AUDIO AND VISUAL SYSTEM, Diagnostic DTC:B1579

DTC Code DTC Name
B1579 Voice Recognition Microphone Disconnected

DESCRIPTION

The radio and display receiver assembly and inner rear view mirror assembly (amplifier microphone assembly) are connected to each other using the microphone connection detection signal lines.

This DTC is stored when a microphone connection detection signal line is disconnected.

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

  • Inner rear view mirror assembly (amplifier microphone assembly)

  • Radio and display receiver assembly

  • Harness or connector

WIRING DIAGRAM

A01ELCIE50

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY


    1. A01EKCTE53
      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
      E42-19 (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 - INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY))


    1. Disconnect the E42 radio and display receiver assembly connector.

    2. Disconnect the P12 inner rear view mirror assembly (amplifier microphone assembly) connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      E42-6 (SNS2) - P12-10 (SGND) Always Below 1 Ω
      E42-19 (MIN-) - P12-12 (MIC-) Always Below 1 Ω
      E42-6 (SNS2) - Body ground Always 10 kΩ or higher
      E42-19 (MIN-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY)


    1. Remove the inner rear view mirror assembly (amplifier microphone assembly).

    2. A01ELVHE14
      Text in Illustration
      *a

      Component without harness connected

      (Inner Rear View Mirror Assembly (Amplifier Microphone Assembly))

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      10 (SGND) - 12 (MIC-) Always Below 1 Ω

    NG

    REPLACE INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY) Click here

    OK

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here