B1901 LEXUS, TOYOTA, SCION: OPEN IN FRONT DRIVER SIDE PRETENSIONER SQUIB CIRCUIT
POST UPDATED IN June, 2023
B1901 LEXUS, TOYOTA, SCION: OPEN IN FRONT DRIVER SIDE PRETENSIONER SQUIB CIRCUIT
The driver-side pretensioner circuit is comprised of the left front outboard seat belt (LH) and the center airbag sensor assembly. The function of this circuit is to give instruction to the SRS (Supplemental Restraint System) to work once the deployment conditions are met.
When the B1901 OBD2 fault code is set, it is because there is a malfunction of the driver’s side pretensioner circuit, which is caused by an open circuit.
The OBDII diagnostic code B1901 is stored by the following reasons:
To troubleshoot the DTC B1901 OBD2, try this: