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 telephone 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 Code DTC Detection Condition Trouble Area
B1579 Telephone microphone signal is lost.

  • Telephone microphone assembly

  • Radio and display receiver assembly

  • Harness or connector

WIRING DIAGRAM

A00490AE05
*a Amplifier Microphone Assembly
*b Radio and Display Receiver Assembly

PROCEDURE


  1. CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY


    1. A0048MCE02
      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
      F115-19 (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 F115 radio and display receiver assembly connector.

    2. Disconnect the F95 amplifier microphone assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F115-6 (SNS2) - F95-4 (SNS2) Always Below 1 Ω
      F115-19 (MIN-) - F95-13 (MIC-)
      F115-6 (SNS2) - Body ground Always 10 kΩ or higher
      F115-19 (MIN-) - Body ground

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT AMPLIFIER MICROPHONE ASSEMBLY


    1. A00498EE18
      Text in Illustration
      *a

      Component with harness connected

      (Amplifier Microphone Assembly)

      Remove the amplifier microphone assembly Click here.

    2. 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

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    NG

    REPLACE AMPLIFIER MICROPHONE ASSEMBLY Click here