DTC B1921-77: Open in Rear Pretensioner Squib RH Circuit [06/2015 - ]: Description

The rear pretensioner squib RH circuit consists of the airbag sensor assembly and rear seat 3 point type outer belt assembly RH.

The airbag sensor assembly uses this circuit to deploy the pretensioner when deployment conditions are met.

DTC B1921/77 is stored when an open is detected in the rear pretensioner squib RH circuit.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Test Mode / Check Mode
B1921/77	Open in Rear Pretensioner Squib RH Circuit	The airbag sensor assembly detects an open in the rear pretensioner squib RH circuit. Rear pretensioner squib RH malfunction Airbag sensor assembly malfunction	No. 2 floor wire Rear pretensioner squib RH (Rear seat 3 point type outer belt assembly RH) Airbag sensor assembly	Applies to check mode