NAVIGATION 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 map light assembly (telephone microphone assembly) are connected to each other using the microphone connection detection signal lines (w/ Sliding Roof).

The radio and display receiver assembly and telephone microphone assembly are connected to each other using the microphone connection detection signal lines (w/o Sliding Roof).

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

  • Telephone microphone assembly

  • Radio and display receiver assembly

  • Harness or connector

  • Map light assembly*

WIRING DIAGRAM

B004QFWE12

PROCEDURE


  1. CHECK MODEL


    1. Choose the model to be inspected.

      Result
      Result Proceed to
      w/o Sliding Roof A
      w/ Sliding Roof B

    B

    INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    A

  2. INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY


    1. B004QVTC26
      *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
      F31-19 (MIN-) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY)


    1. Disconnect the F31 radio and display receiver assembly connector.

    2. Disconnect the O2 telephone microphone assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F31-6 (SNS2) - O2-3 (SNS2) Always Below 1 Ω
      F31-19 (MIN-) - O2-4 (MCO-) Always Below 1 Ω
      F31-6 (SNS2) or O2-3 (SNS2) - Body ground Always 10 kΩ or higher
      F31-19 (MIN-) or O2-4 (MCO-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT TELEPHONE MICROPHONE ASSEMBLY


    1. Remove the telephone microphone assembly.

      Tech Tips

      Click here

    2. B004Q4BC18
      *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
      O2-3 (SNS2) - O2-4 (MCO-) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    NG

    REPLACE TELEPHONE MICROPHONE ASSEMBLY Click here

  5. INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY


    1. B004QVTC26
      *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
      F31-19 (MIN-) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    OK

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


    1. Disconnect the F31 radio and display receiver assembly connector.

    2. Disconnect the O4 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
      F31-6 (SNS2) - O4-14 (SNS2) Always Below 1 Ω
      F31-19 (MIN-) - O4-15 (MCO-) Always Below 1 Ω
      F31-6 (SNS2) or O4-14 (SNS2) - Body ground Always 10 kΩ or higher
      F31-19 (MIN-) or O4-15 (MCO-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. INSPECT MAP LIGHT ASSEMBLY


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

      Tech Tips

      Click here

    2. B004QWVC82
      *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
      O4-14 (SNS2) - O4-15 (MCO-) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    NG

  8. REPLACE TELEPHONE MICROPHONE ASSEMBLY


    1. Replace the telephone microphone assembly.

      Tech Tips

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  9. CLEAR DTC


    1. Clear the DTCs.


      Body Electrical > Navigation System > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  10. CHECK FOR DTC


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


      Body Electrical > Navigation System > Trouble Codes
      Result
      Result Proceed to
      DTCs are not output A
      DTCs are output B

    A

    END

    B

    REPLACE MAP LIGHT ASSEMBLY Click here