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.

CAUTION / NOTICE / HINT

PROCEDURE

1. Click here

   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.

      Tip:
      

      • 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

     REPLACE RADIO RECEIVER ASSEMBLYClick here

   • NGClick here
2. Click here

   CONFIRM MODEL

   
   

   1. Choose the model to be inspected.

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

   
   
   • AClick here
   • BClick here
3. Click here

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

   
   

   1. Disconnect the K58 radio receiver assembly connector.

   2. Disconnect the S4 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 K58-49 (SNS2) - S4-1 (SNS2) Always Below 1 Ω K58-29 (MACC) - S4-4 (MACC) Always Below 1 Ω K58-27 (MIN+) - S4-3 (MCO+) Always Below 1 Ω K58-48 (MIN-) - S4-2 (MCO-) Always Below 1 Ω K58-49 (SNS2) or S4-1 (SNS2) - Body ground Always 10 kΩ or higher K58-29 (MACC) or S4-4 (MACC) - Body ground Always 10 kΩ or higher K58-27 (MIN+) or S4-3 (MCO+) - Body ground Always 10 kΩ or higher K58-48 (MIN-) or S4-2 (MCO-) - Body ground Always 10 kΩ or higher K58-28 (SGND) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   
   • OKClick here
   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR

4. Click here

   INSPECT RADIO RECEIVER ASSEMBLY

   
   

   1. Reconnect the K58 radio receiver assembly connector.

   2. Reconnect the S4 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 K58-29 (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 K58-28 (SGND) - Body ground Always Below 1 Ω K58-48 (MIN-) - Body ground Always Below 1 Ω

      Result
      Proceed to OK NG

   
   
   • OKClick here

     GO TO STEP 10

   • NG

     REPLACE RADIO RECEIVER ASSEMBLYClick here

5. Click here

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

   
   

   1. Disconnect the K58 radio receiver assembly connector.

   2. Disconnect the S4 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 K58-49 (SNS2) - S4-1 (SNS2) Always Below 1 Ω K58-49 (SNS2) or S4-1 (SNS2) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   
   • OKClick here
   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR

6. Click here

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

   
   

   1. Disconnect the K58 radio receiver assembly connector.

   2. Disconnect the K66 telematics transceiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition K58-27 (MIN+) - K66-18 (MCO+) Always Below 1 Ω K58-48 (MIN-) - K66-19 (MCO-) Always Below 1 Ω K58-27 (MIN+) or K66-18 (MCO+) - Body ground Always 10 kΩ or higher K58-48 (MIN-) or K66-19 (MCO-) - Body ground Always 10 kΩ or higher K58-28 (SGND) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   
   • OKClick here
   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR

7. Click here

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

   
   

   1. Disconnect the K158 telematics transceiver connector.

   2. Disconnect the S4 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 K158-33 (MCVD) - S4-4 (MACC) Always Below 1 Ω K158-34 (MCI+) - S4-3 (MCO+) Always Below 1 Ω K158-35 (MCI-) - S4-2 (MCO-) Always Below 1 Ω K158-33 (MCVD) or S4-4 (MACC) - Body ground Always 10 kΩ or higher K158-34 (MCI+) or S4-3 (MCO+) - Body ground Always 10 kΩ or higher K158-35 (MCI-) or S4-2 (MCO-) - Body ground Always 10 kΩ or higher K158-32 (SGND) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   
   • OKClick here
   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR

8. Click here

   INSPECT RADIO RECEIVER ASSEMBLY

   
   

   1. Disconnect the K158 telematics transceiver connector.

   2. 

      *a	Component with harness connected (Radio Receiver Assembly)

      Reconnect the K58 radio receiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition K58-28 (SGND) - Body ground Always Below 1 Ω K58-48 (MIN-) - Body ground Always Below 1 Ω

      Result
      Proceed to OK NG

   
   
   • OKClick here
   • NG

     REPLACE RADIO RECEIVER ASSEMBLYClick here

9. Click here

   INSPECT TELEMATICS TRANSCEIVER

   
   

   1. Reconnect the K158 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 K158-33 (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 K158-35 (MCI-) - Body ground Always Below 1 Ω K158-32 (SGND) - Body ground Always Below 1 Ω

      Result
      Proceed to OK NG

   
   
   • OKClick here
   • NG

     REPLACE TELEMATICS TRANSCEIVERClick here

10. Click here

    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

    
    
    • OKClick here
    • NGClick here

      GO TO STEP 12

11. Click here

    INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)

    
    

    1. Reconnect the K58 radio receiver assembly connector.

    2. Reconnect the S4 map light assembly (telephone microphone assembly) connector.

    3. Reconnect the K158 telematics transceiver connector (w/ Telematics Transceiver).

    4. Turn the power switch on (ACC).

    5. 

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

       Connect an oscilloscope to terminals 3 (MCO+) and 2 (MCO-) of the S4 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 TABLEClick here

    • BClick here
12. Click here

    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 ASSEMBLYClick here