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Home >> Toyota >> 2017 >> 4Runner TRD Pro >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Airbag System - Diagnostic Codes (B1690-B1905) & 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 airbag sensor assembly 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 airbag sensor assembly 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.
  • An airbag sensor assembly malfunction.
  • Instrument panel wire
  • Lower No. 1 instrument panel airbag assembly (Driver side knee squib)
  • Airbag sensor assembly
B1861 One of the following conditions is met:
  • The airbag sensor assembly detects an open circuit signal in the driver side knee squib circuit for 2 seconds.
  • A driver side knee squib malfunction.
  • An airbag sensor assembly malfunction.
  • Instrument panel wire
  • Lower No. 1 instrument panel airbag assembly (Driver side knee squib)
  • Airbag sensor assembly
B1862 One of the following conditions is met:
  • The airbag sensor assembly detects a short circuit to ground signal in the driver side knee squib circuit for 0.5 seconds.
  • A driver side knee squib malfunction.
  • An airbag sensor assembly malfunction.
  • Instrument panel wire
  • Lower No. 1 instrument panel airbag assembly (Driver side knee squib)
  • Airbag sensor assembly
B1863 One of the following conditions is met:
  • The airbag sensor assembly detects a short circuit to B+ signal in the driver side knee squib circuit for 0.5 seconds.
  • A driver side knee squib malfunction.
  • An airbag sensor assembly malfunction.
  • Instrument panel wire
  • Lower No. 1 instrument panel airbag assembly (Driver side knee squib)
  • Airbag sensor assembly