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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 B1805: Short in P Squib Circuit; DTC B1806: Open in P Squib Circuit; DTC B1807: Short in P Squib Circuit (to Ground); DTC B1808: Short in P Squib Circuit (to +B) [12/2019 - 11/2023] >> Description

DTC B1805: Short in P Squib Circuit; DTC B1806: Open in P Squib Circuit; DTC B1807: Short in P Squib Circuit (to Ground); DTC B1808: Short in P Squib Circuit (to +B) [12/2019 - 11/2023]: Description

The front passenger squib circuit consists of the airbag sensor assembly and instrument panel passenger airbag assembly.

The airbag sensor assembly uses this circuit to deploy the airbag when deployment conditions are met.

These DTCs are stored when a malfunction is detected in the front passenger squib circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B1805 Short in P Squib Circuit
  • The airbag sensor assembly detects a line short in the front passenger squib circuit during the primary check.
  • Front passenger squib malfunction
  • Airbag sensor assembly malfunction
  • Instrument panel wire
  • No. 2 instrument panel wire
  • Front passenger squib (Instrument panel passenger airbag assembly)
  • Airbag sensor assembly
 Comes on Applies to check mode
B1806 Open in P Squib Circuit
  • The airbag sensor assembly detects an open in the front passenger squib circuit.
  • Front passenger squib malfunction
  • Airbag sensor assembly malfunction
  • Instrument panel wire
  • No. 2 instrument panel wire
  • Front passenger squib (Instrument panel passenger airbag assembly)
  • Airbag sensor assembly
 Comes on Applies to check mode
B1807 Short in P Squib Circuit (to Ground)
  • The airbag sensor assembly detects a short to ground in the front passenger squib circuit.
  • Front passenger squib malfunction
  • Airbag sensor assembly malfunction
  • Instrument panel wire
  • No. 2 instrument panel wire
  • Front passenger squib (Instrument panel passenger airbag assembly)
  • Airbag sensor assembly
 Comes on Applies to check mode
B1808 Short in P Squib Circuit (to +B)
  • The airbag sensor assembly detects a short to B+ in the front passenger squib circuit.
  • Front passenger squib malfunction
  • Airbag sensor assembly malfunction
  • Instrument panel wire
  • No. 2 instrument panel wire
  • Front passenger squib (Instrument panel passenger airbag assembly)
  • Airbag sensor assembly
 Comes on Applies to check mode
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