Hyundai Elantra (CN7): Restraint / Seat Belt Pretensioner. Seat Belt Pretensioner (BPT)

Hyundai Elantra (CN7) 2021-2026 Service Manual / Restraint / Seat Belt Pretensioner. Seat Belt Pretensioner (BPT)

Description and operation

Description
The Seat Belt Pretensioners (BPT) are installed inside center pillar (LH & RH). When a vehicle crashes with a certain degree of frontal impact, the pretensioner seat belt helps to reduce the severity of injury to the front seat occupants by retracting the seat belt webbing. This prevents the front occupants from thrusting forward and hitting the steering wheel or the instrument panel when the vehicle crashes.
   
•
Never attempt to measure the circuit resistance of the Seat Belt Pretensioner (BPT) even if you are using a specified tester. If the circuit resistance is measured with a tester, the pretensioner will be ignited accidentally. This will result in serious personal injury.

Components and components location

Components

1. Front seat Belt Pretensioner (BPT)
2. Rear seat Belt Pretensioner (BPT)

Repair procedures

Removal
[Front Seat Belt Pretensioner (BPT)]
1.
Disconnect the negative (-) battery terminal.
2.
Remove the door scuff trim.
(Refer to Body (Interior and Exterior) - "Door Scuff Trim")
3.
Remove the center pillar lower trim.
(Refer to Body (Interior and Exterior) - "Center Pillar Trim")
4.
Remove the center pillar upper trim.
(Refer to Body (Interior and Exterior) - "Center Pillar Trim")
5.
Remove the front seat belt upper anchor (A) after loosening the mounting bolt.

6.
Separate the BPT connector (A) and PSB connector (B).

7.
Loosen the mounting bolts (B,C), remove the front seat belt pretensioner (A).

[Rear Seat Belt Pretensioner (BPT)]
1.
Remove the rear package tray trim.
(Refer to Body (Interior and Exterior) - "Rear Package Tray Trim")
2.
Disconnect the airbag connector (A) after pushing the lock pin.

3.
Remove the rear seat belt pretensioner (A) after loosening the mounting bolt.

Installation
[Front Seat Belt Pretensioner (BPT)]
1.
Install the front seat belt pretensioner (A).
Tightening torque :
Bolt B : 7.8 - 11.8 N.m (0.8 - 1.2 kgf.m, 5.8 - 8.7 lb-ft)
Bolt C : 39.2 - 53.9 N.m (4.0 - 5.5 kgf.m, 28.9 - 39.8 lb-ft)

2.
Connect the BPT connector (A) and PSB connector (B).

3.
Install the front seat belt upper anchor (A) bolt.
Tightening torque :
39.2 - 53.9 N.m (4.0 - 5.5 kgf.m, 28.9 - 39.8 lb-ft)

4.
Install the center pillar upper trim.
(Refer to Body (Interior and Exterior) - "Center Pillar Trim")
5.
Install the center pillar lower trim.
(Refer to Body (Interior and Exterior) - "Center Pillar Trim")
6.
Install the door scuff trim.
(Refer to Body (Interior and Exterior) - "Door Scuff Trim")
7.
Reconnect the negative (-) battery terminal.
8.
After installing the seat belt pretensioner, confirm proper system operation.
   
•
Turn the ignition switch ON the airbag warning lamp should be turned on for about 6 seconds and then go off.
[Rear Seat Belt Pretensioner (BPT)]
1.
Tighten the mounting bolt and install the rear seat belt pretensioner (A).

2.
Connect the airbag connector (A).

3.
To install, reverse the removal procedures.
   
•
Turn the ignition switch ON the airbag warning lamp should be turned on for about 6 seconds and then go off.

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