NAVIGATION SYSTEM(for Radio and Display Type) Microphone Circuit between Microphone and Radio Receiver

DESCRIPTION

w/o Manual (SOS) Switch

• The radio and display receiver assembly and 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 telephone microphone assembly, and the telephone microphone assembly sends microphone signals to the radio and display receiver assembly.

w/ Manual (SOS) Switch

• The radio and display receiver assembly and 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 telephone microphone assembly, and the 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 Click here

   C

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

   B

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

   
   

   1. Disconnect the F39 radio and display receiver assembly connector.

   2. Disconnect the S18 telephone microphone assembly connector.

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

      Standard Resistance

      Tester Connection Condition Specified Condition F39-6 (SNS2) - S18-3 (SNS2) Always Below 1 Ω F39-4 (MACC) - S18-1 (MACC) Always Below 1 Ω F39-5 (MIN+) - S18-2 (MCO+) Always Below 1 Ω F39-19 (MIN-) - S18-4 (MCO-) Always Below 1 Ω F39-6 (SNS2) - Body ground Always 10 kΩ or higher F39-4 (MACC) - Body ground Always 10 kΩ or higher F39-5 (MIN+) - Body ground Always 10 kΩ or higher F39-19 (MIN-) - Body ground Always 10 kΩ or higher F39-18 (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 F39 radio and display receiver assembly connector.

   2. Reconnect the S18 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 F39-4 (MACC) - Body ground Engine 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 F39-18 (SGND) - Body ground Always Below 1 Ω F39-19 (MIN-) - Body ground Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

   OK

4. INSPECT TELEPHONE MICROPHONE ASSEMBLY

   
   

   1. Remove the telephone microphone assembly.

      Click here

   2. Inspect the telephone microphone assembly.

      Click here

      Result
      Proceed to OK NG

   
   

   NG

   GO TO STEP 6 Click here

   OK

5. INSPECT TELEPHONE MICROPHONE ASSEMBLY

   
   

   1. Reconnect the F39 radio and display receiver assembly connector.

   2. Reconnect the S18 telephone microphone assembly connector.

   3. Turn the engine switch to ACC.

   4. 

      *a	Component with harness connected (Telephone Microphone Assembly)

      Connect an oscilloscope to terminals 13 (MIC+) and 12 (MIC-) of the S18 telephone microphone assembly connector.

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

      Result
      Result Proceed to A waveform synchronized with the voice input to the telephone microphone assembly is output. A A waveform synchronized with the voice input to the 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 TELEPHONE MICROPHONE ASSEMBLY Click here

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

   
   

   1. Disconnect the F39 radio and display receiver assembly connector.

   2. Disconnect the S18 telephone microphone assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition F39-6 (SNS2) - S18-3 (SNS2) Always Below 1 Ω F39-6 (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 - TELEPHONE MICROPHONE ASSEMBLY)

   
   

   1. Disconnect the M1 telematics transceiver connector.

   2. Disconnect the S18 telephone microphone assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition M1-33 (MCVD) - S18-1 (MACC) Always Below 1 Ω M1-34 (MCI+) - S18-2 (MCO+) Always Below 1 Ω M1-35 (MCI-) - S18-4 (MCO-) Always Below 1 Ω M1-33 (MCVD) - Body ground Always 10 kΩ or higher M1-34 (MCI+) - Body ground Always 10 kΩ or higher M1-35 (MCI-) - Body ground Always 10 kΩ or higher M1-32 (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 F39 radio and display receiver assembly connector.

   2. Disconnect the M1 telematics transceiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition F39-5 (MIN+) - M1-18 (MCO+) Always Below 1 Ω F39-19 (MIN-) - M1-19 (MCO-) Always Below 1 Ω F39-5 (MIN+) - Body ground Always 10 kΩ or higher F39-19 (MIN-) - Body ground Always 10 kΩ or higher F39-18 (SGND) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

10. INSPECT RADIO & DISPLAY RECEIVER ASSEMBLY

    
    

    1. Disconnect the M1 telematics transceiver connector.

    2. Reconnect the F39 radio and display receiver assembly connector.

    3. 

       *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 F39-18 (SGND) - Body ground Always Below 1 Ω F39-19 (MIN-) - Body ground Always Below 1 Ω

       Result
       Proceed to OK NG

    
    

    NG

    REPLACE RADIO & DISPLAY RECEIVER ASSEMBLY Click here

    OK

11. INSPECT TELEMATICS TRANSCEIVER

    
    

    1. Reconnect the 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 M1-33 (MCVD) - Body ground Engine 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 M1-32 (SGND) - Body ground Always Below 1 Ω M1-35 (MCI-) - Body ground Always Below 1 Ω

       Result
       Proceed to OK NG

    
    

    NG

    REPLACE TELEMATICS TRANSCEIVER Click here

    OK

12. INSPECT TELEPHONE MICROPHONE ASSEMBLY

    
    

    1. Remove the telephone microphone assembly.

       Click here

    2. Inspect the telephone microphone assembly.

       Click here

       Result
       Proceed to OK NG

    
    

    NG

    GO TO STEP 14 Click here

    OK

13. INSPECT TELEPHONE MICROPHONE ASSEMBLY

    
    

    1. Reconnect the F39 radio and display receiver assembly connector.

    2. Reconnect the S18 telephone microphone assembly connector.

    3. Turn the engine switch to ACC.

    4. 

       *a	Component with harness connected (Telephone Microphone Assembly)

       Connect an oscilloscope to terminals 13 (MIC+) and 12 (MIC-) of the S18 telephone microphone assembly connector.

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

       Result
       Result Proceed to A waveform synchronized with the voice input to the telephone microphone assembly is output. A A waveform synchronized with the voice input to the 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 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 TELEPHONE MICROPHONE ASSEMBLY Click here