Hyundai Elantra: Parking Distance Warning (PDW) / Description and operation

Hyundai Elantra (CN7) 2021-2025 Service Manual / Advanced Driver Assistance System (ADAS) / 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

System initializing time

–	PDW-F : 500ms after IGN1+ initial D Gear + below 10 Km/h

–	PDW-R : 500ms after IGN1+ initial R Gear

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.

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.

Buzzer for sensor failure is operated once, but display is shown continuously until it is repaired completely.

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

Parking Distance Warning (PDW)

Components and components location

Component Location1. Integrated body control unit (IBU) 2. Ultrasonic sensor..

Other information:

Hyundai Elantra (CN7) 2021-2025 Owner's Manual: Function settings

Setting Rear Cross-Traffic Safety With the engine on, select ‘Driver Assistance → Parking Safety → Rear Cross- Traffic Safety’ from the Settings menu to turn on Rear Cross-Traffic Safety system and deselect to turn off the system. WARNING When the engine is restarted, Rear Cross-Traffic Safety system will always turn on. However, if ‘Off’ is selected after the engine is restart..

Hyundai Elantra (CN7) 2021-2025 Owner's Manual: Good driving practices

Never move the shift lever from P (Park) or N (Neutral) to any other position with the accelerator pedal depressed. Never move the shift lever into P (Park) when the vehicle is in motion. Be sure the vehicle is completely stopped before you attempt to shift into R (Reverse) or D (Drive). Do not move the shift lever to N (Neutral) when driving. Doing so may result in an acciden..

Tilting the sunroof

Tilt the sunroof open:

Push the sunroof control lever upward until the sunroof moves to the desired position.

To close the sunroof:

Press the sunroof lever forward until the sunroof moves to the desired position.