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Home >> Toyota >> 2019 >> Highlander Limited, FWD >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Supplemental Restraint System - Diagnostic Codes - (Except Hybrid) >> Airbag System >> DTC B1800-51: Short in Driver Side Squib Circuit; DTC B1801-51: Open in Driver Side Squib Circuit; DTC B1802-51: Short to GND in Driver Side Squib Circuit; DTC B1803-51: Short to B+ in Driver Side Squib Circuit [12/2013 - ] >> Description

DTC B1800-51: Short in Driver Side Squib Circuit; DTC B1801-51: Open in Driver Side Squib Circuit; DTC B1802-51: Short to GND in Driver Side Squib Circuit; DTC B1803-51: Short to B+ in Driver Side Squib Circuit [12/2013 - ]: Description

The driver side squib 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 side squib circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area Test Mode / Check Mode
B1800-51 Short in Driver Side Squib Circuit
  • The airbag sensor assembly detects a line short in the driver side squib circuit during primary check.
  • Spiral cable sub-assembly malfunction
  • Driver side squib malfunction
  • Airbag sensor assembly malfunction
  • Instrument panel wire
  • Spiral cable sub-assembly
  • Driver side squib (Horn button assembly)
  • Airbag sensor assembly
Applies to check mode
B1801-51 Open in Driver Side Squib Circuit
  • The airbag sensor assembly detects an open in the driver side squib circuit.
  • Spiral cable sub-assembly malfunction
  • Driver side squib malfunction
  • Airbag sensor assembly malfunction
  • Instrument panel wire
  • Spiral cable sub-assembly
  • Driver side squib (Horn button assembly)
  • Airbag sensor assembly
Applies to check mode
B1802-51 Short to GND in Driver Side Squib Circuit
  • The airbag sensor assembly detects a short to ground in the driver side squib circuit.
  • Spiral cable sub-assembly malfunction
  • Driver side squib malfunction
  • Airbag sensor assembly malfunction
  • Instrument panel wire
  • Spiral cable sub-assembly
  • Driver side squib (Horn button assembly)
  • Airbag sensor assembly
Applies to check mode
B1803-51 Short to B+ in Driver Side Squib Circuit
  • The airbag sensor assembly detects a short to B+ in the driver side squib circuit.
  • Spiral cable sub-assembly malfunction
  • Driver side squib malfunction
  • Airbag sensor assembly malfunction
  • Instrument panel wire
  • Spiral cable sub-assembly
  • Driver side squib (Horn button assembly)
  • Airbag sensor assembly
Applies to check mode