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NAVIGATION SYSTEM, Diagnostic DTC:B1579

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DTC Code DTC Name
B1579 Voice Recognition Microphone Disconnected
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DESCRIPTION

The radio receiver assembly and map light assembly (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. Detection Item DTC Detection Condition Trouble Area
B1579 Voice Recognition Microphone Disconnected Microphone signal is lost.

  • Map light assembly

  • Telephone microphone assembly

  • Radio receiver assembly

  • Harness or connector
Table 1. *a Map Light Assembly (Telephone Microphone Assembly) *b Radio Receiver Assembly
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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

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.

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PROCEDURE


  1. Click here

    INSPECT RADIO RECEIVER ASSEMBLY


    1. A0022IEC01
      *a

      Component with harness connected

      (Radio Receiver Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K58-48 (MIN-) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

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    CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY))


    1. Disconnect the K58 radio receiver assembly connector.

    2. Disconnect the S4 map light assembly (telephone microphone assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K58-49 (SNS2) - S4-1 (SNS2) Always Below 1 Ω
      K58-48 (MIN-) - S4-2 (MCO-) Always Below 1 Ω
      K58-49 (SNS2) - Body ground Always 10 kΩ or higher
      K58-48 (MIN-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

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    INSPECT MAP LIGHT ASSEMBLY


    1. Remove the map light assembly (telephone microphone assembly).

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    2. A0023AYC20
      *a

      Component without harness connected

      (Map Light Assembly (Telephone Microphone Assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (SNS2) - 2 (MCO-) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

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    REPLACE TELEPHONE MICROPHONE ASSEMBLY


    1. Replace the telephone microphone assembly.

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    2. Clear the DTCs.

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      1. Body Electrical > Navigation System > Clear DTCs


    3. Recheck for DTCs and check that no DTCs are output.


      1. Body Electrical > Navigation System > Trouble Codes


      OK
      No DTCs are output.
      Result
      Proceed to
      OK
      NG