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Home >> Toyota >> 2021 >> Prius 2020 Edition >> Repair and Diagnosis >> External Pages >> Different car >> Section 255 (Supplemental Restraint System - Diagnostic Codes (B1660-U0154) & Symptom Tests (Except Hybrid)) >> AIRBAG SYSTEM (for Gasoline Model) >> 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) [04/2018 -] >> 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) [04/2018 -]: Description

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

The airbag ECU 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 knee airbag squib circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B1860 Short in Knee Airbag (D Side) Squib Circuit
  • The airbag ECU assembly detects a line short in the driver side knee airbag squib during the primary check.
  • Driver side knee airbag squib malfunction
  • Airbag ECU assembly malfunction
  • Instrument panel wire
  • Driver side knee airbag squib (Lower No. 1 instrument panel airbag assembly)
  • Airbag ECU assembly
Comes on Applies to check mode
B1861 Open in Knee Airbag (D Side) Squib Circuit
  • The airbag ECU assembly detects an open in the driver side knee airbag squib.
  • Driver side knee airbag squib malfunction
  • Airbag ECU assembly malfunction
  • Instrument panel wire
  • Driver side knee airbag squib (Lower No. 1 instrument panel airbag assembly)
  • Airbag ECU assembly
Comes on Applies to check mode
B1862 Short in Knee Airbag (D Side) Squib Circuit (to Ground)
  • The airbag ECU assembly detects a short to ground in the driver side knee airbag squib.
  • Driver side knee airbag squib malfunction
  • Airbag ECU assembly malfunction
  • Instrument panel wire
  • Driver side knee airbag squib (Lower No. 1 instrument panel airbag assembly)
  • Airbag ECU assembly
Comes on Applies to check mode
B1863 Short in Knee Airbag (D Side) Squib Circuit (to +B)
  • The airbag ECU assembly detects a short to B+ in the driver side knee airbag squib.
  • Driver side knee airbag squib malfunction
  • Airbag ECU assembly malfunction
  • Instrument panel wire
  • Driver side knee airbag squib (Lower No. 1 instrument panel airbag assembly)
  • Airbag ECU assembly
Comes on Applies to check mode