Acura RL (1996-2004 year). Manual — part 674
Troubleshooting
'00 - 01 Models
No picture is shown on the display
Check the +B fuse:
Check the BACK UP/RADIO (7.5 A)
fuse in the under-hood fuse/relay
box.
Is the fuse OK?
Replace the fuse and recheck.
NOTE: Reinstall the fuse if it is OK.
NO
YES
Check the ACC fuse:
Check the ACC/RADIO (10 A) fuse
in the under-dash fuse/relay box.
Is the fuse OK?
NO
Replace the fuse and recheck.
NOTE: Reinstall the fuse if it is OK.
YES
Check for an open in the power
source circuit:
1. Turn the ignition switch ON
(II).
2. Measure the voltage between
body ground and the naviga-
tion unit connector C (8P) ter-
minal No. 1 and No. 2 individ-
ually.
NAVIGATION UNIT CONNECTOR C (8P)
Wire side of female terminals
Is there battery voltage?
NO
Repair open in the wire between
the under-hood (or under-dash)
fuse/relay box and navigation
unit.
YES
Check for an open in the GND
circuit:
Check for continuity between the
navigation unit connector C (8P)
terminal No. 4 and body ground.
Is there continuity?
YES
NO
• Repair open in the wire between
the navigation unit and body
ground.
• Repair poor ground (G603).
Forced starting of display:
1. Turn the ignition switch OFF.
2. Perform forced starting of dis-
).
Is the diagnosis menu of the
picture diagnosis displayed?
YES
Perform the system links.
NO
Main Menu
Table of Contents
Check the picture:
Check that the black picture is
displayed (only back light is ON).
NOTE: To check, shield the display unit from
the sun with your hand.
Is the black picture displayed?
YES
Replace the navigation unit.
NO
Check the DISPLAY BUS circuit:
1. Disconnect the navigation
unit and display unit connec-
tors.
2. Check for continuity between
the display unit connector
(20P) terminal No. 5 and the
navigation unit connector B
(16P) terminal No. 7. There
should be continuity.
3. Check for continuity between
the display unit connector
(20P) terminal No. 15 and the
navigation unit connector B
(16P) terminal No. 15. There
should be continuity.
4. Check for continuity between
the same terminals and body
ground. There should be no
continuity.
Does the voltage pulse O V
to approx. 5 V?
NO
Replace the navigation unit.
YES
Replace the display unit.
Wire side of female terminals
DISPLAY UNIT CONNECTOR (20P)
DISPLAY UNIT CONNECTOR (20P)
Wire side of female terminals
NAVIGATION UNIT
CONNECTOR B (16P)
DISP BUS (-)
DISP BUS (+)
There is an open or short to body
ground between the display unit
and the navigation unit. Replace
the affected shielded harness.
Are all checks OK?
NO
YES
Check the DISPLAY BUS Signal:
1. Reconnect the navigation unit
connectorB (16P).
2. Check for voltage between
body ground and the display
unit connector (20P) terminals
No. 5 and No. 15 individually.
Main Menu
Table of Contents
Troubleshooting
'00 - 01 Models (cont'd)
The picture is missing a color or tone
RGB color check:
1. Perform the start-up proce-
dure for Picture Diagnosis
(see page
).
2. Touch the Monitor Check but-
ton then press the RGB Color
).
Are the Red, Green, and Blue
colored circles shown?
Touch the return button. Touch
the color change button, then
touch the Default button to restore
the standard color settings.
YES
NO
Check for an open in the RGB
signal line:
1. Turn the ignition switch off.
2. Disconnect navigation unit
connector A (12P), and the
display unit connector (20P).
3. Check for continuity terminals
between the navigation unit
connector A (12P) and the dis-
play unit connector (20P).
Is there continuity?
NO
There is an open in the circuit
between the navigation unit and
the display unit. Replace the
affected shielded harness.
YES
Check for a short to body ground
in the RGB signal line:
Check for continuity between
terminals of the navigation unit
connector A (12P).
Is there continuity?
Replace the navigation unit.
NO
YES
Navigation Unit Connector A (12P)
Main Menu
Table of Contents
Display unit buttons do not work
Check for an open in the power
source circuit:
1. Turn the ignition switch ON
(II).
2. Measure the voltage between
body ground and the display
unit connector (20P) terminal
No. 1 and No. 2 individually.
Is there battery voltage?
Are all checks OK?
Repair open in the wire between
the under-hood (or under-dash)
fuse/relay box and display unit.
NO
• Repair the open in the wire
between the display unit and
body ground.
• Repair poor ground (G251).
Wire side of female terminals
DISPLAY UNIT CONNECTOR (20P)
DISP BUS (+)
There is an open or short to body
ground between the display unit
and the navigation unit. Replace
the affected shielded harness.
Check the DISPLAY BUS circuit:
1. Disconnect the navigation
unit and display unit connec-
tors.
2. Check for continuity between
the display unit connector
(20P) terminal No. 5 and the
navigation unit connector B
(16P) terminal No. 7. There
should be continuity.
3. Check for continuity between
the display unit connector
(20P) terminal No. 15 and the
navigation unit connector B
(16P) terminal No. 15. There
should be continuity.
4. Check for continuity between
the same terminals and body
ground. There should be no
continuity.
Check for an open in the GND
circuit:
1. Turn the ignition switch OFF.
2. Check for continuity between
the display unit connector
(20P) terminal No. 10 and
body ground.
Is there continuity?
YES
Replace the display unit.
YES
NO
Wire side of female terminals
DISPLAY UNIT CONNECTOR (20P)
DISP BUS (+)
DISP BUS (-)
Wire side of female terminals
DISP BUS (-)
NAVIGATION UNIT
CONNECTOR B (16P)
DISP BUS (+)
DISP BUS (-)
DISPLAY UNIT CONNECTOR (20P)
ACC
Main Menu
Table of Contents
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