NAVIGATION SYSTEM(for HDD) Microphone Circuit between Microphone and Navigation ECU

DTC Code DTC Name
Microphone Circuit between Microphone and Navigation ECU

DESCRIPTION

w/ G-BOOK System

Using this circuit, the telematics transceiver sends power to the map light assembly (telephone microphone assembly), and the map light assembly (telephone microphone assembly) sends microphone signals to the display and navigation module display via the telematics transceiver. The display and navigation module display and map light assembly (telephone microphone assembly) are connected to each other using the microphone connection detection signal lines.

w/o G-BOOK System

Using this circuit, the display and navigation module display sends power to the map light assembly (telephone microphone assembly), and the map light assembly (telephone microphone assembly) sends microphone signals to the display and navigation module display. The display and navigation module display and map light assembly (telephone microphone assembly) are connected to each other using the microphone connection detection signal lines.

WIRING DIAGRAM

E174597E01

PROCEDURE

  1. INSPECT DISPLAY AND NAVIGATION MODULE DISPLAY

    1. E198672C03

      *a

      Component with harness connected

      (Display and Navigation Module Display)

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H4-7 (SGND) - Body ground

      Always

      Below 1 Ω

      H4-6 (MIN-) - Body ground

      Always

      Below 1 Ω

      Result

      Result

      OK

      NG
    NG

    REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY

    Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - MAP LIGHT ASSEMBLY)

    1. Disconnect the H4 display and navigation module display connector.

    2. Disconnect the W7 map light assembly connector.

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

      Standard Resistance

      Table 1. w/ G-BOOK System

      Tester Connection

      Condition

      Specified Condition

      H4-20 (SNS2) - W7-14 (SNS2)

      Always

      Below 1 Ω

      H4-20 (SNS2) - Body ground

      Always

      10 kΩ or higher

      w/o G-BOOK System

      Tester Connection

      Condition

      Specified Condition

      H4-5 (MIN+) - W7-12 (MCO+)

      Always

      Below 1 Ω

      H4-6 (MIN-) - W7-13 (MCO-)

      Always

      Below 1 Ω

      H4-4 (MACC) - W7-11 (MACC)

      Always

      Below 1 Ω

      H4-20 (SNS2) - W7-14 (SNS2)

      Always

      Below 1 Ω

      H4-5 (MIN+) - Body ground

      Always

      10 kΩ or higher

      H4-6 (MIN-) - Body ground

      Always

      10 kΩ or higher

      H4-7 (SGND) - Body ground

      Always

      10 kΩ or higher

      H4-4 (MACC) - Body ground

      Always

      10 kΩ or higher

      H4-20 (SNS2) - Body ground

      Always

      10 kΩ or higher

      Result

      Result

      Proceed to

      OK (w/ G-BOOK System)

      A

      OK (w/o G-BOOK System)

      B

      NG

      C
    B

    CHECK DISPLAY AND NAVIGATION MODULE DISPLAYClick here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

  3. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - TELEMATICS TRANSCEIVER)

    1. Disconnect the H4 display and navigation module display connector.

    2. Disconnect the G56 telematics transceiver connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H4-5 (MIN+) - G56-18 (MCO+)

      Always

      Below 1 Ω

      H4-6 (MIN-) - G56-19 (MCO-)

      Always

      Below 1 Ω

      H4-5 (MIN+) - Body ground

      Always

      10 kΩ or higher

      H4-6 (MIN-) - Body ground

      Always

      10 kΩ or higher

      H4-7 (SGND) - Body ground

      Always

      10 kΩ or higher

      Result

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

    1. Disconnect the G56 telematics transceiver connector.

    2. Disconnect the W7 map light assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G56-33 (MCVD) - W7-11 (MACC)

      Always

      Below 1 Ω

      G56-34 (MCI+) - W7-12 (MCO+)

      Always

      Below 1 Ω

      G56-35 (MCI-) - W7-13 (MCO-)

      Always

      Below 1 Ω

      G56-33 (MCVD) - Body ground

      Always

      10 kΩ or higher

      G56-34 (MCI+) - Body ground

      Always

      10 kΩ or higher

      G56-35 (MCI-) - Body ground

      Always

      10 kΩ or higher

      G56-32 (SGND) - Body ground

      Always

      10 kΩ or higher

      Result

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK TELEMATICS TRANSCEIVER

    1. E205521C01

      *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

      G56-33 (MCVD) - Body ground

      Engine switch on (ACC)

      4 to 6 V

      Result

      Result

      OK

      NG
    NG

    REPLACE TELEMATICS TRANSCEIVER

    Click here

    OK

  6. INSPECT MAP LIGHT ASSEMBLY

    1. Remove the map light assembly

      Click here

    2. E140936N06

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      14 (SNS2) - 13 (MCO-)

      Always

      Below 1 Ω

      Result

      Result

      OK

      NG
    NG

    REPLACE TELEPHONE MICROPHONE ASSEMBLYClick here

    OK

  7. CHECK MAP LIGHT ASSEMBLY

    1. E205727C02

      *a

      Component with harness connected

      (Map Light Assembly)

      Connect an oscilloscope to terminals W7-12 (MCO+) and W7-13 (MCO-) of the telephone microphone assembly connector.

    2. Turn the engine switch on (ACC).

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

      Result

      Result

      Proceed to

      Waveform synchronized with the voice input to the map light assembly is output

      A

      Waveform synchronized with the voice input to the map light assembly is not output

      B
    A

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

    B

  8. 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
    A

    END

    B

    REPLACE MAP LIGHT ASSEMBLY

    Click here

  9. CHECK DISPLAY AND NAVIGATION MODULE DISPLAY

    1. E198672C04

      *a

      Component with harness connected

      (Display and Navigation module Display)

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      H4-4 (MACC) - Body ground

      Engine switch on (ACC)

      4 to 6 V

      Result

      Result

      OK

      NG
    NG

    REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY

    Click here

    OK

  10. INSPECT MAP LIGHT ASSEMBLY

    1. Remove the map light assembly

      Click here

    2. E140936C04

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      14 (SNS2) - 13 (MCO-)

      Always

      Below 1 Ω

      Result

      Result

      OK

      NG
    NG

    REPLACE TELEPHONE MICROPHONE ASSEMBLYClick here

    OK

  11. CHECK MAP LIGHT ASSEMBLY

    1. E205727C03

      *a

      Component with harness connected

      (Map Light Assembly)

      Connect an oscilloscope to terminals W7-12 (MCO+) and W7-13 (MCO-) of the telephone microphone assembly connector.

    2. Turn the engine switch on (ACC).

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

      Result

      Result

      Proceed to

      Waveform synchronized with the voice input to the map light assembly is output

      A

      Waveform synchronized with the voice input to the map light assembly is not output

      B
    A

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

    B

  12. 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
    A

    END

    B

    REPLACE MAP LIGHT ASSEMBLY

    Click here