If the battery voltage can be verified, replace the antenna amplifier.
1. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].)
2. Remove the following parts:a. Sunroof seaming welt (with sunroof system) (See SUNROOF UNIT REMOVAL/INSTALLATION.)b. A-pillar trim (See A-PILLAR TRIM REMOVAL/INSTALLATION.)c. Sunvisor (See SUNVISOR REMOVAL/INSTALLATION.)d. Front map light (See MAP LIGHT REMOVAL/INSTALLATION.)e. Assist handle (See ASSIST HANDLE REMOVAL/INSTALLATION.)f. Front scuff plate (See FRONT SCUFF PLATE REMOVAL/INSTALLATION.)g. Rear scuff plate (See REAR SCUFF PLATE REMOVAL/INSTALLATION.)h. B-pillar lower trim (See B-PILLAR LOWER TRIM REMOVAL/INSTALLATION.)i. Adjust anchor cover (See FRONT SEAT BELT REMOVAL/INSTALLATION.)j. Upper anchor installation bolt on the seat belt (See FRONT SEAT BELT REMOVAL/INSTALLATION.)k. B-pillar upper trim (See B-PILLAR UPPER TRIM REMOVAL/INSTALLATION.)l. Rear seat cushion (See REAR SEAT CUSHION REMOVAL/INSTALLATION.)m. Rear side seat back (See REAR SIDE SEAT BACK REMOVAL/INSTALLATION.)n. Tire house trim (See TIRE HOUSE TRIM REMOVAL/INSTALLATION.)o. C-pillar trim (See C-PILLAR TRIM REMOVAL/INSTALLATION.)p. Upper panel (See UPPER PANEL REMOVAL/INSTALLATION.)q. Shift lever knob (MTX) (See MANUAL TRANSAXLE SHIFT MECHANISM REMOVAL/INSTALLATION [C66M-R].)r. Selector lever knob (ATX) (See AUTOMATIC TRANSAXLE SHIFT MECHANISM REMOVAL/INSTALLATION.)s. Shift panel (See SHIFT PANEL REMOVAL/INSTALLATION.)t. Rear console (See REAR CONSOLE REMOVAL/INSTALLATION.)u. Front console box (See FRONT CONSOLE BOX REMOVAL/INSTALLATION.)v. Side wall (See SIDE WALL REMOVAL/INSTALLATION.)w. Front console (See FRONT CONSOLE REMOVAL/INSTALLATION.)x. Headliner (See HEADLINER REMOVAL/INSTALLATION.)
3. Switch the ignition ON (engine off or on).
4. Turn the audio unit power to ON.
5. Verify that voltage is B+ at the antenna amplifier terminal B.
If the battery voltage can be verified, replace the antenna amplifier.