Hyundai Elantra: Seat Belt Pretensioner / Emergency Fastening Device (EFD) Repair procedures

Hyundai Elantra AD (2016-2020) Service Manual / Restraint / Seat Belt Pretensioner / Emergency Fastening Device (EFD) Repair procedures

Removal
1.
Disconnect the battery negative cable and wait for at least 3 minutes before beginning work.
2.
Remove the front seat.
(Refer to Body - "Front Seat Assembly")
3.
Remove the rear seat.
(Refer to Body - "Rear Seat Assembly")
4.
Separate the front seat belt (A) from the emergency fastening device.

5.
Remove the door scuff trim.
(Refer to Body - "Interior Trim")
6.
Remove the center pillar trim.
(Refer to Body - "Interior Trim")
7.
Remove the floor carpet assembly.
(Refer to Body - "Floor Carpet")
8.
Disconnect the emergency fastening device connector (A).

9.
Remove the emergency fastening device (A) after loosening the monuting bolt.

Installation
1.
Disconnect the negative (-) cable from battery and wait for at least three minutes.
2.
Install the emergency fastening device with the mounting bolt.

Tightening torque :
39.2 ~ 53.9 N.m (4.0 ~ 5.5 kgf.m, 28.9 ~ 39.8 lb-ft)

3.
Connect the emergency fastening device connector (A).
   
Make sure the lock pin is connected in properly.
4.
Install the floor carpet assembly.
(Refer to Body - "Floor Carpet")
5.
Install the center pillar trim.
(Refer to Body - "Interior Trim")
6.
Install the door scuff trim.
(Refer to Body - "Interior Trim")
7.
Connect the front seat belt to the emergency fastening device.
8.
Install the rear seat.
(Refer to Body - "Rear Seat Assembly")
9.
Install the front seat.
(Refer to Body - "Front Seat Assembly")
10.
Reconnect the battery negative cable.
11.
After installing the EFD system, confirm proper system operation :
Turn the ignition switch ON; the SRS indicator light should turn on for about six seconds and then go off.
Emergency Fastening Device (EFD) Description and Operation
Description The Emergency Fastening Device (EFD) operates at the same time with the Seat Belt Pretensioner when it satisifies the deployment condition after a collision. It is an auxiliary equi ...

Brake System
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Other information:

Hyundai Elantra AD (2016-2020) Service Manual: Specifications
Specification ItemSpecificationUltrasonic sensorVoltage ratingDC 12VDetecting rangeF PAS : 100 / 60 /30cmR PAS : 120 / 60 /30cmOperation voltageDC 9 ~ 16VOperation currentMAX 350mAOperation temperature-30°C ~ +80°C (-22°C ~ +176°C)Operation frequency48 ± 5KHzNumber of sensors8EA ...

Hyundai Elantra AD (2016-2020) Service Manual: Ambient Temperature Sensor Repair procedures
Inspection 1. Check the resistance of the ambient temperature sensor between terminals 1 and 2 whether it changes by changing the ambient temperature. 1. Ambient Sensor (+)2. Sensor ground Specification Ambient temperature [°C (°F)] Resistance between terminal 1 and 2 (k?)-30 (-22)4 ...

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