DTC B1421: Side-Airbag Module (RH) (Squib) System Fault 2 (Open in the Squib Circuit)

CIRCUIT OPERATION
The SRS-ECU judges how severe a collision is by detecting signals from the left and right side impact sensors. If the impact is over a predetermined level, the SRS-ECU outputs an ignition signal. At this time, if the side-airbag safing G-sensor is on, the SRS side-airbag will inflate.
The ignition signal is input to the side-airbag module to inflate the side-airbag.
DTC SET CONDITIONS
This DTC is set if there is abnormal resistance between the input terminals of the side-airbag module (RH) (squib).
TROUBLESHOOTING HINTS
Open circuit in the side-airbag module (RH) (squib) circuit
Improper connector contact
Malfunction of the SRS-ECU