Hyundai Accent (HC): Advanced Driver Assistance System (ADAS) / Parking Distance Warning (PDW)

Hyundai Accent (HC) (2017 - 2022) Service Manual / Advanced Driver Assistance System (ADAS) / Parking Distance Warning (PDW)

Contents:

Specifications
Components and Components Location
Description and Operation
Parking Distance Warning (PDW) Sensor

Specifications

- Specifications

Item		Specification
Ultrasonic sensor	Voltage rating	DC 12 V
	Detecting range	30 cm - 120 cm
	Operation voltage	DC 9 - 16 V
	Operation current	MAX 350 mA
	Operation temperature	-30°C to +80°C
	Operation frequency	48 ± 5 KHz
	Number of sensors	4 (Left side, Left center, Right center, Right side)

Parking distance warning (PDW) control unit function is built in BCM (Body control unit).

Components and Components Location

- Component Location

1. Body control unit (BCM)
2. Parking distance warning sensor

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

– 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 BCM.

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.

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	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) Sensor

- Circuit Diagram

- Removal Parking Distance Warning-Forward (PDW-F) Sensor

1.Remove the bumper cover.(Refer to Body - "Front Bumper Cover")(Refer to Body - "Rear Bumper Cover")

2.Disconnect the connector (A) from the PDW sensor (B).

- Installation

1.Install the PDW sensor.

2.Install the bumper cover.

General Information

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Specifications
Components and Components Location
Description and Operation
Parking Distance Warning (PDW) Sensor