Acura RL. Manual - part 648

NO - There is an open in the circuit between the display unit and the navigation unit. Check for poor
connections or loose terminals at the display and navigation units. If a poor connection or loose
terminal is found, replace the affected shielded harness.

6. 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. 33: Identifying Navigation Unit Connector A (20P) Wire Side
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig. 34: Identifying Display Unit Connector (20P) Wire Side
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - There is a short to body ground in the circuit between the display unit and the navigation unit.
Replace the affected shielded harness.

NO - Replace the navigation unit. If the problem is still unresolved, replace the display unit.

PICTURE HAS LINES OR ROLLS

Diagnostic Test: Monitor Check

Missing color Navigation unit connector A(12P) Display unit 20P connector

Blue

A11

10, 20

Green

10, 20

Red

10, 20

2007 Acura RL

2005-08 ACCESSORIES AND EQUIPMENT Navigation System - RL

Friday, June 05, 2009 3:28:15 PM

Page 51

1. Check for electronic aftermarket accessories (possibly hidden) mounted near the display unit or the

navigation unit.

Are there any electronic accessories?

YES - Disable the accessories, and recheck.

NO - Go to step 2.

2. Start up the navigation picture.

Is the picture scrolling horizontally (left to right or right to left)?

YES - Check for an open or short to ground in the C SIG wire from navigation unit connector A (20P)
No. 12 terminal to display unit 20P connector No. 19 terminal. Also check for a short to ground
between display unit 20P connector No. 19 terminal and No. 20 terminal.

NO - Go to step 3.

3. Go into the Diagnostic mode, and use "RGB Color" diagnostic under Monitor Check (see

MONITOR CHECK ).

Is the picture missing a red, green or blue color?

YES - Do troubleshooting for the picture is missing a color or tone or is an odd color (see PICTURE
IS MISSING A COLOR OR TONE OR IS AN ODD COLOR ).

NO - Go to step 4.

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

5. Substitute a known-good display unit (see NAVIGATION DISPLAY UNIT

REMOVAL/INSTALLATION ), and recheck.

Is the picture OK?

NOTE:



Check the vehicle battery condition first.



Always check the navigation screen settings for brightness, 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.



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.



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

2007 Acura RL

2005-08 ACCESSORIES AND EQUIPMENT Navigation System - RL

Friday, June 05, 2009 3:28:15 PM

Page 52

YES - Check for loose connections, then replace the original display unit (see NAVIGATION
DISPLAY UNIT REMOVAL/INSTALLATION ).

NO - Check for loose connections and recheck. If a poor connection or loose terminal is found,
replace the shielded harness. If no poor or loose terminals are found, substitute a known-good
navigation unit (see NAVIGATION UNIT REMOVAL/INSTALLATION ) and recheck. If the
problem is gone, replace the original navigation unit (see NAVIGATION UNIT
REMOVAL/INSTALLATION ).

INTERFACE DIAL BUTTONS DO NOT WORK

1. Turn the ignition switch to ON (II).

2. Go into the Diagnostic mode, and use "Hard Key" test under Unit Check (see UNIT CHECK ).

Do the buttons work properly?

YES - The system is OK at this time.

NO - Go to step 3.

3. Try all the buttons on the navigation system.

Is there a specific row or columns of buttons, set of buttons, or a certain button that does not respond
properly (i.e. pressing a button in the lower left corner causes a button in the lower right corner to
respond.)?

YES - Replace the interface dial (see NAVIGATION DISPLAY UNIT
REMOVAL/INSTALLATION ).

NO - Go to step 4.

4. Turn the ignition switch to ON (II).

5. Measure the voltage between the interface dial 5P connector No. 4 terminal and body ground.

NOTE:



Check the vehicle battery condition first.



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.



After troubleshooting, enter the navigation system anti-theft code.



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



Inspect the DVD for dirt or damage.



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

2007 Acura RL

2005-08 ACCESSORIES AND EQUIPMENT Navigation System - RL

Friday, June 05, 2009 3:28:15 PM

Page 53

Fig. 35: Measuring Voltage Between Interface Dial 5P Connector No. 4 Terminal And Body
Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES - Go to step 6.

NO - Repair open in the wire between the under-dash fuse/relay box and the interface dial.

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

7. Disconnect the interface dial 5P connector.

8. Check for continuity between interface dial 5P connector No. 3 terminal and body ground.

Fig. 36: Checking Continuity Between Interface Dial 5P Connector No. 3 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 interface dial and body ground (G506).

9. Check for continuity between navigation unit connector A (20P) No. 17 terminal and interface dial 5P

connector No. 1 terminal.

2007 Acura RL

2005-08 ACCESSORIES AND EQUIPMENT Navigation System - RL

Friday, June 05, 2009 3:28:15 PM

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