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

Contents:

Specifications

- Specifications

ItemSpecification
Ultrasonic sensorVoltage ratingDC 12 V
Detecting range30 cm - 120 cm
Operation voltageDC 9 - 16 V
Operation currentMAX 350 mA
Operation temperature-30°C to +80°C
Operation frequency48 ± 5 KHz
Number of sensors4 (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
LevelDistance rangeAllowed range
1 Rear : 61 - 120 cm (24.02 - 47.2 in.)± 15 cm (5.90 in.)
231 - 60 cm (12.20 - 23.62 in.)± 15 cm (5.90 in.)
30 - 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.

Other information:

Hyundai Accent (HC) (2017 - 2022) Service Manual: Heater Unit

- Component Location 1. Heater unit assembly - Compoents 1. Heater core cover2. Heater core & seal assembly3. Heater case [LH]4. Mode control actuator5. Air guide [LH]6. Heater unit pad7. Deforster door assembly8. Vent door assembly9. Floor door assembly10. Temperature door assembly11. Lower case12. Drain hose13. Heater case [RH]14.

Hyundai Accent (HC) (2017 - 2022) Service Manual: Auto Defoging Actuator

- Components Location 1. Auto logging actuator - Description The auto defogging sensor is installed on front window glass. The sensor judges and sends signal if moisture occurs to blow out wind for defogging. The air conditioner control module receives a signal from the sensor and restrains moisture and eliminates defog by the intake actuator, A/C, auto defogging actuator, blower motor rpm and mode actuator.

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