NAVIGATION SYSTEM Microphone Circuit between Microphone and Radio Receiver

DESCRIPTION

w/o Manual (SOS) Switch

• The radio and display 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 radio and display 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 radio and display receiver assembly.

w/ Manual (SOS) Switch

• The radio and display 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 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 radio and display receiver assembly via the telematics transceiver.

WIRING DIAGRAM

PROCEDURE

1. CHECK MICROPHONE (OPERATION CHECK)

   
   

   1. 

      Enter the "Microphone Check" screen. Refer to Check Microphone in Operation Check.

      Click here

   2. When a voice is input into the microphone, check that the microphone input level meter changes according to the input voice.

      OK
      Check result is normal.

      Result
      Result Proceed to OK A NG (w/o Manual (SOS) Switch) B NG (w/ Manual (SOS) Switch) C

   
   

   A

   REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY for Sedan: Click here REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY for Hatchback, Wagon: Click here

   C

   CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)) Click here

   B

2. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY))

   
   

   1. Disconnect the E60 radio and display receiver assembly connector.

   2. Disconnect the O8 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 E60-6 (SNS2) - O8-5 (SNS2) Always Below 1 Ω E60-4 (MACC) - O8-16 (MACC) Always Below 1 Ω E60-5 (MIN+) - O8-15 (MIC+) Always Below 1 Ω E60-19 (MIN-) - O8-14 (MIC-) Always Below 1 Ω E60-6 (SNS2) or O8-5 (SNS2) - Body ground Always 10 kΩ or higher E60-4 (MACC) or O8-16 (MACC) - Body ground Always 10 kΩ or higher E60-5 (MIN+) or O8-15 (MIC+) - Body ground Always 10 kΩ or higher E60-19 (MIN-) or O8-14 (MIC-) - Body ground Always 10 kΩ or higher E60-18 (SGND) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

3. INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY

   
   

   1. Reconnect the E60 radio and display receiver assembly connector.

   2. Reconnect the O8 map light assembly (telephone microphone assembly) connector.

   3. 

      *a	Component with harness connected (Radio and Display Receiver Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition E60-4 (MACC) - Body ground Ignition switch 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 E60-18 (SGND) - Body ground Always Below 1 Ω E60-19 (MIN-) - Body ground Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY for Sedan: Click here REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY for Hatchback, Wagon: Click here

   OK

4. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)

   
   

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

      Click here

   2. 

      *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 5 (SNS2) - 14 (MIC-) Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   GO TO STEP 6 Click here

   OK

5. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)

   
   

   1. Reconnect the E60 radio and display receiver assembly connector.

   2. Reconnect the O8 map light assembly (telephone microphone assembly) connector.

   3. Turn the ignition switch to ACC.

   4. 

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

      Connect an oscilloscope to terminals 15 (MIC+) and 14 (MIC-) of the O8 map light assembly (telephone microphone assembly) connector.

   5. Check the waveform of the map light assembly (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

   
   

   A

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

   B

6. REPLACE TELEPHONE MICROPHONE ASSEMBLY

   
   

   1. Replace the telephone microphone assembly with a new or known good 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

   
   

   A

   END

   B

   REPLACE MAP LIGHT ASSEMBLY Click here

7. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY))

   
   

   1. Disconnect the E60 radio and display receiver assembly connector.

   2. Disconnect the O8 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 E60-6 (SNS2) - O8-5 (SNS2) Always Below 1 Ω E60-6 (SNS2) or O8-5 (SNS2) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

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

   
   

   1. Disconnect the E143 telematics transceiver connector.

   2. Disconnect the O8 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 E143-33 (MCVD) - O8-16 (MACC) Always Below 1 Ω E143-34 (MCI+) - O8-15 (MIC+) Always Below 1 Ω E143-35 (MCI-) - O8-14 (MIC-) Always Below 1 Ω E143-33 (MCVD) or O8-16 (MACC) - Body ground Always 10 kΩ or higher E143-34 (MCI+) or O8-15 (MIC+) - Body ground Always 10 kΩ or higher E143-35 (MCI-) or O8-14 (MIC-) - Body ground Always 10 kΩ or higher E143-32 (SGND) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

9. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - TELEMATICS TRANSCEIVER)

   
   

   1. Disconnect the E60 radio and display receiver assembly connector.

   2. Disconnect the E143 telematics transceiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition E60-5 (MIN+) - E143-18 (MCO+) Always Below 1 Ω E60-19 (MIN-) - E143-19 (MCO-) Always Below 1 Ω E60-5 (MIN+) or E143-18 (MCO+) - Body ground Always 10 kΩ or higher E60-19 (MIN-) or E143-19 (MCO-) - Body ground Always 10 kΩ or higher E60-18 (SGND) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

10. INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY

    
    

    1. Disconnect the E143 telematics transceiver connector.

    2. 

       *a	Component with harness connected (Radio and Display Receiver Assembly)

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

       Standard Resistance
       Tester Connection Condition Specified Condition E60-18 (SGND) - Body ground Always Below 1 Ω E60-19 (MIN-) - Body ground Always Below 1 Ω

       Result
       Proceed to OK NG

    
    

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    OK

11. INSPECT TELEMATICS TRANSCEIVER

    
    

    1. Reconnect the E143 telematics transceiver connector.

    2. 

       *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 E143-33 (MCVD) - Body ground Ignition switch 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 E143-32 (SGND) - Body ground Always Below 1 Ω E143-35 (MCI-) - Body ground Always Below 1 Ω

       Result
       Proceed to OK NG

    
    

    NG

    REPLACE TELEMATICS TRANSCEIVER Click here

    OK

12. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)

    
    

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

       Click here

    2. 

       *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 5 (SNS2) - 14 (MIC-) Always Below 1 Ω

       Result
       Proceed to OK NG

    
    

    NG

    GO TO STEP 14 Click here

    OK

13. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)

    
    

    1. Reconnect the E60 radio and display receiver assembly connector.

    2. Reconnect the O8 map light assembly (telephone microphone assembly) connector.

    3. Reconnect the E143 telematics transceiver connector.

    4. Turn the ignition switch to ACC.

    5. 

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

       Connect an oscilloscope to terminals 15 (MIC+) and 14 (MIC-) of the O8 map light assembly (telephone microphone assembly) connector.

    6. Check the waveform of the map light assembly (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

    
    

    A

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

    B

14. 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