RSIS (Right Side Impact Sensor) – Function, Symptoms, Location, Diagnosis, and Possible DTCs

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RSIS (Right Side Impact Sensor) – Function, Symptoms, Location, Diagnosis, and Possible DTCs

The RSIS (Right Side Impact Sensor) is a critical component of the Supplemental Restraint System (SRS). It detects impacts on the right side of the vehicle and transmits crash data to the Airbag Control Module (ACM), helping determine whether the side airbags and seat belt pretensioners should deploy.

What Does RSIS Stand For?

RSIS = Right Side Impact Sensor

Main Functions

  • Detects right-side collision forces.
  • Sends impact information to the Airbag Control Module.
  • Supports side airbag deployment decisions.
  • Works with front impact and rollover sensors.

Common Symptoms

  • Airbag warning light remains ON.
  • SRS fault codes stored in memory.
  • Right side airbag disabled.
  • Communication or sensor circuit faults.

Typical Location

The RSIS is commonly mounted inside the right B-pillar, right front door, right rear door, or lower body structure. The exact location varies depending on the vehicle manufacturer and model.

Simple Signal Diagram

 Right Side Impact
        │
        ▼
+------------------+
|       RSIS       |
+------------------+
        │ Signal
        ▼
+------------------+
| Airbag Control   |
| Module (ACM)     |
+------------------+
        │
        ▼
 Right Side Airbag
 Pretensioner

Possible Diagnostic Trouble Codes (DTCs)

  • B0092 – Right Side Impact Sensor
  • B0093 – Right Side Impact Sensor Circuit
  • B1620 – Side Impact Sensor Circuit Fault
  • B1621 – Side Impact Sensor Signal Fault
  • B1631 – Right Side Impact Sensor Fault
  • Manufacturer-specific SRS communication codes

Diagnosis Tips

  • Scan the SRS system using a professional diagnostic tool.
  • Inspect the RSIS connector for corrosion or damaged terminals.
  • Check the wiring harness for continuity and short circuits.
  • Replace the sensor if an internal failure is confirmed.

Important Note

The sensor location, wiring, connector pinout, and DTC definitions vary by vehicle manufacturer and model. Always refer to the factory service manual before performing diagnosis or replacement.

Related SRS Components

  • LSIS – Left Side Impact Sensor
  • FIS – Front Impact Sensor
  • RFIS – Right Front Impact Sensor
  • LFIS – Left Front Impact Sensor
  • ACM – Airbag Control Module

Frequently Asked Questions

Can a faulty RSIS illuminate the airbag warning light?

Yes. A malfunctioning RSIS commonly triggers the SRS warning light and stores diagnostic trouble codes.

Can the RSIS be repaired?

Most vehicle manufacturers recommend replacing a faulty side impact sensor instead of repairing it.

Is the RSIS location the same on every vehicle?

No. The mounting location and electrical configuration differ between manufacturers and vehicle models.

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