Principles Of Operation

Parking Aid

Principles of Operation

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

Parking Aid System - Rear

The parking aid sensors detect objects approximately 2 m (6 ft) from the rear of the vehicle, 50 cm (1.6 ft) 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 which is attached to the PAM. 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 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 is disabled if a fault is detected in 1 of the 4 sensors, the parking aid speaker or the PAM. This condition is indicated by the parking aid disabled warning in the message center. The PAM is on the MS-CAN and can be diagnosed with a scan tool.

The PAM communicates with the scan tool, the SJB, the Audio Control Module (ACM) and the Instrument Cluster (IC) on the MS-CAN. For network messages used by the PAM, refer to the Parking Aid Module (PAM) network communication messages.

Parking Aid System - 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 (1.6 ft) from the front side of the vehicle, and 16 cm (6 in) above the ground. The PAM 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 (1.6 ft) from the rear side of the vehicle, and 16 cm (6 in) above the ground. The PAM 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 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 parking aid system-front or rear can independently be disabled through a control in the message center. The parking aid system is disabled if a fault is detected in 1 of the 8 sensors , the parking aid speaker or the PAM. This condition is indicated by the parking aid disabled warning in the message center. The PAM is on the MS-CAN and can be diagnosed with a scan tool.

The PAM communicates with the scan tool, the SJB, the ACM and the IC on the MS-CAN. For network messages used by the PAM, refer to the PAM network communication messages.

Parking Aid Module (PAM) Network Communication Messages: