NAVIGATION SYSTEM (for Navigation Receiver Type), Diagnostic DTC:B1579

DTC Code DTC Name
B1579 Voice Recognition Microphone Disconnected

DESCRIPTION

The navigation 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)

  • Navigation receiver assembly

  • Harness or connector

WIRING DIAGRAM

A01ELCIE71

INSPECTION PROCEDURE

Note

Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Navigation System Click here.

PROCEDURE


  1. INSPECT NAVIGATION RECEIVER ASSEMBLY


    1. A01EKCTE55
      Text in Illustration
      *a

      Component with harness connected

      (Navigation Receiver Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E40-19 (MIN-) - Body ground Always Below 1 Ω

    NG

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY))


    1. Disconnect the E40 navigation 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 Condition Specified Condition
      E40-6 (SNS2) - P12-10 (SGND) Always Below 1 Ω
      E40-19 (MIN-) - P12-12 (MIC-) Always Below 1 Ω
      E40-6 (SNS2) - Body ground Always 10 kΩ or higher
      E40-19 (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. A01ELVHE10
      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 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 NAVIGATION RECEIVER ASSEMBLY Click here