Honda Accord 2008 Manual page 2665

07/11/02 10:05:47 61TA0000_230_0221
Navigation System
Symptom Troubleshooting (cont'd)
9. Reconnect navigation unit connector A (8P).
10. Do the forced starting of the display (see page
23-239).
Is the diagnosis menu of the picture diagnosis
displayed?
−
YES Go into Self-Diagnosis mode (see page
23-172) to check the links.
NO − Go to step 11.
11. Shield the display unit from the sun with your hand,
and check that the display is back lit (only back light
is ON.)
Can you see the back light?
YES − Replace the navigation unit (see page 23-240)
and retest. If the problem is still present, replace
the navigation display unit (see page 23-241).
NO − Go to step 12.
12. Turn the ignition switch to ON (II).
23-220
13. Measure the voltage between body ground and
navigation display unit 28P connector terminals
No. 1 and No. 2 individually.
NAVIGATION DISPLAY UNIT 28P CONNECTOR
＋
B (WHT) ACC (PUR)
Wire side of female terminals
Is there battery voltage?
−
YES Go to step 14.
NO − If the ＋ B wire does not have voltage, repair
open in the wire between the under-hood fuse/
relay box and the navigation display unit 28P
connector. If the ACC wire does not have voltage,
repair open in the wire between the under-dash
fuse/relay box and the navigation display unit 28P
connector.
14. Measure the voltage between the navigation
display unit 28P connector terminal No. 10 and
body ground.
NAVIGATION DISPLAY UNIT 28P CONNECTOR
Wire side of female terminals
Is there less than 0.2 V ?
−
YES Replace the navigation display unit.
NO − Repair open or poor connections between the
navigation display and body ground (G401)
(see page 22-40).
GND (BLK)
＊０３
＊０４