1.GPS antenna check Visually check GPS antenna and antenna feeder. Is the inspection result normal? YES>>GO TO 2. NO>>Repair malfunctioning parts.
2.CHECK AV CONTROL UNIT VOLTAGE

1. Disconnect GPS antenna connector.
2. Turn ignition switch ON.
3. Check voltage between AV control unit and ground.

   (+) | (−) | Voltage (Approx.)
   AV control unit
   Terminal
   137 | Ground | 5.0 V

Is the inspection result normal?
YES>>INSPECTION END
NO>>Replace AV control unit.