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Home >> Toyota >> 2022 >> RAV4 LE, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 77 (Airbag System (W/ OCS) - Diagnostic Codes (2 Of 4)) >> AIRBAG SYSTEM (w/ Occupant Classification System) >> DTC B1635: Curtain Shield Airbag Sensor (LH); DTC B1637: Curtain Shield Airbag Sensor Lost Communication (LH) [02/2019 - 08/2020] >> Description

DTC B1635: Curtain Shield Airbag Sensor (LH); DTC B1637: Curtain Shield Airbag Sensor Lost Communication (LH) [02/2019 - 08/2020]: Description

WARNING: This page is about a different car, the 2020 Toyota RAV4 and 2019 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.

The side collision sensor LH circuit consists of the airbag ECU assembly, side airbag pressure sensor LH and No. 2 side airbag sensor assembly LH.

The No. 2 side airbag sensor assembly LH detects impacts to the vehicle and send signals to the airbag ECU assembly to determine if the SRS should be deployed.

These DTCs are stored when a malfunction is detected in the No. 2 side airbag sensor assembly LH or airbag ECU assembly.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B1635 Curtain Shield Airbag Sensor (LH) Either condition is met:
  • A No. 2 side airbag sensor assembly LH malfunction.
  • An airbag ECU assembly malfunction.
  • No. 2 side airbag sensor assembly LH
  • Airbag ECU assembly
Comes on Not applicable
B1637 Curtain Shield Airbag Sensor Lost Communication (LH) Either condition is met:
  • A No. 2 side airbag sensor assembly LH malfunction.
  • An airbag ECU assembly malfunction.
  • No. 2 side airbag sensor assembly LH
  • Airbag ECU assembly
Comes on Not applicable