NAVIGATION SYSTEM (for Navigation Receiver Type), 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)

  • Navigation receiver assembly

  • Harness or connector

WIRING DIAGRAM

B000L5IE04

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT NAVIGATION RECEIVER ASSEMBLY


    1. B000LJ4E06
      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
      I67-19 (MIN-) - Body ground Always Below 1 Ω
      Result
      Result Proceed to
      OK A
      NG (for TMMK Made) B
      NG (for TMC Made) C

    B

    REPLACE NAVIGATION RECEIVER ASSEMBLY (for TMMK Made) Click here

    C

    REPLACE NAVIGATION RECEIVER ASSEMBLY (for TMC Made) Click here

    A

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


    1. Disconnect the I67 navigation receiver assembly connector.

    2. Disconnect the S7 roof console box assembly (telephone microphone assembly) connector (for TMC Made).

      Disconnect the S14 roof console box assembly (telephone microphone assembly) connector (for TMMK Made).

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

      Standard Resistance
      Tester Connection Condition Specified Condition

      I67-6 (SNS2) - S7-15 (SNS2)*1

      I67-6 (SNS2) - S14-15 (SNS2)*2

      		 Always Below 1 Ω

      I67-19 (MIN-) - S7-12 (MCO-)*1

      I67-19 (MIN-) - S14-12 (MCO-)*2

      		 Always Below 1 Ω
      I67-6 (SNS2) - Body ground Always 10 kΩ or higher
      I67-19 (MIN-) - Body ground Always 10 kΩ or higher

      • *1: for TMC Made

        *2: for TMMK Made


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


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

      Remove the roof console box assembly (telephone microphone assembly) (for TMC Made) Click here.

    2. B000J0CE58
      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
      Result
      Result Proceed to
      OK (for TMMK Made) A
      OK (for TMC Made) B
      NG (for TMMK Made) C
      NG (for TMC Made) D

    B

    REPLACE NAVIGATION RECEIVER ASSEMBLY (for TMC Made) Click here

    C

    REPLACE ROOF CONSOLE BOX ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) (for TMMK Made) Click here

    D

    REPLACE ROOF CONSOLE BOX ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) (for TMC Made) Click here

    A

    REPLACE NAVIGATION RECEIVER ASSEMBLY (for TMMK Made) Click here