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Diagnosis Procedure
1.CHECK TEL VOICE SIGNAL CIRCUIT
  1. Turn ignition switch OFF.
  2. Disconnect AV control unit and TCU harness connector.
  3. Check the continuity between AV control unit harness connector and TCU harness connector.
    AV control unitTCUContinuity
    ConnectorTerminalConnectorTerminal
    M102*1
    M124*2
    32M3531Existed
    5232
    *1: Without BOSE
    *2: With BOSE
Is the inspection result normal?
Replace AV control unit. Refer to Removal and Installation.
Repair or replace harness or connector.