Komatsu PC88MR-10 Shop Manual page 473

a If "GPS" does not become "OK", check
the communication antenna and cable for
external failure. If any, repair it and repeat
KOMTRAX Communication opening
again.
4) When all items are "OK", "KOMTRAX
Communication Opened." screen is
automatically displayed.
Press Enter
Communication
machine side opening is completed.
PC88MR-10
switch. If "GPS
Status" appears, the
&
30 Testing and adjusting
Electrical system
30-123