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

A000QCLE01

CAUTION / NOTICE / HINT

Note

Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed.

Click here

PROCEDURE


  1. CHECK 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 N164 multi-media module receiver assembly connector.

    2. Disconnect the Y11 map light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      N164-49 (SNS2) - Y11-1 (SNS2) Always Below 1 Ω
      N164-29 (MACC) - Y11-4 (MACC) Always Below 1 Ω
      N164-27 (MIN+) - Y11-3 (MCO+) Always Below 1 Ω
      N164-48 (MIN-) - Y11-2 (MCO-) Always Below 1 Ω
      N164-49 (SNS2) - Body ground Always 10 kΩ or higher
      N164-29 (MACC) - Body ground Always 10 kΩ or higher
      N164-27 (MIN+) - Body ground Always 10 kΩ or higher
      N164-48 (MIN-) - Body ground Always 10 kΩ or higher
      N164-28 (SGND) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT MAP LIGHT ASSEMBLY


    1. A000O8HE02

      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-4 (MACC) - B-5 (MACC) Always Below 1 Ω
      A-3 (MCO+) - B-3 (MIC+) Always Below 1 Ω
      A-2 (MCO-) - B-2 (MIC-) Always Below 1 Ω
      A-1 (SNS2) - B-1 (SNS2) Always Below 1 Ω
      A-4 (MACC) - A-3 (MCO+) Always 10 kΩ or higher
      A-4 (MACC) - A-2 (MCO-) Always 10 kΩ or higher
      A-4 (MACC) - A-1 (SNS2) Always 10 kΩ or higher
      A-3 (MCO+) - A-2 (MCO-) Always 10 kΩ or higher
      A-3 (MCO+) - A-1 (SNS2) Always 10 kΩ or higher
      A-2 (MCO-) - A-1 (SNS2) Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE MAP LIGHT ASSEMBLY Click here

    OK

  4. CHECK TELEPHONE MICROPHONE ASSEMBLY


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

      Click here

    2. Clear the DTCs.

      Click here

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

      OK
      No DTCs are output.
      Result
      Proceed to
      OK
      NG

    OK

    END (TELEPHONE MICROPHONE ASSEMBLY IS DEFECTIVE)

    NG

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY Click here

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


    1. Disconnect the N164 multi-media module receiver assembly connector.

    2. Disconnect the Y11 map light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      N164-49 (SNS2) - Y11-1 (SNS2) Always Below 1 Ω
      N164-49 (SNS2) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the N164 multi-media module receiver assembly connector.

    2. Disconnect the N169 DCM (telematics transceiver) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      N164-27 (MIN+) - N169-18 (MCO+) Always Below 1 Ω
      N164-48 (MIN-) - N169-19 (MCO-) Always Below 1 Ω
      N164-27 (MIN+) - Body ground Always 10 kΩ or higher
      N164-48 (MIN-) - Body ground Always 10 kΩ or higher
      N164-28 (SGND) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the N169 DCM (telematics transceiver) connector.

    2. Disconnect the Y11 map light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      N169-33 (MCVD) - Y11-4 (MACC) Always Below 1 Ω
      N169-34 (MCI+) - Y11-3 (MCO+) Always Below 1 Ω
      N169-35 (MCI-) - Y11-2 (MCO-) Always Below 1 Ω
      N169-33 (MCVD) - Body ground Always 10 kΩ or higher
      N169-34 (MCI+) - Body ground Always 10 kΩ or higher
      N169-35 (MCI-) - Body ground Always 10 kΩ or higher
      N169-32 (SGND) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. INSPECT MAP LIGHT ASSEMBLY


    1. A000O8HE02

      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-4 (MACC) - B-5 (MACC) Always Below 1 Ω
      A-3 (MCO+) - B-3 (MIC+) Always Below 1 Ω
      A-2 (MCO-) - B-2 (MIC-) Always Below 1 Ω
      A-1 (SNS2) - B-1 (SNS2) Always Below 1 Ω
      A-4 (MACC) - A-3 (MCO+) Always 10 kΩ or higher
      A-4 (MACC) - A-2 (MCO-) Always 10 kΩ or higher
      A-4 (MACC) - A-1 (SNS2) Always 10 kΩ or higher
      A-3 (MCO+) - A-2 (MCO-) Always 10 kΩ or higher
      A-3 (MCO+) - A-1 (SNS2) Always 10 kΩ or higher
      A-2 (MCO-) - A-1 (SNS2) Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE MAP LIGHT ASSEMBLY Click here

    OK

  9. CHECK DCM (TELEMATICS TRANSCEIVER)


    1. A000QGFC27
      *a

      Component with harness connected

      (Telematics Transceiver)

      Disconnect the Y11 map light assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      N169-33 (MCVD) - Body ground Power switch on (ACC) 4 to 6 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      N169-32 (SGND) - Body ground Always Below 1 Ω
      N169-35 (MCI-) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE TELEMATICS TRANSCEIVER Click here

    OK

  10. CHECK TELEPHONE MICROPHONE ASSEMBLY


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

      Click here

    2. Clear the DTCs.

      Click here

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

      OK
      No DTCs are output.
      Result
      Proceed to
      OK
      NG

    OK

    END (TELEPHONE MICROPHONE ASSEMBLY IS DEFECTIVE)

    NG

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY Click here