Acura RL. Manual - part 647

fuse relay box and the navigation unit. If the ACC wire does not have voltage, repair open in the wire
between the driver's under-dash fuse/relay box and the navigation unit.

6. Turn the ignition switch to LOCK (0).

7. Disconnect navigation unit connector C (8P).

8. Check for continuity between navigation unit connector C (8P) No. 4 terminal and body ground.

Fig. 29: Checking Continuity Between Navigation Unit Connector C (8P) No. 4 Terminal And
Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Go to step 9.

NO - Repair open in the wire between the navigation unit and body ground (G602).

9. Reconnect navigation unit connector C (8P).

10. Do the forced starting of the display (see FORCED STARTING OF DISPLAY ).

Is the diagnosis menu of the picture diagnosis displayed?

YES - Go into the Diagnostic mode and use the "Navi System Link" diagnostic (see NAVI SYSTEM
LINK ) 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 NAVIGATION UNIT REMOVAL/INSTALLATION ) and
retest. If the problem is still present, replace the display unit (see NAVIGATION DISPLAY UNIT
REMOVAL/INSTALLATION ).

NO - Go to step 12.

12. Turn the ignition switch ON (II).

2007 Acura RL

2005-08 ACCESSORIES AND EQUIPMENT Navigation System - RL

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13. Measure the voltage between body ground and display unit 20P connector No. 1 and No. 2 terminals

individually.

Fig. 30: Measuring Voltage Between Body Ground And Display Unit 20P Connector No. 1, 2
Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES - Replace the display unit.

NO - If the +B wire does not have voltage, repair an open in the wire between the driver's under-dash
fuse relay box and the display unit 2P connector. If the ACC wire does not have voltage, repair an
open in the wire between the under-dash fuse/relay box and the display unit 20P connector.

VEHICLE POSITION ICON CONSTANTLY LEAVES ROAD, MOVES ERRATICALLY, OR IS
VERY FAR FROM ACTUAL POSITION

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 GPS ICON IS WHITE OR
NOT SHOWN ).

NO - Go to step 2.

2. Go into the Diagnostic Menu, and use the "Yaw Rate" test (see YAW RATE TUNING ) to check the

NOTE:



This is not 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 perform Map matching (see MAP
MATCHING ) before proceeding with the troubleshooting.



Always make sure that the correct DVD color and version are installed.



Check on-line for service bulletins or other service information for the
navigation system.



Inspect the DVD for dirt or damage.

2007 Acura RL

2005-08 ACCESSORIES AND EQUIPMENT Navigation System - RL

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Page 48

yaw rate sensor.

3. Go into the Diagnostic Menu, and use the "Car Status" test (see CAR STATUS ) 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 NAVIGATION UNIT
REMOVAL/INSTALLATION ). If the problem is the vehicle speed pulse, check for an open or
short in the wire between the navigation unit and the PCM. If the wire is OK, substitute a known-good
navigation unit and recheck. If there is still no VSP signal, replace the ECM/PCM.

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 NAVIGATION UNIT
REMOVAL/INSTALLATION ).

PICTURE IS MISSING A COLOR OR TONE OR IS AN ODD COLOR

1. Go into the Diagnostic menu, and use "RGB Color" test under Monitor Check (see MONITOR

CHECK ).

Are the red, green, and blue colored circles shown?

YES - The system is OK at this time.

NO - Go to step 2.

NOTE:



Always make sure that the correct DVD color and version are installed.



Inspect the DVD for dirt or damage.



Check on-line for service bulletins or other service information for the
navigation system.



Always check the navigation screen settings for brightness, contrast,
black level and the color screen for map color and menu color.



Always check the connectors for poor connections or loose terminals.



Before troubleshooting, make sure you have the anti-theft codes for the
audio system and the navigation system.



Check the vehicle battery condition first.



Enter the anti-theft codes for the audio system and the navigation
system.

2007 Acura RL

2005-08 ACCESSORIES AND EQUIPMENT Navigation System - RL

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2. Turn the ignition switch to OFF.

3. Disconnect navigation unit connector A (20P) and the display unit 20P connector.

4. Check for loose terminals at navigation unit connector A (20P) and the display unit 20P connector.

Are there loose terminals?

YES - Repair the terminal.

NO - Go to step 5.

5. Check for continuity between the appropriate terminals of navigation unit connector A (20P) and the

display unit 20P connector based on the missing color(s).

NAVIGATION UNIT CONNECTOR REFERENCE

Fig. 31: Identifying Navigation Unit Connector A (20P) Wire Side
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig. 32: Identifying Display Unit Connector (20P) Wire Side
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Go to step 6.

Missing color Navigation unit connector A (20P) Display unit 20P connector Wire color

Blue

A11

YEL

Green

RED

Red

WHT

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