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Home >> Toyota >> 2012 >> Prius Plug-in >> Repair and Diagnosis (Single Page) >> Restraints >> Restraints Control Systems >> Supplemental Restraint System (Plug-In) (Diagnostic Codes & Symptom Tests) >> Airbag System >> DTC B1820/55: Short in Side Squib RH Circuit; DTC B1821/55: Open in Side Squib RH Circuit; DTC B1822/55: Short to GND in Side Squib RH Circuit; DTC B1823/55: Short to B+ in Side Squib RH Circuit >> Description
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DTC B1820/55: Short in Side Squib RH Circuit; DTC B1821/55: Open in Side Squib RH Circuit; DTC B1822/55: Short to GND in Side Squib RH Circuit; DTC B1823/55: Short to B+ in Side Squib RH Circuit: Description

The side squib RH circuit consists of the airbag ECU assembly and front seat airbag assembly RH.

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 side squib RH circuit.

DTC No. DTC Detection Condition Trouble Area
B1820/55
  • The airbag ECU assembly receives a line short circuit signal in the side squib RH circuit during primary check.
  • Side squib RH malfunction
  • Airbag ECU assembly malfunction
  • No. 2 floor wire
  • Front seat airbag assembly RH (Side squib RH)
  • Airbag ECU assembly
B1821/55
  • The airbag ECU assembly receives an open circuit signal in the side squib RH circuit.
  • Side squib RH malfunction
  • Airbag ECU assembly malfunction
B1822/55
  • The airbag ECU assembly receives a short circuit to ground signal in the side squib RH circuit.
  • Side squib RH malfunction
  • Airbag ECU assembly malfunction
B1823/55
  • The airbag ECU assembly receives a short circuit to B+ signal in the side squib RH circuit.
  • Side squib RH malfunction
  • Airbag ECU assembly malfunction