NAVIGATION SYSTEM, 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.

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

  • Map light assembly

  • Telephone microphone assembly

  • Radio and display receiver assembly

  • Harness or connector

  • Telematics transceiver*

WIRING DIAGRAM

Figure 1. w/o Manual (SOS) Switch

A01TB48E64
*a Map Light Assembly (Telephone Microphone Assembly)
*b Radio and Display Receiver Assembly

Figure 2. w/ Manual (SOS) Switch

A01T9LYE05
*a Map Light Assembly (Telephone Microphone Assembly)
*b Telematics Transceiver
*c Radio and Display Receiver Assembly

PROCEDURE


  1. INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY


    1. A01TBEUC40
      *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
      E60-19 (MIN-) - Body ground Always Below 1 Ω
      Result
      Result Proceed to

      OK

      (w/o Manual (SOS) Switch)

      		 A

      OK

      (w/ Manual (SOS) Switch)

      		 B
      NG C

    B

    CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)) Click here

    C

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY for Sedan: Click here
    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY for Hatchback, Wagon: Click here

    A

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


    1. Disconnect the E60 radio and display receiver assembly connector.

    2. Disconnect the O8 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
      E60-6 (SNS2) - O8-5 (SNS2) Always Below 1 Ω
      E60-19 (MIN-) - O8-14 (MIC-) Always Below 1 Ω
      E60-6 (SNS2) or O8-5 (SNS2) - Body ground Always 10 kΩ or higher
      E60-19 (MIN-) or O8-14 (MIC-) - 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. Remove the map light assembly (telephone microphone assembly).

      Click here

    2. A01T9ZZC01
      *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
      5 (SNS2) - 14 (MIC-) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY for Sedan: Click here
    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY for Hatchback, Wagon: Click here

    NG

  4. 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


      Body Electrical > Navigation System > Clear DTCs

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


      Body Electrical > Navigation System > Trouble Codes
      OK
      No DTCs are output.
      Result
      Proceed to
      OK
      NG

    OK

    END

    NG

    REPLACE MAP LIGHT ASSEMBLY Click here

  5. CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY))


    1. Disconnect the E143 telematics transceiver connector.

    2. Disconnect the O8 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
      E143-35 (MCI-) - O8-14 (MIC-) Always Below 1 Ω
      E143-35 (MCI-) or O8-14 (MIC-) - 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 (RADIO AND DISPLAY RECEIVER ASSEMBLY - TELEMATICS TRANSCEIVER)


    1. Disconnect the E60 radio and display receiver assembly connector.

    2. Disconnect the E143 telematics transceiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E60-19 (MIN-) - E143-19 (MCO-) Always Below 1 Ω
      E60-19 (MIN-) or E143-19 (MCO-) - 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 (RADIO AND DISPLAY RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY))


    1. Disconnect the E60 radio and display receiver assembly connector.

    2. Disconnect the O8 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
      E60-6 (SNS2) - O8-5 (SNS2) Always Below 1 Ω
      E60-6 (SNS2) or O8-5 (SNS2) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. INSPECT TELEMATICS TRANSCEIVER


    1. A01TDPRC18
      *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
      E143-35 (MCI-) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE TELEMATICS TRANSCEIVER Click here

    OK

  9. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)


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

      Click here

    2. A01T9ZZC01
      *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
      5 (SNS2) - 14 (MIC-) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    NG

  10. 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


      Body Electrical > Navigation System > Clear DTCs

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


      Body Electrical > Navigation System > Trouble Codes
      OK
      No DTCs are output.
      Result
      Proceed to
      OK
      NG

    OK

    END

    NG

    REPLACE MAP LIGHT ASSEMBLY Click here