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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 B1810: Short in D Squib (Dual Stage - 2nd Step) Circuit; DTC B1811: Open in D Squib (Dual Stage - 2nd Step) Circuit; DTC B1812: Short in D Squib (Dual Stage - 2nd Step) Circuit (to Ground); DTC B1813: Short in D Squib (Dual Stage - 2nd Step) Circuit (to +B) [12/2019 - 11/2023] >> Description

DTC B1810: Short in D Squib (Dual Stage - 2nd Step) Circuit; DTC B1811: Open in D Squib (Dual Stage - 2nd Step) Circuit; DTC B1812: Short in D Squib (Dual Stage - 2nd Step) Circuit (to Ground); DTC B1813: Short in D Squib (Dual Stage - 2nd Step) Circuit (to +B) [12/2019 - 11/2023]: Description

The driver squib 2nd step circuit consists of the airbag sensor assembly, spiral cable sub-assembly and horn button 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 driver squib 2nd step circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B1810 Short in D Squib (Dual Stage - 2nd Step) Circuit
  • The airbag sensor assembly detects a line short in the driver squib 2nd step circuit during the primary check.
  • Spiral cable sub-assembly malfunction
  • Driver squib 2nd step malfunction
  • Airbag sensor assembly malfunction
  • Instrument panel wire
  • Spiral cable sub-assembly
  • Driver squib 2nd step (Horn button assembly)
  • Airbag sensor assembly
 Comes on Applies to check mode
B1811 Open in D Squib (Dual Stage - 2nd Step) Circuit
  • The airbag sensor assembly detects an open in the driver squib 2nd step circuit.
  • Spiral cable sub-assembly malfunction
  • Driver squib 2nd step malfunction
  • Airbag sensor assembly malfunction
  • Instrument panel wire
  • Spiral cable sub-assembly
  • Driver squib 2nd step (Horn button assembly)
  • Airbag sensor assembly
 Comes on Applies to check mode
B1812 Short in D Squib (Dual Stage - 2nd Step) Circuit (to Ground)
  • The airbag sensor assembly detects a short to ground in the driver squib 2nd step circuit.
  • Spiral cable sub-assembly malfunction
  • Driver squib 2nd step malfunction
  • Airbag sensor assembly malfunction
  • Instrument panel wire
  • Spiral cable sub-assembly
  • Driver squib 2nd step (Horn button assembly)
  • Airbag sensor assembly
 Comes on Applies to check mode
B1813 Short in D Squib (Dual Stage - 2nd Step) Circuit (to +B)
  • The airbag sensor assembly detects a short to B+ in the driver squib 2nd step circuit.
  • Spiral cable sub-assembly malfunction
  • Driver squib 2nd step malfunction
  • Airbag sensor assembly malfunction
  • Instrument panel wire
  • Spiral cable sub-assembly
  • Driver squib 2nd step (Horn button assembly)
  • Airbag sensor assembly
 Comes on Applies to check mode
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