| 413-13A Parking Aid | 2013 - 2014 MKZ |
| Description and Operation | Procedure revision date: 11/20/2012 |
System Operation
Parking Aid - Audible
System Diagram
Network Message Chart
PAM Network Input Messages
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| Ignition key type | BCM | Used to disable the parking aid menus if a MyKey® is in use. |
| Outside air temperature | FCIM | Used to temperature compensate the parking aid sensors. |
| Power mode | BCM | Used to communicate the ignition switch state. |
| Parking aid enable status | IPC | Used to enable or disable the front or rear parking aid. |
| Gear lever position | TCM | Used to enable or disable the front or rear parking aid depending on the gear lever position. |
| Vehicle speed | PCM | Used to disable the parking aid if the vehicle speed exceeds a preset threshold. |
IPC Network Input Messages
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| Parking aid chime request | PAM | Used to command parking aid warning tones through the audio system speakers. |
Audible Parking Aid System Operation
The PAM calculates the distance to an object within a 170 degree semicircular area (azimuth) around the front and/or rear of the vehicle. When an object is detected by the front or rear parking aid system, a variable rate warning tone is sounded through the corresponding audio system speakers (front or rear door speakers).
The front and rear parking aid system is active until the vehicle speed reaches 12 km/h (7.46 mph). Once the vehicle speed reaches 12 km/h (7.5 mph), the front and rear parking aid system is disabled until the vehicle speed falls below 8 km/h (5 mph).
The rear parking aid system calculates the distance to an object around the rear of the vehicle using 4 ultrasonic sensors. The rear outer parking aid sensors can detect objects approximately 60 cm (24 in) from the rear of the vehicle. The rear inner parking aid sensors can detect objects approximately 180 cm (71 in) from the rear of the vehicle. Objects can also be detected by these sensors that are approximately 35 cm (14 in) to the side of the rear bumper. Objects must be 30 cm (12 in) above the ground to be detected by the rear parking aid system. To detect objects behind the vehicle, the PAM supplies voltage and ground to the rear ultrasonic sensors while monitoring a signal return circuit from each sensor. The 4 rear sensors share common voltage and ground circuits.
This vehicle may also be equipped with a front parking aid system. The front parking aid system calculates the distance to an object around the front of the vehicle using 4 ultrasonic sensors. The front outer parking aid sensors can detect objects approximately 60 cm (24 in) from the front of the vehicle. The front inner parking aid sensors can detect objects approximately 180 cm (71 in) from the front of the vehicle. If the vehicle is equipped with Active Park Assist, the 2 front side sensors detect objects approximately 35 cm (14 in) to the side of the front bumper. Objects must be 30 cm (12 in) above the ground to be detected by the front parking aid system. To detect objects in front of the vehicle, the PAM supplies voltage and ground to the front ultrasonic sensors while monitoring a signal return circuit from each sensor. The 4 front sensors share common voltage and ground circuits.
Only objects that reflect a sufficient amount of sound waves are detected by the front or rear parking aid sensors. The surface properties, size and composition an object can affect the ability of the parking aid system to detect the object. Incorrect sensor alignment or installation, dirt or ice covered sensors, heavy rain and snow can also cause objects not to be detected.
Parking Aid Audible Alert
Audio system volume is automatically reduced when a parking aid alert tone is sounded. The alert tone frequency increases as the vehicle gets closer to an obstacle. When an object is detected within 300 mm (11.81 in) of the sensors, the warning tone becomes continuous. Objects detected outside the continuous tone area to the side of the vehicle generate a warning tone for 3 seconds. The warning tones are prioritized to the closest object. If the front and rear objects are located the same distance from the vehicle, the rear object is prioritized.
Component Description
Parking Aid Sensors
The parking aid sensors are wide beam ultrasonic sensors. The sensors continuously send out ultrasonic signals to detect objects and communicate the information back to the Parking Aid Module (PAM).
Only objects which reflect enough sound waves are detected by the sensors. This varies due to the shape, surface properties and size of objects being detected. Incorrect sensor alignment, dirt covered sensors, heavy rain and snow can cause objects not to be recognized.
PAM
The PAM calculates and reports (via audio system tones) the distance between the front or rear bumper of the vehicle and an object. The PAM is integral to the BCM and requires Programmable Module Installation (PMI) when replaced.
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