1. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].)
2. Remove the following parts:a. Trunk covering (See TRUNK COVERING REMOVAL/INSTALLATION.)b. Trunk board (See TRUNK BOARD REMOVAL/INSTALLATION.)c. Trunk side pocket (RH) (See TRUNK SIDE POCKET REMOVAL/INSTALLATION.)
3. Pull back the trunk side trim (RH) to a position which allows for the removal of the theft-deterrent horn. (See TRUNK SIDE TRIM REMOVAL/INSTALLATION.)
4. Remove the theft-deterrent horn. (See THEFT-DETERRENT HORN REMOVAL/INSTALLATION.)
5. Apply battery positive voltage to horn terminal A, and connect the horn retaining bolt to ground as shown in the figure, and then verify that the horn sounds.
If the horn does not sound, replace the horn.