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

DESCRIPTION

• 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.

WIRING DIAGRAM

*a	(Shielded)
*b	Telephone Microphone Assembly
*c	Radio and Display Receiver Assembly

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 NG A OK B

   
   

   B

   REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

   A

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

   
   

   1. Disconnect the I96 radio and display receiver assembly connector.

   2. Disconnect the O2 telephone microphone assembly connector.

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

      Standard Resistance

      Tester Connection Condition Specified Condition I96-6 (SNS2) - O2-3 (SNS2) Always Below 1 Ω I96-4 (MACC) - O2-1 (MACC) Always Below 1 Ω I96-5 (MIN+) - O2-2 (MCO+) Always Below 1 Ω I96-19 (MIN-) - O2-4 (MCO-) Always Below 1 Ω I96-6 (SNS2) or O2-3 (SNS2) - Body ground Always 10 kΩ or higher I96-4 (MACC) or O2-1 (MACC) - Body ground Always 10 kΩ or higher I96-5 (MIN+) or O2-2 (MCO+) - Body ground Always 10 kΩ or higher I96-19 (MIN-) or O2-4 (MCO-) - Body ground Always 10 kΩ or higher I96-18 (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 I96 radio and display receiver assembly connector.

   2. Reconnect the O2 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 I96-4 (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 I96-18 (SGND) - Body ground Always Below 1 Ω I96-19 (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. 

      *a	Component without harness connected (Telephone Microphone Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition 3 (SNS2) - 4 (MCO-) Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE TELEPHONE MICROPHONE ASSEMBLY Click here

   OK

5. INSPECT TELEPHONE MICROPHONE ASSEMBLY

   
   

   1. Reconnect the I96 radio and display receiver assembly connector.

   2. Reconnect the O2 telephone microphone assembly connector.

   3. Turn the power switch on (ACC).

   4. 

      *a	Component with harness connected (Telephone Microphone Assembly)

      Connect an oscilloscope to terminals 2 (MCO+) and 4 (MCO-) of the O2 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

   REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

   B

   REPLACE TELEPHONE MICROPHONE ASSEMBLY Click here