1) Turn the ignition switch to OFF, disconnect the battery ground cable, and wait for 20 seconds or more.
2) Confirm that the airbag control module and the connectors (AB6, AB17, AB18) are securely connected.
Is there faulty connector contact (AB6, AB17, AB18)?
If the faulty connector contact remains, replace the airbag main harness along with body harness or replace the airbag control module.