4. Troubleshooting
15
Flow 2
L/L data and time
are normal?
Carry out GPS
selftest
5 V?
No
OK
No
Yes
OK
M5 V at ANT
connector.
Disconnect GPS antenna cable
and check for discontinuity and
short circuit.
Position fix
Wrong initialization
(Defective keep-alive
battery)
Defective GN-8091
OK?
Change antenna.
1) Defective antenna connector or cable
2) Defective power supply circuit on 20P8188
No
Defective antenna connector or cable
Change
GN - 8091
1) Interference from other unit
2) Noise on power line
Yes
End
No position fix
Enter correct
L/L thru initial
set - up menu.
NG
NG
NG
OK
Yes
Symptom: No fix
