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Home >> Lexus >> 2021 >> GX 460 Luxury >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Supplemental Restraint System (Diagnostic Codes) (3 Of 3) & Symptom Tests >> Airbag System >> DTC B1860: Short in Knee Airbag (D Side) Squib Circuit; DTC B1861: Open in Knee Airbag (D Side) Squib Circuit; DTC B1862: Short in Knee Airbag (D Side) Squib Circuit (to Ground); DTC B1863: Short in Knee Airbag (D Side) Squib Circuit (to +B) [08/2019 - ] >> Description

DTC B1860: Short in Knee Airbag (D Side) Squib Circuit; DTC B1861: Open in Knee Airbag (D Side) Squib Circuit; DTC B1862: Short in Knee Airbag (D Side) Squib Circuit (to Ground); DTC B1863: Short in Knee Airbag (D Side) Squib Circuit (to +B) [08/2019 - ]: Description

The driver side knee squib circuit consists of the center airbag sensor and lower No. 1 instrument panel airbag.

This circuit instructs the SRS to deploy when deployment conditions are met.

These DTCs are stored when a malfunction is detected in the driver side knee squib circuit.

DTC Code DTC Detection Condition Trouble Area
B1860 One of the following conditions is met:
  • The center airbag sensor detects a line short circuit signal 5 times in the driver side knee squib circuit during the primary check.
  • A driver side knee squib malfunction.
  • A center airbag sensor malfunction.
  • Instrument panel wire
  • Lower No. 1 instrument panel airbag assembly (Driver side knee squib)
  • Center airbag sensor assembly
B1861 One of the following conditions is met:
  • The center airbag sensor detects an open circuit signal in the driver side knee squib circuit for 2 seconds.
  • A driver side knee squib malfunction.
  • A center airbag sensor malfunction.
  • Instrument panel wire
  • Lower No. 1 instrument panel airbag assembly (Driver side knee squib)
  • Center airbag sensor assembly
B1862 One of the following conditions is met:
  • The airbag sensor center detects a short circuit to ground signal in the driver side knee squib circuit for 0.5 seconds.
  • A driver side knee squib malfunction.
  • A center airbag sensor malfunction.
  • Instrument panel wire
  • Lower No. 1 instrument panel airbag assembly (Driver side knee squib)
  • Center airbag sensor assembly
B1863 One of the following conditions is met:
  • The airbag sensor center detects a short circuit to B+ signal in the driver side knee squib circuit for 0.5 seconds.
  • A driver side knee squib malfunction.
  • A center airbag sensor malfunction.
  • Instrument panel wire
  • Lower No. 1 instrument panel airbag assembly (Driver side knee squib)
  • Center airbag sensor assembly
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