NAVIGATION SYSTEM, Diagnostic DTC:B1579

DTC Code DTC Name
B1579 Voice Recognition Microphone Disconnected

DESCRIPTION

The navigation 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 Code DTC Detection Condition Trouble Area
B1579 Microphone signal is lost

  • Roof console box assembly (telephone microphone assembly)

  • DCM (telematics transceiver)*1

  • Navigation receiver assembly

  • Harness or connector

WIRING DIAGRAM

A01HTPDE09

INSPECTION PROCEDURE

Note

If the DCM (telematics transceiver) has been replaced, perform the DCM Activation procedure using the Techstream (w/ Manual (SOS) Switch) Click here.

PROCEDURE


  1. INSPECT NAVIGATION RECEIVER ASSEMBLY


    1. A01HUAYE04
      Text in Illustration
      *a

      Component with harness connected

      (Navigation Receiver Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I74-19 (MIN-) - Body ground Always Below 1 Ω

    NG

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here

    OK

  2. CONFIRM MODEL


    1. Choose the model to be inspected.

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

    B

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

    A

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


    1. Disconnect the I135 DCM (telematics transceiver) connector.

    2. Disconnect the S12 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
      I135-35 (MCI-) - S12-12 (MCO-) Always Below 1 Ω
      I135-35 (MCI-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the I74 navigation receiver assembly connector.

    2. Disconnect the I135 DCM (telematics transceiver) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I74-19 (MIN-) - I135-19 (MCO-) Always Below 1 Ω
      I74-19 (MIN-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the I74 navigation receiver assembly connector.

    2. Disconnect the S12 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
      I74-6 (SNS2) - S12-15 (SNS2) Always Below 1 Ω
      I74-6 (SNS2) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT DCM (TELEMATICS TRANSCEIVER)


    1. A01HSBCE55
      Text in Illustration
      *a

      Component with harness connected

      (DCM (Telematics Transceiver))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I135-35 (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

    B

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

    A

    REPLACE DCM (TELEMATICS TRANSCEIVER) Click here

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


    1. Disconnect the I74 navigation receiver assembly connector.

    2. Disconnect the S12 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
      I74-6 (SNS2) - S12-15 (SNS2) Always Below 1 Ω
      I74-19 (MIN-) - S12-12 (MCO-) Always Below 1 Ω
      I74-6 (SNS2) - Body ground Always 10 kΩ or higher
      I74-19 (MIN-) - 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. A01HTFAE58
      Text in Illustration
      *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
      15 (SNS2) - 12 (MCO-) Always Below 1 Ω

    NG

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

    OK

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here