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Antenna amplifier inspection

  1. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
  2. Remove the following parts:
    1. Rear scuff plate (See REAR SCUFF PLATE REMOVAL/INSTALLATION .)
    2. Rear seat cushion (See REAR SEAT CUSHION REMOVAL/INSTALLATION .)
    3. Rear seat back (See REAR SEAT BACK REMOVAL/INSTALLATION .)
    4. Rear package tray (See REAR PACKAGE TRAY REMOVAL/INSTALLATION .)
    5. Trunk board (See TRUNK BOARD REMOVAL/INSTALLATION .)
    6. Trunk covering (See TRUNK COVERING REMOVAL/INSTALLATION .)
    7. Bass-box (with Bose®) (See BASS-BOX REMOVAL/INSTALLATION .)
    8. Trunk box (See TRUNK BOX REMOVAL/INSTALLATION .)
    9. Trunk end trim (See TRUNK END TRIM REMOVAL/INSTALLATION .)
    10. Trunk side trim (See TRUNK SIDE TRIM REMOVAL/INSTALLATION .)
    11. C-pillar trim (See C-PILLAR TRIM REMOVAL/INSTALLATION .)
    12. Rear assist handle (See ASSIST HANDLE REMOVAL/INSTALLATION .)
  3. Peel back the trunk side trim and remove the C-pillar trim. (See C-PILLAR TRIM REMOVAL/INSTALLATION .)
    NOTE:
    • To facilitate the procedure, leave the C-pillar trim in the cabin without pulling the rear seat belt.
  4. Remove the fasteners.
    Fig 1: Removing Center Roof Antenna Fasteners
    G11434003Courtesy of MAZDA MOTORS CORP.
  5. Peel back the seaming welt of the rear door and the liftgate.
    CAUTION:
    • If the headliner is peeled back excessively, the headliner could become creased. Be careful not to peel back the headliner excessively.
  6. Partially peel back the headliner.
  7. Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
  8. Switch the ignition ON (engine off or on).
  9. Turn the audio unit power on. (without center display)
  10. Change the mode to radio mode. (without center display)
  11. Measure the voltage at center roof antenna connector terminal B.
    Fig 2: Locating Center Roof Antenna Connector
    G11434004Courtesy of MAZDA MOTORS CORP.

    If the voltage is the battery voltage:

    • The center roof antenna is normal. Go to the feeder line inspection.

    If the voltage is other than the battery voltage:

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