NAVIGATION SYSTEM Microphone Circuit between Microphone and Navigation Receiver Assembly

DESCRIPTION

• The multi-media module receiver assembly and map light assembly (telephone microphone assembly) are connected to each other using the microphone connection detection signal lines.

• Using this circuit, the multi-media module receiver assembly sends power to the map light assembly (telephone microphone assembly), and the map light assembly (telephone microphone assembly) sends microphone signals to the multi-media module receiver assembly (w/o Telematics Transceiver).

• 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 multi-media module receiver assembly via the telematics transceiver (w/ Telematics Transceiver).

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CONFIRM MODEL

   
   

   1. Choose the model to be inspected.

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

   
   

   B

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

   A

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

   
   

   1. Disconnect the G35 multi-media module receiver assembly connector.

   2. Disconnect the T10 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 G35-29 (MACC) - T10-33 (MACC) Always Below 1 Ω G35-27 (MIN+) - T10-34 (MCO+) Always Below 1 Ω G35-48 (MIN-) - T10-35 (MCO-) Always Below 1 Ω G35-49 (SNS2) - T10-36 (SNS2) Always Below 1 Ω G35-29 (MACC) - Body ground Always 10 kΩ or higher G35-27 (MIN+) - Body ground Always 10 kΩ or higher G35-48 (MIN-) - Body ground Always 10 kΩ or higher G35-28 (SGND) - Body ground Always 10 kΩ or higher G35-49 (SNS2) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

3. INSPECT MULTI-MEDIA MODULE RECEIVER ASSEMBLY

   
   

   1. Reconnect the G35 multi-media module receiver assembly connector.

   2. Reconnect the T10 map light assembly (telephone microphone assembly) connector.

   3. 

      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 G35-29 (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 G35-28 (SGND) - Body ground Always Below 1 Ω G35-48 (MIN-) - Body ground Always Below 1 Ω

   5. Proceed to the next step based on the inspection result.

      Result
      Result Proceed to NG A OK B

   
   

   B

   INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) Click here

   A

   REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY Click here

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

   
   

   1. Disconnect the G35 multi-media module receiver assembly connector.

   2. Disconnect the T10 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 G35-49 (SNS2) - T10-36 (SNS2) Always Below 1 Ω

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

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

   
   

   1. Disconnect the G35 multi-media module receiver assembly connector.

   2. Disconnect the G25 telematics transceiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition G35-27 (MIN+) - G25-18 (MCO+) Always Below 1 Ω G35-48 (MIN-) - G25-19 (MCO-) Always Below 1 Ω G35-27 (MIN+) - Body ground Always 10 kΩ or higher G35-48 (MIN-) - Body ground Always 10 kΩ or higher G35-28 (SGND) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

6. CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY))

   
   

   1. Disconnect the G25 telematics transceiver connector.

   2. Disconnect the T10 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 G25-33 (MCVD) - T10-33 (MACC) Always Below 1 Ω G25-34 (MCI+) - T10-34 (MCO+) Always Below 1 Ω G25-35 (MCI-) - T10-35 (MCO-) Always Below 1 Ω G25-33 (MCVD) - Body ground Always 10 kΩ or higher G25-34 (MCI+) - Body ground Always 10 kΩ or higher G25-35 (MCI-) - Body ground Always 10 kΩ or higher G25-32 (SGND) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

7. INSPECT MULTI-MEDIA MODULE RECEIVER ASSEMBLY

   
   

   1. Disconnect the G25 telematics transceiver connector.

   2. 

      Text in Illustration

      *a	Component with harness connected (Multi-media Module Receiver Assembly)

      Reconnect the G35 multi-media module receiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition G35-28 (SGND) - Body ground Always Below 1 Ω G35-48 (MIN-) - Body ground Always Below 1 Ω

   
   

   NG

   REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY Click here

   OK

8. INSPECT TELEMATICS TRANSCEIVER

   
   

   1. Reconnect the G25 telematics transceiver connector.

   2. 

      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 Condition Specified Condition G25-33 (MCVD) - Body ground Power switch on (ACC) 4 to 6 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition G25-35 (MCI-) - Body ground Always Below 1 Ω G25-32 (SGND) - Body ground Always Below 1 Ω

   
   

   NG

   REPLACE TELEMATICS TRANSCEIVER Click here

   OK

9. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)

   
   

   1. Disconnect the T10 map light assembly (telephone microphone assembly) connector.

   2. 

      Text in Illustration

      *a	Component without harness connected (Map Light Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition T10-36 (SNS2) - T10-35 (MCO-) Always Below 1 Ω

   
   

   NG

   REPLACE TELEPHONE MICROPHONE ASSEMBLY Click here

   OK

10. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)

    
    

    1. Reconnect the G35 multi-media module receiver assembly connector.

    2. Reconnect the T10 map light assembly (telephone microphone assembly) connector.

    3. Reconnect the G25 telematics transceiver connector (w/ Telematics Transceiver).

    4. Turn the power switch on (ACC).

    5. 

       Text in Illustration

       *a	Component with harness connected (Map Light Assembly (Telephone Microphone Assembly))

       Connect an oscilloscope to terminals 34 (MCO+) and 35 (MCO-) of the T10 map light assembly connector.

    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

11. 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