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Home >> Toyota >> 2020 >> Prius Limited >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Supplemental Restraint System - Diagnostic Codes (5 Of 5) & Symptom Tests >> Airbag System >> DTC B1860/64: Short in Driver Side Knee Airbag Squib Circuit; DTC B1861/64: Open in Driver Side Knee Airbag Squib Circuit; DTC B1862/64: Short to GND in Driver Side Knee Airbag Squib Circuit; DTC B1863/64: Short to B+ in Driver Side Knee Airbag Squib Circuit [11/2015 - 12/2018] >> Description

DTC B1860/64: Short in Driver Side Knee Airbag Squib Circuit; DTC B1861/64: Open in Driver Side Knee Airbag Squib Circuit; DTC B1862/64: Short to GND in Driver Side Knee Airbag Squib Circuit; DTC B1863/64: Short to B+ in Driver Side Knee Airbag Squib Circuit [11/2015 - 12/2018]: Description

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 Test Mode / Check Mode
B1860/64 Short in Driver Side Knee Airbag 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
Applies to check mode
B1861/64 Open in Driver Side Knee Airbag 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
Applies to check mode
B1862/64 Short to GND in Driver Side Knee Airbag Squib Circuit
  • 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
Applies to check mode
B1863/64 Short to B+ in Driver Side Knee Airbag Squib Circuit
  • 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
Applies to check mode