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Home >> Scion >> 2013 >> iQ EV >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Supplemental Restraint System (Diagnostic Codes B1693/81 - B1907/74 & Symptom Tests) (Electric) >> 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 >> 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: Description

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

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

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

DTC No. DTC Detection Condition Trouble Area
B1860/64
  • The airbag ECU assembly receives a line short circuit signal in the driver side knee airbag squib circuit during primary check.
  • Driver side knee airbag squib malfunction
  • Airbag ECU assembly malfunction
  • Instrument panel wire
  • Lower No. 1 instrument panel airbag assembly (Driver side knee airbag squib)
  • Airbag ECU assembly
B1861/64
  • The airbag ECU assembly receives an open circuit signal in the driver side knee airbag squib circuit.
  • Driver side knee airbag squib malfunction
  • Airbag ECU assembly malfunction
B1862/64
  • The airbag ECU assembly receives a short circuit to ground signal in the driver side knee airbag squib circuit.
  • Driver side knee airbag squib malfunction
  • Airbag ECU assembly malfunction
B1863/64
  • The airbag ECU assembly receives a short circuit to B+ signal in the driver side knee airbag squib circuit.
  • Driver side knee airbag squib malfunction
  • Airbag ECU assembly malfunction