B1821 SCION, LEXUS, TOYOTA: OPEN IN DRIVER SIDE - SIDE SQUIB CIRCUIT
POST UPDATED IN January, 2023
B1821 SCION, LEXUS, TOYOTA: OPEN IN DRIVER SIDE - SIDE SQUIB CIRCUIT
The driver’s side Squib circuit is composed of the center airbag sensor assembly and the left front seat (LH) side airbag assembly. It sends the corresponding signals to the SRS (Supplemental Restraint System) to be deployed once the conditions are met.
When the B1821 OBDII diagnostic code B1821 is stored, it means that the Driver Side Squib circuit has had a malfunction due to an open circuit.
Reasons for setting the DTC B1821 OBD2 code:
To troubleshoot the B1821 OBDII fault code, try this: