NAVIGATION SYSTEM (for Navigation Receiver Type) Microphone Circuit between Microphone and Navigation Receiver Assembly

DESCRIPTION


WIRING DIAGRAM

A01JAENE01

INSPECTION PROCEDURE

PROCEDURE


  1. 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
      L130-4 (MACC) - U3-5 (MACC) Always Below 1 Ω
      L130-5 (MIN+) - U3-4 (MCO+) Always Below 1 Ω
      L130-19 (MIN-) - U3-3 (MCO-) Always Below 1 Ω
      L130-6 (SNS2) - U3-2 (SNS2) Always Below 1 Ω
      L130-4 (MACC) - Body ground Always 10 kΩ or higher
      L130-5 (MIN+) - Body ground Always 10 kΩ or higher
      L130-19 (MIN-) - Body ground Always 10 kΩ or higher
      L130-18 (SGND) - Body ground Always 10 kΩ or higher
      L130-6 (SNS2) - Body ground Always 10 kΩ or higher
      w/ Sliding Roof
      Tester Connection Condition Specified Condition
      L130-4 (MACC) - U13-6 (MACC) Always Below 1 Ω
      L130-5 (MIN+) - U13-5 (MCO+) Always Below 1 Ω
      L130-19 (MIN-) - U13-4 (MCO-) Always Below 1 Ω
      L130-6 (SNS2) - U13-3 (SNS2) Always Below 1 Ω
      L130-4 (MACC) - Body ground Always 10 kΩ or higher
      L130-5 (MIN+) - Body ground Always 10 kΩ or higher
      L130-19 (MIN-) - Body ground Always 10 kΩ or higher
      L130-18 (SGND) - Body ground Always 10 kΩ or higher
      L130-6 (SNS2) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT NAVIGATION ECU SUB-ASSEMBLY


    1. Reconnect the navigation ECU sub-assembly connector.

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

    3. A01JD1PE06
      Text in Illustration
      *a

      Component with harness connected

      (Navigation ECU Sub-assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      L130-4 (MACC) - Body ground Power 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
      L130-18 (SGND) - Body ground Always Below 1 Ω
      L130-19 (MIN-) - Body ground Always Below 1 Ω

    NG

    INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) Click here

    OK

    REPLACE NAVIGATION ECU SUB-ASSEMBLY Click here

  3. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)


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

    2. 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

  4. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)


    1. Reconnect the navigation ECU sub-assembly connector.

    2. A01JB6JE01
      Text in Illustration
      *A w/o Sliding Roof
      *B w/ Sliding Roof
      *a

      Component without harness connected

      (Map Light Assembly (Telephone Microphone Assembly))

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

    3. Turn the power switch on (ACC).

    4. Connect an oscilloscope to terminals 4 (MCO+) and 3 (MCO-) of the map light assembly (telephone microphone assembly) connector (w/o Sliding Roof).

    5. Connect an oscilloscope to terminals 5 (MCO+) and 4 (MCO-) of the map light assembly (telephone microphone assembly) connector (w/ Sliding Roof).

    6. 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 (w/ Sliding Roof) Click here.

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

    3. 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