NAVIGATION SYSTEM (for DVD) Microphone Circuit between Microphone and Navigation ECU

DESCRIPTION

This circuit sends a microphone signal from the map light assembly (telephone microphone assembly) to the display and navigation module display.

It also supplies power from the display and navigation module display to the map light assembly (telephone microphone assembly).

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR

   
   

   1. Disconnect the J122 display and navigation module display connector.

   2. Disconnect the R5 map light assembly connector.

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

      Standard Resistance

      Tester Connection Condition Specified Condition J122-20 (SNS2) - R5-6 (SNS2) Always Below 1 Ω J122-4 (MACC) - R5-15 (MACC) Always Below 1 Ω J122-5 (MIN+) - R5-16 (MCO+) Always Below 1 Ω J122-6 (MIN-) - R5-17 (MCO-) Always Below 1 Ω J122-20 (SNS2) - Body ground Always 10 kΩ or higher J122-4 (MACC) - Body ground Always 10 kΩ or higher J122-5 (MIN+) - Body ground Always 10 kΩ or higher J122-6 (MIN-) - Body ground Always 10 kΩ or higher J122-7 (SGND) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

2. INSPECT DISPLAY AND NAVIGATION MODULE DISPLAY

   
   

   1. Reconnect the J122 display and navigation module display connector.

   2. 

      Text in Illustration

      *1	Component with harness connected (Display and Navigation Module Display)

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

      Standard Voltage
      Tester Connection Condition Specified Condition J122-4 (MACC) - 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 J122-7 (SGND) - Body ground Always Below 1 Ω J122-6 (MIN-) - Body ground Always Below 1 Ω

   
   

   NG

   REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Click here

   OK

3. INSPECT MAP LIGHT ASSEMBLY

   
   
   1. 

      Text in Illustration

      *1	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 R5-6 (SNS2) - R5-17 (MCO-) Always Below 1 Ω

   
   

   NG

   REPLACE TELEPHONE MICROPHONE ASSEMBLY Click here

   OK

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

4. REPLACE TELEPHONE MICROPHONE ASSEMBLY

   
   

   1. Replace the telephone microphone assembly Click here.

      Note

      The connector of the telephone microphone assembly is too small to be inspected. Therefore, after replacing the telephone microphone assembly, inspect it using the connector of the map light assembly.

   2. 

      Text in Illustration

      *1	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 R5-6 (SNS2) - R5-17 (MCO-) Always Below 1 Ω

   
   

   NG

   REPLACE MAP LIGHT ASSEMBLY Click here

   OK

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