cm (20 in) from the rear side of the vehicle, and 16 cm (6 in) above the ground. The PAM (Parking Aid Module) calculates the distance to an object within the 170 degree semicircular area around the rear of the vehicle. A lower pitched variable rate warning tone is generated from the rear parking aid speaker. The warning tone rate of the rear parking aid speaker, increases as the vehicle gets nears an obstacle. When an object is detected within 25 cm (10 in) of the sensors, the warning tone becomes continuous.

The front and rear parking aid system is enabled when the ignition switch is in the RUN position and the DRIVE (D) or REVERSE (R) gear is selected. The front or rear parking aid system can be independently disabled through a control in the IPC (Instrument Panel Cluster) message center. The parking aid system is disabled if a fault is detected in any of the sensors, the parking aid speaker or the PAM (Parking Aid Module). This condition is indicated by the parking aid disabled warning in the message center. The PAM (Parking Aid Module) is on the HS-CAN (High Speed Controller Area Network) and can be diagnosed with a scan tool.

Active Park Assist System

Active park assist system detects available parking space and automatically steers the vehicle in the parking space without the driver touching the steering wheel. The driver controls the accelerator, transmission selection and the vehicle brakes. The system visually and/or audibly instructs the driver throughout the procedure to safely park the vehicle. The PAM (Parking Aid Module) controls the active park assist system. The system uses 2 long range ultrasonic sensors that are hardwired to the PAM (Parking Aid Module) to detect the available parking space for the vehicle. The PAM (Parking Aid Module) uses the HS-CAN (High Speed Controller Area Network) to send and receive network messages to control the active park assist system. Refer to Active Parking Assist for active park assist information.

Network Communication

NOTE: Both the Medium Speed Controller Area Network (MS-CAN) and the HS-CAN (High Speed Controller Area Network) are used for intermodule communication. A gateway message is transferred from one network to another network through the Instrument Panel Cluster (IPC). For a complete list of Controller Area Network (CAN) multiplex messages, refer to Information Bus.

Parking Aid Module (PAM) Network Communication Messages