The object alarm system monitors the distance and how close a vehicle is to an object when moving forward or backing up in a parking maneuver. The object alarm system will notify the driver of any objects of interest when backing up or moving forward at speeds less than 8 km/h (5 mph). The distance between a vehicle and an object of interest is monitored by the 4 ultrasonic sensors located in the rear or front bumpers of the vehicle (if equipped). The object alarm sensors receive the echo signal reflected off an object of interest while the vehicle is backing up or moving forward at speeds less than 8 km/h (5 mph). The object alarm system uses visual displays and audible warnings from the radio speakers to warn the driver of an object of interest within the defined field of view. The visual display comprises of two amber and one red indicators and these indicators illuminate based on the vehicle distance to the object of interest. When the ignition is ON, the object detection system performs a bulb check on the front display. When the ignition is ON and the vehicle is placed in reverse, the object detection system performs a bulb check on the rear display.

The front (if equipped) and rear object alarm systems are equipped with 4 ultrasonic sensors located on the rear or front bumpers of the vehicle. These sensors are used to monitor how close the vehicle is to an object. The object alarm sensors receive the echo signals reflected off an object of interest while the vehicle is backing up or moving forward at speeds less than 8 km/h (5 mph). The object alarm sensor is a three wire sensor comprising of the supply voltage circuit, signal circuit and the low reference circuit. Power is provided to the object alarm sensor via the supply voltage circuit from the object alarm module. The object alarm module also provides ground to the object alarm sensor via the object alarm sensor low reference circuit. The typical object alarm sensor signal voltage when the system is active is between 7.2 V - 9.2 V.

The information center telltale assembly visual display comprises of two amber and one red indicator(s). These indicators illuminate based on the vehicle distance to the object of interest. When the ignition is ON, the object detection system performs a bulb check on the front display. When the ignition is ON and the vehicle is placed in reverse, the object detection system performs a bulb check on the rear display. When a malfunction exists in the object alarm system, the object alarm module illuminates the information center red indicator continuously. The object alarm module provides power to the rear information center telltale assembly. Power is provided to the front information center telltale assembly from the BCM dimming supply voltage circuit. The object alarm module controls the information center indicators by providing ground via the indicator control circuit when active.

When the ignition is ON, the object detection system performs a bulb check. During the bulb check, the information center telltale assembly display located in the top of the IPC will illuminate all 3 indicators for approximately 2 seconds to indicate that the system is working. The information center telltale assembly display alerts the driver on how close an object is to the front bumper. The object detection system performs a bulb check of the information center telltale assembly display and operates when the following conditions are present:

When the ignition is ON and the vehicle is placed into reverse, the object detection system performs a bulb check. During the bulb check, the 3 indicators on the rear information center telltale assembly display will illuminate for approximately 2 seconds to indicate that the system is working. The object detection system performs a bulb check and operates when the following conditions are present:

The object detection system senses how close the vehicle is to an object. The distance is determined by the 4 ultrasonic sensors located on the front (if equipped) and rear bumper. When the system detects an object in drive, one of the following will occur:

When The system detects an object in reverse, one of the following will occur:

The object detection system can detect objects 7.6 cm (3 in) wide and at least 25.4 cm (10 inches) tall. It cannot detect objects above the level of the roof of the vehicle.

If the object detection system detects a malfunction, the object detection system will send a serial data communication message to the instrument panel cluster (IPC) to display SERVICE PARK ASSIST on the driver information center (DIC). When SERVICE PARK ASSIST is displayed in the DIC, the chime will sound and the red indicator on both information telltale centers will illuminate continuously, notifying the driver that a malfunction exist.

SERVICE PARK ASSIST

The driver information center (DIC) displays SERVICE PARK ASSIST when the object alarm module detects that a malfunction exists in the object alarm system and sends a request to the DIC to display the SERVICE PARK ASSIST message. The DIC also displays SERVICE PARK ASSIST when there is a loss of communication with the object alarm module.

PARK ASSIST DISABLED

The PARK ASSIST DISABLED message is displayed in the DIC when the object alarm system is disabled due to conditions that disable or inhibit the system. The object alarm module requests the DIC via GMLAN to display PARK ASSIST DISABLED when it detects that one of the following conditions is true:

PARKING ASSIST OFF

Vehicles equipped with the front and rear parking assist system displays PARKING ASSIST OFF in the DIC to remind the driver that the parking assist system is turned off after the vehicle is shifted out of PARK (P). Pressing the DIC set/reset button acknowledges the message and clears it from the DIC display.