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Home >> Lexus >> 2013 >> ES 300h >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Supplemental Restraint System (Diagnostic Codes (B1650/32 - B1928/78) & Symptom Tests)) >> 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 >> 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: Description

The driver side squib circuit consists of the airbag sensor assembly, spiral cable with sensor 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. DTC Detection Condition Trouble Area
B1800/51
  • The airbag sensor assembly receives a line short circuit signal in the driver side squib circuit during primary check.
  • Spiral cable with sensor sub-assembly malfunction
  • Driver side squib malfunction
  • Airbag sensor assembly malfunction
  • Instrument panel wire
  • Spiral cable with sensor sub-assembly
  • Horn button assembly (Driver side squib)
  • Airbag sensor assembly
B1801/51
  • The airbag sensor assembly receives an open circuit signal in the driver side squib circuit.
  • Spiral cable with sensor sub-assembly malfunction
  • Driver side squib malfunction
  • Airbag sensor assembly malfunction
B1802/51
  • The airbag sensor assembly receives a short circuit to ground signal in the driver side squib circuit.
  • Spiral cable with sensor sub-assembly malfunction
  • Driver side squib malfunction
  • Airbag sensor assembly malfunction
B1803/51
  • The airbag sensor assembly receives a short circuit to B+ signal in the driver side squib circuit.
  • Spiral cable with sensor sub-assembly malfunction
  • Driver side squib malfunction
  • Airbag sensor assembly malfunction