Acura TSX / Honda Accord CL. Manual — part 166

Fig. 40: Checking For Continuity Between The Appropriate Terminals Of Display Unit 20P
Connector Based On The Missing Color(s)

2004 Acura TSX

2004 ACCESSORIES & EQUIPMENT Navigation System - TSX

Fig. 41: Identifying Display Unit 20P Connector Terminals

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 -Check for poor connections or loose terminals at the navigation unit and recheck. If a poor
connection or loose terminal is found, replace the shielded harness. If no poor connections or loose
terminals are found, substitute a known-good navigation unit and recheck. If the problem is gone, replace
the navigation unit (see NAVIGATION UNIT REMOVAL/INSTALLATION ). If not replace the
display unit (see AUDIO-HVAC DISPLAY PANEL REMOVAL/INSTALLATION ).

PICTURE HAS LINES/OTHER ISSUES

2004 Acura TSX

2004 ACCESSORIES & EQUIPMENT Navigation System - TSX

Diagnostic Test: Monitor Check

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)
terminal No. 12 to display unit 20P connector terminal No. 19. Also check for a short to ground between
display unit 20P connector terminal No. 19 and terminal No. 20.

NO -Go to step 3.

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

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

YES -Do troubleshooting for the picture is missing a red, green or blue color or tone (see PICTURE IS
MISSING A RED/GREEN/BLUE COLOR OR TONE, OR ROLLING PICTURE ).

NO -Go to step 4.

4. Turn the ignition switch OFF.

5. Substitute a known-good display unit (see AUDIO-HVAC DISPLAY PANEL

REMOVAL/INSTALLATION ), and recheck.

Is the picture OK?

YES -Check for loose connections, then replace the original display unit (see AUDIO-HVAC DISPLAY
PANEL 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

NOTE:

z

Always check the connectors for poor connections or loose terminals.

z

Before troubleshooting, get the navigation system anti-theft codes.

z

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

2004 Acura TSX

2004 ACCESSORIES & EQUIPMENT Navigation System - TSX

the original navigation unit (see NAVIGATION UNIT REMOVAL/INSTALLATION ).

DISPLAY UNIT BUTTONS DO NOT WORK

1. Turn the ignition switch to ACC (I).

2. Try several navigation buttons and touch screen buttons.

Do all buttons function properly?

YES -The system is OK at this time.

NO -

z

If all navigation buttons and touch screen are inoperative, go to step 3.

z

If some navigation buttons operate normally, while others do not, go into the Diagnostic mode and
use "Touch Panel" diagnostic under Monitor Check (see TOUCH PANEL CHECK ) and if
necessary, "Display" diagnostic under Unit Check (see DISPLAY ).

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

individually.

NOTE:

z

Always check the connectors for poor connections or loose terminals.

z

Before troubleshooting, get the navigation system anti-theft codes.

z

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

2004 Acura TSX

2004 ACCESSORIES & EQUIPMENT Navigation System - TSX