NAVIGATION SYSTEM Microphone Circuit between Microphone and Radio Receiver

DESCRIPTION


WIRING DIAGRAM

A01GJ1YE04

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. CONFIRM MODEL


    1. Choose the model to be inspected.

      Model
      Model Proceed to
      w/o Telematics Transceiver A
      w/ Telematics Transceiver B

    B

    Click here

    A

  2. CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY)


    1. Disconnect the L146 multi-media module receiver assembly connector.

    2. Disconnect the X4 map light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L146-27 (MIN+) - X4-21 (MI1+) Always Below 1 Ω
      L146-29 (MACC) - X4-22 (ACC) Always Below 1 Ω
      L146-48 (MIN-) - X4-20 (MIC-) Always Below 1 Ω
      L146-49 (SNS2) - X4-31 (SNS2) Always Below 1 Ω
      L146-27 (MIN+) - Body ground Always 10 kΩ or higher
      L146-28 (SGND) - Body ground Always 10 kΩ or higher
      L146-29 (MACC) - Body ground Always 10 kΩ or higher
      L146-48 (MIN-) - Body ground Always 10 kΩ or higher
      L146-49 (SNS2) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK MULTI-MEDIA MODULE RECEIVER ASSEMBLY


    1. A01GK5ZE77
      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 Switch Condition Specified Condition
      L146-29 (MACC) - Body ground Engine switch on (ACC) 4 to 6 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L146-28 (SGND) - Body ground Always Below 1 Ω
      L146-48 (MIN-) - Body ground Always Below 1 Ω

    NG

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY Click here

    OK

  4. INSPECT MAP LIGHT ASSEMBLY


    1. A01GKPPE12

      Remove the map light assembly Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      20 (MIC-) - 31 (SNS2) Always Below 1 Ω

    NG

    CHECK TELEPHONE MICROPHONE ASSEMBLY Click here

    OK

  5. CHECK MAP LIGHT ASSEMBLY


    1. A01GL2WE04
      Text in Illustration
      *a

      Component with harness connected

      (Map Light Assembly)

      Turn the engine switch on (ACC).

    2. Connect an oscilloscope to terminals X4-21 (MI1+) and X4-20 (MIC-) of the map light assembly connector.

    3. 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 is output. A
      A waveform synchronized with the voice input to the map light assembly is not output. B

    B

    CHECK TELEPHONE MICROPHONE ASSEMBLY Click here

    A

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

  6. CHECK TELEPHONE MICROPHONE ASSEMBLY


    1. Replace the telephone microphone assembly with a new or normally functioning one 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 (TELEPHONE MICROPHONE ASSEMBLY IS DEFECTIVE)

  7. CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY)


    1. Disconnect the L146 multi-media module receiver assembly connector.

    2. Disconnect the X4 map light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L146-49 (SNS2) - X4-31 (SNS2) Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - TELEMATICS TRANSCEIVER)


    1. Disconnect the L146 multi-media module receiver assembly connector.

    2. Disconnect the L181 telematics transceiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L146-27 (MIN+) - L181-18 (MCO+) Always Below 1 Ω
      L146-48 (MIN-) - L181-19 (MCO-) Always Below 1 Ω
      L146-27 (MIN+) - Body ground Always 10 kΩ or higher
      L146-48 (MIN-) - Body ground Always 10 kΩ or higher
      L146-28 (SGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - MAP LIGHT ASSEMBLY)


    1. Disconnect the L181 telematics transceiver connector.

    2. Disconnect the X4 map light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L181-33 (MCVD) - X4-22 (ACC) Always Below 1 Ω
      L181-34 (MCI+) - X4-21 (MI1+) Always Below 1 Ω
      L181-35 (MCI-) - X4-20 (MIC-) Always Below 1 Ω
      L181-33 (MCVD) - Body ground Always 10 kΩ or higher
      L181-34 (MCI+) - Body ground Always 10 kΩ or higher
      L181-35 (MCI-) - Body ground Always 10 kΩ or higher
      L181-32 (SGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK MULTI-MEDIA MODULE RECEIVER ASSEMBLY


    1. A01GK5ZE78
      Text in Illustration
      *a

      Component with harness connected

      (Multi-media Module Receiver Assembly)

      Disconnect the L181 telematics transceiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L146-28 (SGND) - Body ground Always Below 1 Ω
      L146-48 (MIN-) - Body ground Always Below 1 Ω

    NG

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY Click here

    OK

  11. CHECK TELEMATICS TRANSCEIVER


    1. A01GNCTE06
      Text in Illustration
      *a

      Component with harness connected

      (Telematics Transceiver)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      L181-33 (MCVD) - Body ground Engine switch on (ACC) 4 to 6 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L181-32 (SGND) - Body ground Always Below 1 Ω
      L181-35 (MCI-) - Body ground Always Below 1 Ω

    NG

    REPLACE TELEMATICS TRANSCEIVER Click here

    OK

  12. INSPECT MAP LIGHT ASSEMBLY


    1. A01GKPPE12

      Remove the map light assembly Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      20 (MIC-) - 31 (SNS2) Always Below 1 Ω

    NG

    CHECK TELEPHONE MICROPHONE ASSEMBLY Click here

    OK

  13. CHECK MAP LIGHT ASSEMBLY


    1. A01GL2WE04
      Text in Illustration
      *a

      Component with harness connected

      (Map Light Assembly)

      Turn the engine switch on (ACC).

    2. Connect an oscilloscope to terminals X4-21 (MI1+) and X4-20 (MIC-) of the map light assembly connector.

    3. 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 is output. A
      A waveform synchronized with the voice input to the map light assembly is not output. B

    B

    CHECK TELEPHONE MICROPHONE ASSEMBLY Click here

    A

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

  14. CHECK TELEPHONE MICROPHONE ASSEMBLY


    1. Replace the telephone microphone assembly with a new or normally functioning one 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 (TELEPHONE MICROPHONE ASSEMBLY IS DEFECTIVE)