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)]

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).

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.

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).

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.

❮Airbag Module Disposal

Description and operation Airbag Disposal When you scrap a vehicle equipped with an airbag, you must deploy it first.When you deploy an airbag, you need to have a skilled mechanic do the work.

Brake System❯

Other information:

Hyundai Elantra (CN7) 2021-2026 Service Manual: Auto Lighting Control System

Description and operation DescriptionIt's a system that uses illumination sensor to automatically turn ON the tail lamp and head lamp based on the change in surrounding environment's illumination condition. It activates when the vehicle enters/exits tunnel, or when the illumination condition in surrounding environment changes due to rain, snow, or

Hyundai Elantra (CN7) 2021-2026 Service Manual: Temperature Control Actuator

Description and operation DescriptionThe temperature control actuator is located at the heater unit. It regulates the temperature by the procedure as follows. The signal from the control unit adjusts the position of the temperature door by operating the temperature switch.