• The front impact sensors (FIS) are installed on the upper of the side panel in Front End Module (FEM). They are remote sensors that detect acceleration due to a collision at their mounting locations.
• The primary purpose of the Front Impact Sensor (FIS) is to provide an indication of a collition. The Front Impact Sensor(FIS) sends acceleration data to the SRSCM.

1. Front Impact Sensor (FIS) [RH]
2. Front Impact Sensor (FIS) [LH]
1.Disconnect the battery negative terminal.
• After disconnecting the cables, wait at least 3 minutes.
2.Remove the front impact sensor assembly (B) by loosening the bolt after disconnecting the connector (A).
Tightening torque :10.8 - 12.8 N.m (1.1 - 1.3 kgf.m, 8.0 - 9.4 lb-ft)

1.Install in the reverse of the removal.
2.After installing the FIS, confirm proper system operation.
• Switch ON the ignition. The SRS indicator light should turn on for about three-six seconds and then off.
SRS Control Module (SRSCM)
Side Impact Sensor (SIS)Hyundai Tucson (NX4) 2022-2026 Service Manual: Rear Combination Lamp
- Removal
• When removing with a flat-tip screwdriver or remover, wrap protective tape around the tools to prevent damage to components.
• Put on gloves to prevent hand injuries.
• Take care not to bend or scratch the bumper cover and panels.
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Hyundai Tucson (NX4) 2022-2026 Service Manual: Heater Control Unit
- Components Location
1. Heater control unit
- Component
[Connector Pin Function]
Pin NoConnector AConnector B
1Driver's mode control actuator feedbackSensor ground
2Intake actuator feedbackECV (-)
3Passenger's temperature control actuator feedbackECV (+)
4Driver's temperature co ...