Component Tests and General Diagnostics

INSPECTION

MICROPHONE SWITCH CHECK





Use an ohmmeter to measure the resistance value between the terminal.






ILLUMINATION CHECK





Apply the battery voltage of microphone switch connector terminal No. 4 and 1, and check if the microphone switch illuminates.
NOTE:
Make sure that the polarity is correct.

INTERPHONE MICROPHONE CHECK

By operating the PHONE button, the connection of the interphone microphone can be checked.





1. Turn the ignition switch to the "ON" or "ACC" position.
2. Check that the hands free cellular phone system is not in voice recognition mode.
3. Press and hold the PHONE button for approximately 5 seconds.
4. The hands-free module checks the connection with the interphone microphone. If no abnormality is present, the voice information "No faults present" is output, and if an abnormality is present, "Microphone faults" is output.