NAVIGATION SYSTEM, Diagnostic DTC:B1579

DTC Code DTC Name
B1579 Voice Recognition Microphone Disconnected

DESCRIPTION

The navigation ECU sub-assembly and telephone 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.

  • Telephone microphone assembly

  • Navigation ECU sub-assembly

  • Harness or connector

WIRING DIAGRAM


  1. w/ Front Center Speaker

    A01CFO7E08

  2. w/o Front Center Speaker

    A01CFO7E59

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. CONFIRM MODEL


    1. Choose the model to be inspected.

      Result
      Result Proceed to
      w/ Front Center Speaker A
      w/o Front Center Speaker B

    B

    INSPECT NAVIGATION ECU SUB-ASSEMBLY Click here

    A

  2. INSPECT NAVIGATION ECU SUB-ASSEMBLY


    1. A01CFQFE01
      Text in Illustration
      *a

      Component with harness connected

      (Navigation ECU Sub-assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F23-48 (MIN-) - Body ground Always Below 1 Ω

    NG

    REPLACE NAVIGATION ECU SUB-ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (NAVIGATION ECU SUB-ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY)


    1. Disconnect the F23 navigation ECU sub-assembly connector.

    2. Disconnect the R22 telephone microphone assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F23-49 (SNS2) - R22-3 (SNSE) Always Below 1 Ω
      F23-48 (MIN-) - R22-4 (MIC-) Always Below 1 Ω
      F23-49 (SNS2) - Body ground Always 10 kΩ or higher
      F23-48 (MIN-) - Body ground Always 10 kΩ or higher

    4. Proceed to the next step based on the inspection result.

      Result
      Result Proceed to
      NG A
      OK B

    B

    INSPECT TELEPHONE MICROPHONE ASSEMBLY Click here

    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. INSPECT NAVIGATION ECU SUB-ASSEMBLY


    1. A01CD1ZE73
      Text in Illustration
      *a

      Component with harness connected

      (Navigation ECU Sub-assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F36-19 (MIN-) - Body ground Always Below 1 Ω

    NG

    REPLACE NAVIGATION ECU SUB-ASSEMBLY Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (NAVIGATION ECU SUB-ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY)


    1. Disconnect the F36 navigation ECU sub-assembly connector.

    2. Disconnect the R22 telephone microphone assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F36-6 (SNS2) - R22-3 (SNSE) Always Below 1 Ω
      F36-19 (MIN-) - R22-4 (MIC-) Always Below 1 Ω
      F36-6 (SNS2) - Body ground Always 10 kΩ or higher
      F36-19 (MIN-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT TELEPHONE MICROPHONE ASSEMBLY


    1. Disconnect the R22 telephone microphone assembly connector.

    2. A01CCM6E01
      Text in Illustration
      *a

      Component without harness connected

      (Telephone Microphone Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R22-3 (SNSE) - R22-4 (MIC-) Always Below 1 Ω

    NG

    REPLACE TELEPHONE MICROPHONE ASSEMBLY Click here

    OK

    REPLACE NAVIGATION ECU SUB-ASSEMBLY Click here