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Home >> Toyota >> 2020 >> RAV4 XLE, AWD >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Airbag System (W/ OCS) - Diagnostic Codes (4 Of 4) & Symptom Tests >> AIRBAG SYSTEM (w/ Occupant Classification 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) [11/2018 - 02/2019] >> 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) [11/2018 - 02/2019]: Description

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

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 No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B1860 Short in Knee Airbag (D Side) Squib Circuit One of the following conditions is met:
  • The airbag ECU assembly detects a line short circuit signal 5 times in the driver side knee squib circuit during the primary check.
  • A lower No. 1 instrument panel airbag assembly malfunction.
  • An airbag ECU assembly malfunction.
  • Instrument panel wire
  • Lower No. 1 instrument panel airbag assembly
  • Airbag ECU assembly
Comes on Applicable
B1861 Open in Knee Airbag (D Side) Squib Circuit One of the following conditions is met:
  • The airbag ECU assembly detects an open circuit signal in the driver side knee squib circuit for 2 seconds.
  • A lower No. 1 instrument panel airbag assembly malfunction.
  • An airbag ECU assembly malfunction.
  • Instrument panel wire
  • Lower No. 1 instrument panel airbag assembly
  • Airbag ECU assembly
Comes on Applicable
B1862 Short in Knee Airbag (D Side) Squib Circuit (to Ground) One of the following conditions is met:
  • The airbag ECU assembly detects a short circuit to ground signal in the driver side knee squib circuit for 0.5 seconds.
  • A lower No. 1 instrument panel airbag assembly malfunction.
  • An airbag ECU assembly malfunction.
  • Instrument panel wire
  • Lower No. 1 instrument panel airbag assembly
  • Airbag ECU assembly
Comes on Applicable
B1863 Short in Knee Airbag (D Side) Squib Circuit (to +B) One of the following conditions is met:
  • The airbag ECU assembly detects a short circuit to B+ signal in the driver side knee squib circuit for 0.5 seconds.
  • A lower No. 1 instrument panel airbag assembly malfunction.
  • An airbag ECU assembly malfunction.
  • Instrument panel wire
  • Lower No. 1 instrument panel airbag assembly
  • Airbag ECU assembly
Comes on Applicable