DTC B0021-1A: Left Curtain Deployment Control 1 Circuit Resistance Below Threshold [11/2021 - 10/2023]: Description

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Warning Indicate	Test Mode / Check Mode
B0021-1A	Left Curtain Deployment Control 1 Circuit Resistance Below Threshold	One of the following conditions is met: The airbag ECU assembly detects a line short circuit signal in the left side curtain shield airbag squib circuit for 2 seconds during the primary check A curtain shield airbag assembly LH malfunction An airbag ECU assembly malfunction	Wire harness Curtain shield airbag assembly LH Airbag ECU assembly	Comes on	Applicable