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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Airbag System - Diagnostic Codes (6 Of 7) >> Airbag System >> DTC B163B: Side Airbag Sensor Assembly No. 2 Lost Communication (LH); DTC B163C: Side Airbag Sensor Assembly No. 2 Initialization Error (LH); DTC B1699: No. 2 Side Satellite Sensor Bus LH Initialization Incomplete [12/2019 - 11/2023] >> Description

DTC B163B: Side Airbag Sensor Assembly No. 2 Lost Communication (LH); DTC B163C: Side Airbag Sensor Assembly No. 2 Initialization Error (LH); DTC B1699: No. 2 Side Satellite Sensor Bus LH Initialization Incomplete [12/2019 - 11/2023]: Description

The side collision sensor LH circuit (bus 2) consists of the airbag sensor assembly and side No. 2 airbag sensor LH.

The side No. 2 airbag sensor LH detects impacts to the vehicle and sends signals to the airbag sensor assembly to determine if the airbags and pretensioners should be deployed.

These DTCs are stored when a malfunction is detected in the side collision sensor LH circuit (bus 2).

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B163B Side Airbag Sensor Assembly No. 2 Lost Communication (LH)
  • The airbag sensor assembly detects a line short, short to ground or B+, or an open in the side collision sensor LH circuit (bus 2).
  • Side No. 2 airbag sensor LH malfunction
  • Airbag sensor assembly malfunction
  • No. 2 floor wire
  • Side No. 2 airbag sensor LH
  • Airbag sensor assembly
Comes on Does not apply to test/check mode
B163C Side Airbag Sensor Assembly No. 2 Initialization Error (LH)
  • The airbag sensor assembly detects a line short, short to ground or B+, or an open in the side collision sensor LH circuit (bus 2).
  • Side No. 2 airbag sensor LH malfunction
  • Airbag sensor assembly malfunction
  • No. 2 floor wire
  • Side No. 2 airbag sensor LH
  • Airbag sensor assembly
Comes on Does not apply to test/check mode
B1699 No. 2 Side Satellite Sensor Bus LH Initialization Incomplete
  • The airbag sensor assembly detects a line short, short to ground or B+, or an open in the side collision sensor LH circuit (bus 2).
  • Side No. 2 airbag sensor LH malfunction
  • Airbag sensor assembly malfunction
  • No. 2 floor wire
  • Side No. 2 airbag sensor LH
  • Airbag sensor assembly
Comes on Does not apply to test/check mode