DTC 1021

DTC B1021 (No.1021): Front Air Bag Module Deployed

DTC Will Set when
The SDM detects a frontal crash of sufficient force to warrant activation of the air bag system. (SDM outputs a deployment

Flow Test Description
Step 1: Check that DTC B1021 has been set although air bag has not been deployed.
Step 2: Check that DTC has been set due to failure of SDM.

NOTE: Before executing items in this flow, be sure to perform Air Bag Diagnostic System Check: Advanced Air Bag.

Step 1-2:

DTC Troubleshooting

NOTE: Upon completion of inspection and repair work, perform the following items.
- Reconnect all air bag system components and ensure all components are properly mounted.
- Repeat Air Bag Diagnostic System Check: Advanced Air Bag to confirm that the trouble has been corrected.