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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Airbag System - Diagnostic Codes (7 Of 7) & Symptom Tests >> Airbag System >> DTC B1815: Short in P Squib (Dual Stage - 2nd Step) Circuit; DTC B1816: Open in P Squib (Dual Stage - 2nd Step) Circuit; DTC B1817: Short in P Squib (Dual Stage - 2nd Step) Circuit (to Ground); DTC B1818: Short in P Squib (Dual Stage - 2nd Step) Circuit (to +B) [12/2019 - 11/2023] >> Description

DTC B1815: Short in P Squib (Dual Stage - 2nd Step) Circuit; DTC B1816: Open in P Squib (Dual Stage - 2nd Step) Circuit; DTC B1817: Short in P Squib (Dual Stage - 2nd Step) Circuit (to Ground); DTC B1818: Short in P Squib (Dual Stage - 2nd Step) Circuit (to +B) [12/2019 - 11/2023]: Description

The front passenger squib 2nd step 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 2nd step circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B1815 Short in P Squib (Dual Stage - 2nd Step) Circuit
  • The airbag sensor assembly detects a line short in the front passenger squib 2nd step circuit during the primary check.
  • Front passenger squib 2nd step malfunction
  • Airbag sensor assembly malfunction
  • Instrument panel wire
  • No. 2 instrument panel wire
  • Front passenger squib 2nd step (Instrument panel passenger airbag assembly)
  • Airbag sensor assembly
 Comes on Applies to check mode
B1816 Open in P Squib (Dual Stage - 2nd Step) Circuit
  • The airbag sensor assembly detects an open in the front passenger squib 2nd step circuit.
  • Front passenger squib 2nd step malfunction
  • Airbag sensor assembly malfunction
  • Instrument panel wire
  • No. 2 instrument panel wire
  • Front passenger squib 2nd step (Instrument panel passenger airbag assembly)
  • Airbag sensor assembly
 Comes on Applies to check mode
B1817 Short in P Squib (Dual Stage - 2nd Step) Circuit (to Ground)
  • The airbag sensor assembly detects a short to ground in the front passenger squib 2nd step circuit.
  • Front passenger squib 2nd step malfunction
  • Airbag sensor assembly malfunction
  • Instrument panel wire
  • No. 2 instrument panel wire
  • Front passenger squib 2nd step (Instrument panel passenger airbag assembly)
  • Airbag sensor assembly
 Comes on Applies to check mode
B1818 Short in P Squib (Dual Stage - 2nd Step) Circuit (to +B)
  • The airbag sensor assembly detects a short to B+ in the front passenger squib 2nd step circuit.
  • Front passenger squib 2nd step malfunction
  • Airbag sensor assembly malfunction
  • Instrument panel wire
  • No. 2 instrument panel wire
  • Front passenger squib 2nd step (Instrument panel passenger airbag assembly)
  • Airbag sensor assembly
 Comes on Applies to check mode
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