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Home >> Toyota >> 2014 >> Avalon XLE >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Supplemental Restraint System (Diagnostic Codes & Symptom Tests) (Except Hybrid) >> Airbag System >> DTC B1855/63: Short in Rear Side Squib LH Circuit; DTC B1856/63: Open in Rear Side Squib LH Circuit; DTC B1857/63: Short to GND in Rear Side Squib LH Circuit; DTC B1858/63: Short to B+ in Rear Side Squib LH Circuit [10/2013 - ] >> Description

DTC B1855/63: Short in Rear Side Squib LH Circuit; DTC B1856/63: Open in Rear Side Squib LH Circuit; DTC B1857/63: Short to GND in Rear Side Squib LH Circuit; DTC B1858/63: Short to B+ in Rear Side Squib LH Circuit [10/2013 - ]: Description

The rear side squib LH circuit consists of the airbag ECU assembly and rear seat airbag assembly LH.

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 rear side squib LH circuit.

DTC No. DTC Detection Condition Trouble Area
B1855/63
  • The airbag ECU assembly detects a line short in the rear side squib LH circuit during primary check.
  • Rear side squib LH malfunction
  • Airbag ECU assembly malfunction
  • Floor wire
  • Rear seat airbag assembly LH (Rear side squib LH)
  • Airbag ECU assembly
B1856/63
  • The airbag ECU assembly detects an open in the rear side squib LH circuit.
  • Rear side squib LH malfunction
  • Airbag ECU assembly malfunction
B1857/63
  • The airbag ECU assembly detects a short to ground in the rear side squib LH circuit.
  • Rear side squib LH malfunction
  • Airbag ECU assembly malfunction
B1858/63
  • The airbag ECU assembly detects a short to B+ in the rear side squib LH circuit.
  • Rear side squib LH malfunction
  • Airbag ECU assembly malfunction
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