PRECAUTIONS ON SERVICING MMES


PRIOR TO DISCONNECTING THE VEHICLE BATTERY


A lot of information, which is set by customer, is stored in the MMES. If the battery terminals are disconnected, this information may disappear. Prior to the terminal disconnection, the agreement of the customer should be obtained.

DIAGNOSIS TIPS CONCERNING THE NAVIGATION FUNCTION


1.To pinpoint current location precisely on the navigation screen, at least four GPS signals are needed. If the GPS signals are not received due to poor satellite communication or driving conditions, wrong current location will be displayed although the MMES is OK. Therefore, prior to troubleshooting, ask your customer in which conditions the system is used.
GPS signal status can be checked on the MMES GPS data screen.
How to check
  1. Touch the "GPS position quality" icon on the navigation screen to display the Quick menu.
  2. Press the "GPS" button on the Quick menu screen to display the GPS data screen.
  3. Check whether at least four GPS signals are received.
2.If the system is not OK, diagnose the system according to the trouble symptom chart.