AUDIO AND VISUAL SYSTEM, Diagnostic DTC:B1579

DTC Code DTC Name
B1579 Voice Recognition Microphone Disconnected

DESCRIPTION

The multi-media module 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 Code DTC Detection Condition Trouble Area
B1579 Telephone microphone signal is lost.

  • Multi-media module receiver assembly

  • Map light assembly

  • Telephone microphone assembly

  • DCM (telematics transceiver)*

  • Harness or connector

WIRING DIAGRAM

A01WWJEE03

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 Audio and Visual System.

Click here

PROCEDURE


  1. CONFIRM MODEL


    1. Choose the model to be inspected.

      Result
      Result Proceed to
      w/o Telematics Transceiver A
      w/ Telematics Transceiver B

    B

    CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY) Click here

    A

  2. CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY)


    1. Disconnect the F76 multi-media module receiver assembly connector.

    2. Disconnect the R7 map light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F76-49 (SNS2) - R7-31 (SNS2) Always Below 1 Ω
      F76-29 (MACC) - R7-22 (ACC) Always Below 1 Ω
      F76-27 (MIN+) - R7-21 (MI1+) Always Below 1 Ω
      F76-48 (MIN-) - R7-20 (MIC-) Always Below 1 Ω
      F76-49 (SNS2) or R7-31 (SNS2) - Body ground Always 10 kΩ or higher
      F76-29 (MACC) or R7-22 (ACC) - Body ground Always 10 kΩ or higher
      F76-27 (MIN+) or R7-21 (MI1+) - Body ground Always 10 kΩ or higher
      F76-48 (MIN-) or R7-20 (MIC-) - Body ground Always 10 kΩ or higher
      F76-28 (SGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT MAP LIGHT ASSEMBLY


    1. B00188AN01

      Remove the map light assembly.

      Click here

    2. Remove the telephone microphone assembly.

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A-31 (SNS2) - B-3 (SNS2) Always Below 1 Ω
      A-22 (ACC) - B-6 (MACC) Always Below 1 Ω
      A-21 (MI1+) - B-5 (MIC+) Always Below 1 Ω
      A-20 (MIC-) - B-4 (MIC-) Always Below 1 Ω
      A-20 (MIC-) - A-21 (MI1+) Always 10 kΩ or higher
      A-20 (MIC-) - A-22 (ACC) Always 10 kΩ or higher
      A-20 (MIC-) - A-31 (SNS2) Always 10 kΩ or higher
      A-21 (MI1+) - A-22 (ACC) Always 10 kΩ or higher
      A-21 (MI1+) - A-31 (SNS2) Always 10 kΩ or higher
      A-22 (ACC) - A-31 (SNS2) Always 10 kΩ or higher

    NG

    REPLACE MAP LIGHT ASSEMBLY Click here

    OK

  4. REPLACE TELEPHONE MICROPHONE ASSEMBLY


    1. Replace the telephone microphone assembly with a new or known good one Click here.


    NEXT

  5. CLEAR DTC


    1. Clear the DTC Click here.


    NEXT

  6. CHECK FOR DTC


    1. Recheck for DTCs and check if the same DTC is output again Click here.

      OK
      No DTCs are output.

    OK

    END (TELEPHONE MICROPHONE ASSEMBLY IS DEFECTIVE)

    NG

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY Click here

  7. CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY)


    1. Disconnect the F76 multi-media module receiver assembly connector.

    2. Disconnect the R7 map light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F76-49 (SNS2) - R7-31 (SNS2) Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - DCM [TELEMATICS TRANSCEIVER])


    1. Disconnect the F76 multi-media module receiver assembly connector.

    2. Disconnect the P2 DCM (telematics transceiver) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F76-27 (MIN+) - P2-18 (MCO+) Always Below 1 Ω
      F76-48 (MIN-) - P2-19 (MCO-) Always Below 1 Ω
      F76-27 (MIN+) or P2-18 (MCO+) - Body ground Always 10 kΩ or higher
      F76-48 (MIN-) or P2-19 (MCO-) - Body ground Always 10 kΩ or higher
      F76-28 (SGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. CHECK HARNESS AND CONNECTOR (DCM [TELEMATICS TRANSCEIVER] - MAP LIGHT ASSEMBLY)


    1. Disconnect the P2 DCM (telematics transceiver) connector.

    2. Disconnect the R7 map light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P2-33 (MCVD) - R7-22 (ACC) Always Below 1 Ω
      P2-34 (MCI+) - R7-21 (MI1+) Always Below 1 Ω
      P2-35 (MCI-) - R7-20 (MIC-) Always Below 1 Ω
      P2-33 (MCVD) or R7-22 (ACC) - Body ground Always 10 kΩ or higher
      P2-34 (MCI+) or R7-21 (MI1+) - Body ground Always 10 kΩ or higher
      P2-35 (MCI-) or R7-20 (MIC-) - Body ground Always 10 kΩ or higher
      P2-32 (SGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK DCM (TELEMATICS TRANSCEIVER)


    1. A01WQTOE02
      Text in Illustration
      *a

      Component with harness connected

      (DCM [Telematics Transceiver])

      Reconnect the DCM (telematics transceiver) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P2-32 (SGND) - Body ground Always Below 1 Ω
      P2-35 (MCI-) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      P2-33 (MCVD) - Body ground Engine switch on (ACC) 4 to 6 V

    NG

    REPLACE DCM (TELEMATICS TRANSCEIVER) Click here

    OK

  11. INSPECT MAP LIGHT ASSEMBLY


    1. B00188AN01

      Remove the map light assembly.

      Click here

    2. Remove the telephone microphone assembly.

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A-31 (SNS2) - B-3 (SNS2) Always Below 1 Ω
      A-22 (ACC) - B-6 (MACC) Always Below 1 Ω
      A-21 (MI1+) - B-5 (MIC+) Always Below 1 Ω
      A-20 (MIC-) - B-4 (MIC-) Always Below 1 Ω
      A-20 (MIC-) - A-21 (MI1+) Always 10 kΩ or higher
      A-20 (MIC-) - A-22 (ACC) Always 10 kΩ or higher
      A-20 (MIC-) - A-31 (SNS2) Always 10 kΩ or higher
      A-21 (MI1+) - A-22 (ACC) Always 10 kΩ or higher
      A-21 (MI1+) - A-31 (SNS2) Always 10 kΩ or higher
      A-22 (ACC) - A-31 (SNS2) Always 10 kΩ or higher

    NG

    REPLACE MAP LIGHT ASSEMBLY Click here

    OK

  12. REPLACE TELEPHONE MICROPHONE ASSEMBLY


    1. Replace the telephone microphone assembly with a new or known good one Click here.


    NEXT

  13. CLEAR DTC


    1. Clear the DTC Click here.


    NEXT

  14. CHECK FOR DTC


    1. Recheck for DTCs and check if the same DTC is output again Click here.

      OK
      No DTCs are output.

    OK

    END (TELEPHONE MICROPHONE ASSEMBLY IS DEFECTIVE)

    NG

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY Click here