AUDIO AND VISUAL SYSTEM(for Radio and Display Type), Diagnostic DTC:B1579

DTC Code DTC Name
B1579 Voice Recognition Microphone Disconnected

DESCRIPTION

The radio and display receiver assembly and amplifier microphone assembly are connected to each other using the microphone connection detection signal lines.

This DTC is stored when the microphone connection detection signal is disconnected.

DTC No. DTC Detection Condition Trouble Area
B1579 Telephone microphone signal is lost.

  • Amplifier microphone assembly

  • Radio and display receiver assembly

  • Harness or connector

WIRING DIAGRAM

A004ED6E20
*a Amplifier Microphone Assembly
*b Radio and Display Receiver Assembly

PROCEDURE


  1. INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY


    1. A004FWIE02
      Text in Illustration
      *a

      Component with harness connected

      (Radio and Display Receiver Assembly)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      F69-19 (MIN-) - Body ground Always Below 1 Ω

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - AMPLIFIER MICROPHONE ASSEMBLY)


    1. Disconnect the F69 radio and display receiver assembly connector.

    2. Disconnect the F34 amplifier microphone assembly connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      F69-6 (SNS2) - F34-4 (SNS2) Always Below 1 Ω
      F69-19 (MIN-) - F34-3 (MCO-) Always Below 1 Ω
      F69-6 (SNS2) - Body ground Always 10 kΩ or higher
      F69-19 (MIN-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT AMPLIFIER MICROPHONE ASSEMBLY


    1. A004FAHE10
      Text in Illustration
      *a

      Component without harness connected

      (Amplifier Microphone Assembly)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      4 (SNS2) - 3 (MCO-) Always Below 1 Ω

    OK

    END

    NG

    REPLACE AMPLIFIER MICROPHONE ASSEMBLY Click here