Honda Accord 2008 Manual page 2666

07/11/02 10:05:47 61TA0000_230_0222
Vehicle position icon constantly leaves road,
moves erratically, or is very far from actual
position
NOTE:
• Check that the GPS antenna is plugged in.
• This is not the same condition as when driving off-
road (or on a fire or logging road). This condition is
caused by a loss of map matching from a bad sensor
input. Check for after market or other objects that can
block the GPS signal. Always do the Map matching
(see page 23-129) before proceeding with the
troubleshooting.
• Make sure that the correct DVD color and version are
installed.
• Inspect the DVD for dirt or damage.
• Check any official Honda service website for more
service information about the navigation system.
• Check the GPS signal reception in an open area.
1. Check the GPS icon on the navigation picture.
Is the GPS icon white?
YES − Do the troubleshooting for GPS icon is white
or not shown (see page 23-226).
NO − Go to step 2.
2. Go into the Self-Diagnosis Mode, and use the Yaw
Rate test (see page 23-188) to check the yaw rate
sensor.
3. Go into the Self-Diagnosis Mode, and use the Car
Status test (see page 23-189) to check the vehicle
speed pulse.
Are the yaw rate sensor and vehicle speed pulse
OK ?
YES − The problem may be normal. Check to see if
the problem occurs in the same place. If it does, the
problem could be in the database. Go to step 4.
−
NO If the problem is the yaw rate sensor, replace
the navigation unit (see page 23-240). If the
problem is the vehicle speed pulse, check for an
open in the wire between the navigation unit and
the PCM. If the wire is OK, troubleshoot the vehicle
speed signal circuit.
4. Substitute a known-good navigation unit, and
check to see if the problem occurs in the same
place.
Does the problem occur in the same place?
−
YES The problem is in the database. Report the
problem according to the Navigation System
Manual under Reporting Errors.
NO − Replace the original navigation unit (see page
23-240).
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Picture is missing a color or tone or is an odd
color
NOTE:
• Check the connectors for poor connections or loose
terminals.
• Make sure that the correct DVD color and version are
installed.
• Inspect the DVD for dirt or damage.
• Check any official Honda service website for more
service information about the navigation system.
• Check the navigation screen settings for brightness,
contrast, and black level, and check the color screen
for map color and menu color.
• Before troubleshooting, make sure you have anti-
theft codes for the audio system and the navigation
system.
• After troubleshooting, enter the anti-theft codes for
the audio system and the navigation system.
• Check the vehicle battery condition first.
• Check for aftermarket accessories that may interfere
with the navigation system.
1. Go into the Detail Information & Settings select
Monitor Check, and use RGB Color test under
Monitor Check (see page 23-176).
Are the red, green, and blue colored circles
shown?
YES − The system is OK at this time.
−
NO Go to step 2.
2. Turn the ignition switch to LOCK (0).
3. Disconnect navigation unit connector B (32P) and
the navigation display unit 28P connector.
4. Check for loose terminals at navigation unit
connector B (32P) and the navigation display unit
28P connector.
Are there loose terminals?
−
YES Repair the terminal.
NO − Go to step 5.
ＴＡ０８ＡＮ１Ｊ３６１００００００００ＦＡＡＴ１１
(cont'd)
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