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Home >> Toyota >> 2021 >> 4Runner Trail, 4WD >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Airbag System - Diagnostic Codes (B100-B1690) >> Airbag System >> DTC B1630: Curtain Shield Airbag Sensor (RH); DTC B1632: Curtain Shield Airbag Sensor Lost Communication (RH); DTC B1635: Curtain Shield Airbag Sensor (LH); DTC B1637: Curtain Shield Airbag Sensor Lost Communication (LH) [08/2019 - ] >> Description

DTC B1630: Curtain Shield Airbag Sensor (RH); DTC B1632: Curtain Shield Airbag Sensor Lost Communication (RH); DTC B1635: Curtain Shield Airbag Sensor (LH); DTC B1637: Curtain Shield Airbag Sensor Lost Communication (LH) [08/2019 - ]: Description

The rear airbag sensor consists of the safing sensor, diagnostic circuit, lateral deceleration sensor, etc.

If the airbag sensor assembly receives signals from the lateral deceleration sensor, it determines whether the SRS should be activated.

These DTCs are stored when a malfunction is detected in the rear airbag sensor circuit.

DTC Code DTC Detection Condition Trouble Area
B1630 Either condition is met:
  • A rear airbag sensor RH malfunction.
  • An airbag sensor assembly malfunction.
  • Rear airbag sensor RH
  • Airbag sensor assembly
B1632 Either condition is met:
  • A rear airbag sensor RH malfunction.
  • An airbag sensor assembly malfunction.
  • Rear airbag sensor RH
  • Airbag sensor assembly
B1635 Either condition is met:
  • A rear airbag sensor LH malfunction.
  • An airbag sensor assembly malfunction.
  • Rear airbag sensor LH
  • Airbag sensor assembly
B1637 Either condition is met:
  • A rear airbag sensor LH malfunction.
  • An airbag sensor assembly malfunction.
  • Rear airbag sensor LH
  • Airbag sensor assembly