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

DESCRIPTION

w/o Telematics Transceiver

• The radio and display receiver assembly and map 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/ Telematics Transceiver

• 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

CAUTION / NOTICE / HINT

PROCEDURE

1. CONFIRM MODEL

   
   

   1. Choose the model to be inspected.

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

   
   

   B

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

   A

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

   
   

   1. Disconnect the H51 radio and display receiver assembly connector.

   2. Disconnect the W7 map light assembly connector.

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

      Standard Resistance

      Tester Connection Condition Specified Condition H51-5 (MIN+) - W7-12 (MCO+) Always Below 1 Ω H51-4 (MACC) - W7-11 (MACC) Always Below 1 Ω H51-19 (MIN-) - W7-13 (MCO-) Always Below 1 Ω H51-6 (SNS2) - W7-14 (SNS2) Always Below 1 Ω H51-5 (MIN+) - Body ground Always 10 kΩ or higher H51-18 (SGND) - Body ground Always 10 kΩ or higher H51-4 (MACC) - Body ground Always 10 kΩ or higher H51-19 (MIN-) - Body ground Always 10 kΩ or higher H51-6 (SNS2) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

3. INSPECT MAP LIGHT ASSEMBLY

   
   

   1. Remove the map light assembly.

      Click here

   2. Remove the telephone microphone assembly.

      Click here

   3. 

      *a	Component without harness connected (Map Light Assembly)

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

      Standard Resistance

      Tester Connection Condition Specified Condition A-11 (MACC) - B-5 (MACC) Always Below 1 Ω A-12 (MCO+) - B-3 (MIC+) Always Below 1 Ω A-13 (MCO-) - B-2 (MIC-) Always Below 1 Ω A-14 (SNS2) - B-1 (SNS2) Always Below 1 Ω A-11 (MACC) - A-12 (MCO+) Always 10 kΩ or higher A-11 (MACC) - A-13 (MCO-) Always 10 kΩ or higher A-11 (MACC) - A-14 (SNS2) Always 10 kΩ or higher A-12 (MCO+) - A-13 (MCO-) Always 10 kΩ or higher A-12 (MCO+) - A-14 (SNS2) Always 10 kΩ or higher A-13 (MCO-) - A-14 (SNS2) Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE MAP LIGHT ASSEMBLY Click here

   OK

4. CHECK TELEPHONE MICROPHONE ASSEMBLY

   
   

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

      Click here

   2. Check that the malfunction disappears.

      OK
      Malfunction disappears.

      Result
      Proceed to OK NG

   
   

   OK

   END (TELEPHONE MICROPHONE ASSEMBLY IS DEFECTIVE)

   NG

   REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

5. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY)

   
   

   1. Disconnect the H51 radio and display receiver assembly connector.

   2. Disconnect the W7 map light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition H51-6 (SNS2) - W7-14 (SNS2) Always Below 1 Ω H51-6 (SNS2) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

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

   
   

   1. Disconnect the H51 radio and display receiver assembly connector.

   2. Disconnect the G187 telematics transceiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition H51-5 (MIN+) - G187-18 (MCO+) Always Below 1 Ω H51-19 (MIN-) - G187-19 (MCO-) Always Below 1 Ω H51-5 (MIN+) - Body ground Always 10 kΩ or higher H51-19 (MIN-) - Body ground Always 10 kΩ or higher H51-18 (SGND) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

7. CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - MAP LIGHT ASSEMBLY)

   
   

   1. Disconnect the G187 telematics transceiver connector.

      Click here

   2. Disconnect the W7 map light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition G187-33 (MCVD) - W7-11 (MACC) Always Below 1 Ω G187-34 (MCI+) - W7-12 (MCO+) Always Below 1 Ω G187-35 (MCI-) - W7-13 (MCO-) Always Below 1 Ω G187-33 (MCVD) - Body ground Always 10 kΩ or higher G187-34 (MCI+) - Body ground Always 10 kΩ or higher G187-35 (MCI-) - Body ground Always 10 kΩ or higher G187-32 (SGND) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

8. INSPECT MAP LIGHT ASSEMBLY

   
   

   1. Remove the map light assembly.

      Click here

   2. Remove the telephone microphone assembly.

      Click here

   3. 

      *a	Component without harness connected (Map Light Assembly)

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

      Standard Resistance

      Tester Connection Condition Specified Condition A-11 (MACC) - B-5 (MACC) Always Below 1 Ω A-12 (MCO+) - B-3 (MIC+) Always Below 1 Ω A-13 (MCO-) - B-2 (MIC-) Always Below 1 Ω A-14 (SNS2) - B-1 (SNS2) Always Below 1 Ω A-11 (MACC) - A-12 (MCO+) Always 10 kΩ or higher A-11 (MACC) - A-13 (MCO-) Always 10 kΩ or higher A-11 (MACC) - A-14 (SNS2) Always 10 kΩ or higher A-12 (MCO+) - A-13 (MCO-) Always 10 kΩ or higher A-12 (MCO+) - A-14 (SNS2) Always 10 kΩ or higher A-13 (MCO-) - A-14 (SNS2) Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE MAP LIGHT ASSEMBLY Click here

   OK

9. CHECK TELEMATICS TRANSCEIVER

   
   

   1. Disconnect the W7 map light assembly 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 Switch Condition Specified Condition G187-33 (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 G187-32 (SGND) - Body ground Always Below 1 Ω G187-35 (MCI-) - Body ground Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE TELEMATICS TRANSCEIVER Click here

   OK

10. CHECK TELEPHONE MICROPHONE ASSEMBLY

    
    

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

       Click here

    2. Check that the malfunction disappears.

       OK
       Malfunction disappears.

       Result
       Proceed to OK NG

    
    

    OK

    END (TELEPHONE MICROPHONE ASSEMBLY IS DEFECTIVE)

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here