NAVIGATION SYSTEM Microphone Circuit between Microphone and Navigation Receiver Assembly

DESCRIPTION

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

• w/o Telematics Transceiver:

  Using this circuit, the radio 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 receiver assembly.

• w/ 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 radio 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.

   3. Push the recording switch and perform voice recording.

      Tech Tips

      
      

      • Select the recording switch with the blower motor of the air conditioning system stopped. If an outlet of the air conditioning system is facing the microphone, noise may be recorded.

      • Voice can be recorded for up to 5 seconds.

   4. Check that the recording indicator remains on while recording and that the recorded voice is played normally without noise or distortion.

      OK
      All check results are normal.

      Result
      Proceed to OK NG

   
   

   OK

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

   NG

2. CHECK MODEL

   
   

   1. Choose the model to be inspected.

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

   
   

   B

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

   A

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

   
   

   1. Disconnect the O57 radio receiver assembly connector.

   2. Disconnect the W4 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 O57-49 (SNS2) - W4-1 (SNS2) Always Below 1 Ω O57-49 (SNS2) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

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

   
   

   1. Disconnect the O57 radio receiver assembly connector.

   2. Disconnect the O150 telematics transceiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition O57-27 (MIN+) - O150-18 (MCO+) Always Below 1 Ω O57-48 (MIN-) - O150-19 (MCO-) Always Below 1 Ω O57-27 (MIN+) - Body ground Always 10 kΩ or higher O57-48 (MIN-) - Body ground Always 10 kΩ or higher O57-28 (SGND) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

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

   
   

   1. Disconnect the O150 telematics transceiver connector.

   2. Disconnect the W4 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 O150-33 (MCVD) - W4-4 (MACC) Always Below 1 Ω O150-34 (MCI+) - W4-3 (MCO+) Always Below 1 Ω O150-35 (MCI-) - W4-2 (MCO-) Always Below 1 Ω O150-33 (MCVD) - Body ground Always 10 kΩ or higher O150-34 (MCI+) - Body ground Always 10 kΩ or higher O150-35 (MCI-) - Body ground Always 10 kΩ or higher O150-32 (SGND) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

6. INSPECT RADIO RECEIVER ASSEMBLY

   
   

   1. Disconnect the O150 telematics transceiver connector.

   2. 

      *a	Component with harness connected (Radio Receiver Assembly)

      Reconnect the O57 radio receiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition O57-28 (SGND) - Body ground Always Below 1 Ω O57-48 (MIN-) - Body ground Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE RADIO RECEIVER ASSEMBLY Click here

   OK

7. INSPECT TELEMATICS TRANSCEIVER

   
   

   1. Reconnect the O150 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 O150-33 (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 O150-35 (MCI-) - Body ground Always Below 1 Ω O150-32 (SGND) - Body ground Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   OK

   GO TO STEP 10 Click here

   NG

   REPLACE TELEMATICS TRANSCEIVER Click here

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

   
   

   1. Disconnect the O57 radio receiver assembly connector.

   2. Disconnect the W4 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 O57-49 (SNS2) - W4-1 (SNS2) Always Below 1 Ω O57-29 (MACC) - W4-4 (MACC) Always Below 1 Ω O57-27 (MIN+) - W4-3 (MCO+) Always Below 1 Ω O57-48 (MIN-) - W4-2 (MCO-) Always Below 1 Ω O57-49 (SNS2) - Body ground Always 10 kΩ or higher O57-29 (MACC) - Body ground Always 10 kΩ or higher O57-27 (MIN+) - Body ground Always 10 kΩ or higher O57-48 (MIN-) - Body ground Always 10 kΩ or higher O57-28 (SGND) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

9. INSPECT RADIO RECEIVER ASSEMBLY

   
   

   1. Reconnect the O57 radio receiver assembly connector.

   2. Reconnect the W4 map light assembly (telephone microphone assembly) connector.

   3. 

      *a	Component with harness connected (Radio Receiver Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition O57-29 (MACC) - Body ground Engine 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 O57-28 (SGND) - Body ground Always Below 1 Ω O57-48 (MIN-) - Body ground Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE RADIO RECEIVER ASSEMBLY Click here

   OK

10. INSPECT MAP LIGHT 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 1 (SNS2) - 2 (MCO-) Always Below 1 Ω

       Result
       Proceed to OK NG

    
    

    NG

    GO TO STEP 12 Click here

    OK

11. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)

    
    

    1. Reconnect the O57 radio receiver assembly connector.

    2. Reconnect the W4 map light assembly (telephone microphone assembly) connector.

    3. Turn the engine switch on (ACC).

    4. 

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

       Connect an oscilloscope to terminals 3 (MCO+) and 2 (MCO-) of the W4 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

12. 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