AUDIO AND VISUAL SYSTEM, Diagnostic DTC:B1579

DTC Code DTC Name
B1579 Voice Recognition Microphone Disconnected

DESCRIPTION

The radio receiver assembly and roof console box 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. DTC Detection Condition Trouble Area
B1579 Telephone microphone signal is lost.

  • Roof console box assembly

  • Telephone microphone assembly

  • Telematics transceiver*

  • Radio receiver assembly

  • Harness or connector

WIRING DIAGRAM


  1. w/o Manual (SOS) Switch

    B001OMHE02
    *a Roof Console Box Assembly
    *b (Telephone Microphone Assembly)
    *c Radio Receiver Assembly

  2. w/ Manual (SOS) Switch

    B001O57E05
    *a Roof Console Box Assembly
    *b Telematics Transceiver
    *c (Telephone Microphone Assembly)
    *d Radio Receiver Assembly

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. INSPECT RADIO RECEIVER ASSEMBLY


    1. B001NRZC02
      *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
      H179-19 (MIN-) - Body ground Always Below 1 Ω

    NG

    REPLACE RADIO RECEIVER ASSEMBLY Click here

    OK

  2. CONFIRM MODEL


    1. Choose the model to be inspected.

      Result
      Result Proceed to
      w/ Manual (SOS) Switch A
      w/o Manual (SOS) Switch B

    B

    CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - ROOF CONSOLE BOX ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)) Click here

    A

  3. CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - ROOF CONSOLE BOX ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY))


    1. Disconnect the H101 telematics transceiver connector.

    2. Disconnect the T11 roof console box 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
      H101-35 (MCI-) - T11-2 (MCO-) Always Below 1 Ω
      H101-35 (MCI-) or T11-2 (MCO-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - TELEMATICS TRANSCEIVER)


    1. Disconnect the H179 radio receiver assembly connector.

    2. Disconnect the H101 telematics transceiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H179-19 (MIN-) - H101-19 (MCO-) Always Below 1 Ω
      H179-19 (MIN-) or H101-19 (MCO-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - ROOF CONSOLE BOX ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY))


    1. Disconnect the H179 radio receiver assembly connector.

    2. Disconnect the T11 roof console box 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
      H179-6 (SNS2) - T11-1 (SNS2) Always Below 1 Ω
      H179-6 (SNS2) or T11-1 (SNS2) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT TELEMATICS TRANSCEIVER


    1. B001O8VC01
      *a

      Component with harness connected

      (Telematics Transceiver)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H101-35 (MCI-) - Body ground Always Below 1 Ω

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

      Result
      Result Proceed to
      NG A
      OK B

    A

    REPLACE TELEMATICS TRANSCEIVER Click here

    B

    INSPECT ROOF CONSOLE BOX ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) Click here

  7. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - ROOF CONSOLE BOX ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY))


    1. Disconnect the H179 radio receiver assembly connector.

    2. Disconnect the T11 roof console box 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
      H179-19 (MIN-) - T11-2 (MCO-) Always Below 1 Ω
      H179-6 (SNS2) - T11-1 (SNS2) Always Below 1 Ω
      H179-19 (MIN-) or T11-2 (MCO-) - Body ground Always 10 kΩ or higher
      H179-6 (SNS2) or T11-1 (SNS2) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. INSPECT ROOF CONSOLE BOX ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)


    1. Remove the roof console box assembly (telephone microphone assembly) Click here.

    2. B001OAYC75
      *a

      Component without harness connected

      (Roof Console Box Assembly (Telephone Microphone Assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2 (MCO-) - 1 (SNS2) Always Below 1 Ω

    OK

    REPLACE RADIO RECEIVER ASSEMBLY Click here

    NG

  9. REPLACE 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.

    OK

    END

    NG

    REPLACE ROOF CONSOLE BOX ASSEMBLY Click here