NAVIGATION SYSTEM Microphone Circuit between Microphone and Navigation Receiver Assembly

DESCRIPTION


WIRING DIAGRAM

A01623LE53

INSPECTION PROCEDURE

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 Navigation System Click here.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY))


    1. Disconnect the J137 multi-media module receiver assembly connector.

    2. Disconnect the R5 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
      J137-29 (MACC) - R5-15 (MACC) Always Below 1 Ω
      J137-27 (MIN+) - R5-16 (MCO+) Always Below 1 Ω
      J137-48 (MIN-) - R5-17 (MCO-) Always Below 1 Ω
      J137-49 (SNS2) - R5-6 (SNS2) Always Below 1 Ω
      J137-29 (MACC) - Body ground Always 10 kΩ or higher
      J137-27 (MIN+) - Body ground Always 10 kΩ or higher
      J137-48 (MIN-) - Body ground Always 10 kΩ or higher
      J137-28 (SGND) - Body ground Always 10 kΩ or higher
      J137-49 (SNS2) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT MULTI-MEDIA MODULE RECEIVER ASSEMBLY


    1. Reconnect the J137 multi-media module receiver assembly connector.

    2. Reconnect the R5 map light assembly (telephone microphone assembly) connector.

    3. A01635JE41
      Text in Illustration
      *a

      Component with harness connected

      (Multi-media Module Receiver Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      J137-29 (MACC) - Body ground Engine switch on (ACC) 4 to 6 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J137-28 (SGND) - Body ground Always Below 1 Ω
      J137-48 (MIN-) - Body ground Always Below 1 Ω

    NG

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY Click here

    OK

  3. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)


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

    2. A015YLOE03
      Text in Illustration
      *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
      17 (MCO-) - 6 (SNS2) Always Below 1 Ω

    NG

    REPLACE TELEPHONE MICROPHONE ASSEMBLY Click here

    OK

  4. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)


    1. Reconnect the J137 multi-media module receiver assembly connector.

    2. Reconnect the R5 map light assembly (telephone microphone assembly) connector.

    3. Turn the engine switch on (ACC).

    4. A016223E01
      Text in Illustration
      *a

      Component with harness connected

      (Map Light Assembly (Telephone Microphone Assembly))

      Connect an oscilloscope to terminals 16 (MCO+) and 17 (MCO-) of the R5 map light assembly (telephone microphone assembly) connector.

    5. Check the waveform of the telephone microphone assembly using the oscilloscope.

      Result
      Result Proceed to
      A waveform synchronized with the voice input to the map light assembly (telephone microphone assembly) is output A
      A waveform synchronized with the voice input to the map light assembly (telephone microphone assembly) is not output B

    B

    REPLACE TELEPHONE MICROPHONE ASSEMBLY Click here

    A

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

  5. REPLACE TELEPHONE MICROPHONE ASSEMBLY


    1. Replace the telephone microphone assembly Click here.

    2. Check if the same malfunction recurs.

      Result
      Result Proceed to

      Malfunction does not recur

      (returns to normal)

      		 A
      Malfunction recurs B

    B

    REPLACE MAP LIGHT ASSEMBLY Click here

    A

    END