Honda 2004 Odyssey Service Manual page 2045

Navigation System
Symptom Troubleshooting
Special Tools Required
Test harness 07LAJ-PT3020A
No picture is shown on the display
1. Check the NAVIGATION (10A) fuse in the
passenger's under-dash fuse relay box, and
reinstall the fuse if it is OK.
Is the f use OK ?
YES Go to step 2.
NO Replace the fuse and recheck.
2. Turn the ignition switch to ACC (I).
3. Operate the radio and listen to the audio.
Can audio be heard?
YES Go to step 4.
NO Check the ACC circuit.
4. Turn the ignition switch ON (II).
5. Perform the forced starting of display (see page 22-
383).
Is the diagnosis menu of the picture diagnosis
displayed?
YES Perform the System Links Test in the Picture
Diagnosis Test menu (see page 22-376).
NO Go to step 6.
22-366
6. Measure the voltage between body ground and
navigation unit connector C (8P) terminals No. 1
and No. 2 individually.
NAVIGATION UNIT CONNECTOR C (8P)
B (WHT/BLU)
Wire side of female terminals
Is there battery voltage?
YES Go to step 7.
NO Repair open in the wire between the
passenger's under-dash fuse/relay box and the
navigation unit.
7. Check for continuity between navigation unit
connector C (8P) terminal No. 4 and body ground.
NAVIGATION UNIT CONNECTOR C (8P)
Wire side of female terminals
Is there continuity?
YES Go to step 8.
NO Repair open in the wire between the
navigation unit and body ground (G501).
8. Turn the ignition switch OFF.
9. Shield the display unit from the sun with your hand,
and check that the display is black (only back light
is ON.)
Can you see the back light?
YES Replace the navigation unit.
NO Replace the display unit.
ACC (WHT/RED)
GND (BLK)