1. Switch the ignition off.
2. Disconnect the negative battery cable and wait for 1 min or more. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].)
3. Remove the front seat. (See FRONT SEAT REMOVAL/INSTALLATION.)
4. Remove the front buckle. (See FRONT BUCKLE REMOVAL/INSTALLATION.)
5. Inspect for continuity between the buckle switch terminals using a tester.
If not as indicated in the table, replace the front buckle.
1. Since the buckle switch cannot be inspected separately, perform air bag DTC inspection.(See DTC B0052:09/B0052:11/B0052:14 [TWO-STEP DEPLOYMENT CONTROL SYSTEM].)