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Diagnosis Procedure
1.PERFORM CONFIRMATION PROCEDURE AGAIN
With M.U.T.-III SE
  1. Turn ignition switch ON.
  2. Erase DTC.
  3. Perform confirmation procedure again. Refer to DTC Description.
Is DTC "B1328‐12" detected again?
Check the intermittent incident. Refer to Intermittent IncidentIntermittent Incident.
 
2.CHECK MICROPHONE SIGNAL CIRCUITS FOR SHORT TO POWER SUPPLY
  1. Turn ignition switch OFF.
  2. Disconnect AV control unit harness connector and microphone harness connector.
  3. Turn ignition switch ON.
  4. Check the voltage between AV control unit harness connector and ground.
    (+)(-)Voltage
    AV control unit
    ConnectorTerminal
    M10240Ground0 V
Is the inspection result normal?
Replace AV control unit. Refer to Removal and Installation.
Repair or replace harness or connectors.