Hyundai Elantra CN7: Parking Distance Warning (PDW)
Description and operation
| Description |
| • | PDW consists of 8 sensors (front : 4 units, rear : 4 units) that are used to detect obstacles and transmit the result in three separate warning levels, the first, second and third to IBU via LIN communication. |
| • | IBU decides the alarm level by the transmitted communication message from the slave sensors, then operates the buzzer or transmits the data for display. |
Block Diagram
System Operation Specification
| Initial mode |
| 1. | System initializing time
|
| 2. | PDW recognizes LID and sets the sensor ID up during initialization. |
| 3. | PDW activates each sensor and then executes the diagnosis after finishing initialization of IPM(IBU). |
| 4. | PDW starting buzzer is normally worked, when sensor does not send an error message and after finishing error diagnosis. |
| 5. | If any failure is received from the any sensors, PDW starting buzzer does not work but the failure alarm is operated for a moment. If you have display option, warning sign is also shown on it.
|
| 6. | IBU memorizes the completed initializing status of sensor. |
| Normal mode |
| 1. | PDW-F : Lin communication starts and keeps the routine after IGN1 ON+D gear + below 10 km/h. PDW-R : Lin communication starts and keeps the routine after IGN1 ON+R gear |
| 2. | After initializing, the routine starts at once without PDW starting warning sound. |
| 3. | Alarms of obstacle consists of 3 level 1,2,3 step and 1,2 alarm sounds intermittently and 3 alarm sounds continuously. 1 level alarm doesn't exist in the front ultrasonic sensor. |
| 4. | In display, the data of each sensor is sent from IBU to display, for example cluster. CAN communication is used for transmission and maximum gateway time is 50ms. |
| 5. | The efficient vehicle speed of PDW operation is under 10Km/h. |
| 6. | Operation doesn't start or stops at gear N, P. |
Sensing Area
| Level | Distance range | Allowed range |
| 1 | Front : 61 - 100 cm (24.02 - 39.37 in.) / Rear : 61 - 120 cm (24.02 - 47.2 in.) | ± 15 cm (5.90 in.) |
| 2 | 31 - 60 cm (12.20 - 23.62 in.) | ± 15 cm (5.90 in.) |
| 3 | 0 - 30 cm (0 - 11.81 in) | ± 10 cm (3.94 in.) |
*Measurement condition : PVC pipe - Diameter 75 mm (0.0394 in.), length 1 m (39.37 in.), at normal temperature
Display Alarm Indicator Specification
Components and components location
| Component Location |
| 1. Integrated body control unit (IBU) | 2. Ultrasonic sensor |
Specifications
| Specifications |
|
Item
|
Specification
| |
| Ultrasonic sensor | Voltage rating | DC 12 V |
| Detecting range | 11.8 - 47.2 in. (30 - 120 cm) | |
| Operation voltage | DC 9 - 16 V | |
| Operation current | MAX 350 mA | |
| Operation temperature | -22 - 176°F (-30 - 80°C) | |
| Operation frequency | 48 ± 5 KHz | |
| Number of sensors | 8 units | |
Parking Distance Warning (PDW) Sensor
Schematic diagrams
| Circuit Diagram |
Repair procedures
| Removal |
| 1. | Remove the bumper cover. (Refer to Body - "Front Bumper Cover") (Refer to Body - "Rear Bumper Cover") |
| 2. | Disconnect the ultrasonic sensor connector (A) and remove the ultrasonic sensor (B).
|
| Installation |
| 1. | Install the ultrasonic sensor. |
| 2. | Install the bumper cover. |
