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Diagnosis Procedure
1.CHECK ANTENNA CONNECTOR
  1. Turn electric motor switch OFF.
  2. Visually inspect radio antenna, antenna feeder and antenna connector.
Is the inspection result normal?
.
Repair or replace malfunctioning parts.
 
2.CHECK ANTENNA CIRCUIT CONTINUITY
  1. Disconnect AV control unit harness connector and antenna base harness connector.
  2. Check continuity between AV control unit harness connector and antenna base harness connector.
    Without BOSE
    AV control unitAntenna baseContinuity
    ConnectorTerminal
    M18383Existed
    With BOSE
    AV control unitAntenna baseContinuity
    ConnectorTerminal
    M14283Existed
Is the inspection result normal?
Replace roof antenna. Refer to REMOVAL AND INSTALLATION.
Repair or replace antenna feeder.