Kia Optima: SRSCM / Side Impact Sensor (SIS)

Kia Optima DL3 2019-2021 Service and Repair Manual / Restraint / SRSCM / Side Impact Sensor (SIS)

Description and operation
Description

The Side Impact Sensor (SIS) system consists of two kinds of side impact sensor which are installed at each center of the front door module (left and right) and two rear sensors which are installed in the rear pillar (left and right).

The Front Side Impact Sensor is also called P-SIS because it detects pressure due to collision at its mounting location.

The Rear Side Impact Sensor is also called A-SIS because it detects acceleration due to collision at its mounting location.

SRSCM decides deployment of the airbag and the time of deployment through the collision signal of the SIS when collision occurrs.

Components and components location
Components Location

1. Pressure Side Impact Sensor
2. Gravity Side Impact Sensor

Repair procedures
Removal

Gravity Acceleration side impact sensor (G-SIS)

1.

Disconnect the negative battery terminal.

  

After disconnecting the cables, wait at least 3 minutes.

2.

Remove the center pillar trim.

(Refer to Body - "Center Pillar Trim")

3.

Remove the gravity side impact sensor (A) by loosening the bolt and then disconnect the connector (B).

Tightening torque :

6.9 - 11.8 N·m (0.7 - 0.8 kgf·m, 5.0 - 5.8 lb·ft, 60.8 - 69.4 lb·in)

Pressure Side Impact Sensor (P-SIS)

1.

Disconnect the negative battery terminal.

  

After disconnecting the cables, wait at least 3 minutes.

2.

Remove the front door trim.

(Refer to Body - "Front Door Trim")

3.

Remove the connector (A) and turn it counterclockwise to remove the pressure side impact sensor (B).

Tightening torque :

2.0 - 2.9 N·m (0.2 - 0.3 kgf·m, 1.4 - 2.2 lb·ft, 17.4 - 26.0 lb·in)

Installation
  

Do not turn the ignition switch ON and do not connect the battery cable while replacing the side impact sensor.

Pressure Side Impact Sensor [P-SIS (Door)]

1.

Install the new front side impact sensor with the screws, then connect the front side impact sensor connector.

Tightening torque :

6.9 - 11.8 N·m (0.7 - 0.8 kgf·m, 5.0 - 5.8 lb·ft, 60.8 - 69.4 lb·in)

  

Use specified bolts only.

2.

Install the front door trim.

(Refer to Body - "Front Door Trim")

3.

Reconnect the battery negative cable.

4.

After installing the front side impact sensor, confirm proper system operation:

Turn the ignition switch ON; the SRS indicator light should turn on for about six seconds and then go off.

Gravity Side Impact Sensor [G-SIS (B-Pillar)]

  

Do not turn the ignition switch ON and do not connect the battery cable while replacing the side impact sensor.

1.

Install the side impact sensor with the bolt then connect the side impact sensor connector.

Tightening torque :

2.0 - 2.9 N·m (0.2 - 0.3 kgf·m, 1.4 - 2.2 lb·ft, 17.4 - 26.0 lb·in)

2.

Install the center pillar trim.

(Refer to Body - "Center Pillar Trim")

3.

Reconnect the battery negative cable.

4.

After installing the pressure side impact sensor, confirm proper system operation:

Turn the ignition switch ON; the SRS indicator light should be turned on for about six seconds and then go off.

  

You must comply with the specified tightening torques with the tool specified because Gravity – Side Impact Sensors (G-SIS) may be broken or POP-NUT may be rotated.

Problems may be occurred in the durability of G-SIS or impact sensing performance may be depreciated if POP-NUT is rotated.

The door module must not be transformed because SRSCM judges a impact through the pressure sensor in the door module.

Front Impact Sensor (FIS)
Description and operation Description The front impact sensor (FIS) is installed in the Front End Module (FEM). They are remote sensors that detect acceleration due to a collision at i ...

Airbag Module
...

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