NAVIGATION SYSTEM (for Navigation Receiver Type), Diagnostic DTC:B1579

DTC Code DTC Name
B1579 Voice Recognition Microphone Disconnected

DESCRIPTION

The navigation ECU sub-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.

  • Map light assembly (telephone microphone assembly)

  • Navigation ECU sub-assembly

  • Harness or connector

WIRING DIAGRAM

A01JC5IE02

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT NAVIGATION ECU SUB-ASSEMBLY


    1. A01JD1PE05
      Text in Illustration
      *a

      Component with harness connected

      (Navigation ECU Sub-assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L130-19 (MIN-) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK HARNESS AND CONNECTOR (NAVIGATION ECU SUB-ASSEMBLY - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY))


    1. Disconnect the navigation ECU sub-assembly connector.

    2. Disconnect the map light assembly (telephone microphone assembly) connector.

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

      Standard Resistance
      w/o Sliding Roof
      Tester Connection Condition Specified Condition
      L130-6 (SNS2) - U3-2 (SNS2) Always Below 1 Ω
      L130-19 (MIN-) - U3-3 (MCO-) Always Below 1 Ω
      L130-6 (SNS2) - Body ground Always 10 kΩ or higher
      L130-19 (MIN-) - Body ground Always 10 kΩ or higher
      w/ Sliding Roof
      Tester Connection Condition Specified Condition
      L130-6 (SNS2) - U13-3 (SNS2) Always Below 1 Ω
      L130-19 (MIN-) - U13-4 (MCO-) Always Below 1 Ω
      L130-6 (SNS2) - Body ground Always 10 kΩ or higher
      L130-19 (MIN-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)


    1. A01JBSTE01
      Text in Illustration
      *A w/o Sliding Roof
      *B w/ Sliding Roof
      *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
      w/o Sliding Roof
      Tester Connection Condition Specified Condition
      U3-2 (SNS2) - U3-3 (MCO-) Always Below 1 Ω
      w/ Sliding Roof
      Tester Connection Condition Specified Condition
      U13-3 (SNS2) - U13-4 (MCO-) Always Below 1 Ω

    NG

    REPLACE TELEPHONE MICROPHONE ASSEMBLY Click here

    OK

    REPLACE NAVIGATION ECU SUB-ASSEMBLY Click here

  4. REPLACE TELEPHONE MICROPHONE ASSEMBLY


    1. Replace the telephone microphone assembly (w/ Sliding Roof) Click here.

    2. Replace the telephone microphone assembly (w/o Sliding Roof) Click here.

    3. Clear the DTCs Click here.

    4. Recheck for DTCs and check if the same DTC is output again.

      OK
      No DTCs are output.

    NG

    REPLACE MAP LIGHT ASSEMBLY Click here

    OK

    END