Page 2425 of 4323
I28233
± DIAGNOSTICSNAVIGATION SYSTEM
DI±2223
2417 Author: Date:
2005 SEQUOIA (RM1146U)
4 Navigation check mode (Navi color bar check).
PREPARATION:
Enter the ºNavigation Checkº mode (NAVI Color Bar Check)
(See page DI±2180).
CHECK:
Check that color bars match the displayed names.
OK:
Color bars match the displayed names.
NG Replace radio and navigation assy.
OK
Proceed to next circuit inspection shown in problem symptoms table (See page DI±2184).
Page 2426 of 4323
I28254
DI±2224
± DIAGNOSTICSNAVIGATION SYSTEM
2418 Author: Date:
2005 SEQUOIA (RM1146U)
No sound can be heard from speakers (Audio Is mute)
INSPECTION PROCEDURE
1 Check audio settings.
PREPARATION:
Enter the sound adjustment screen by pressing the ºSOUNDº
switch on the AUDIO display.
CHECK:
Set volume, fader, and balance to the initial values and check
that sound is normal.
OK:
Audio returns to normal.
HINT:
Sound quality adjustment items vary depending on the type of
the amplifier.
OK End.
NG
Proceed to next circuit inspection shown in problem symptoms table (See page DI±2184).
DIDCJ±01
Page 2427 of 4323
± DIAGNOSTICSNAVIGATION SYSTEM
DI±2225
2419 Author: Date:
2005 SEQUOIA (RM1146U)
Radio broadcast cannot be received (Poor reception)
INSPECTION PROCEDURE
1 Check if radio auto±search functions properly.
CHECK:
Check if the radio auto±search functions properly.
Perform the auto±search of the radio and check that it functions normally.
OK:
The radio auto±search functions properly.
OK Replace radio and navigation assy.
NG
2 Check optional components.
CHECK:
Check optional component (sun shade film, telephone antenna, etc.).
Check whether or not any optional component such as the sun shade film and the telephone antenna
is installed.
OK:
Optional component is not installed.
NG Effect from optional component.
OK
DIDCK±01
Page 2428 of 4323
I28255
DI±2226
± DIAGNOSTICSNAVIGATION SYSTEM
2420 Author: Date:
2005 SEQUOIA (RM1146U)
3 Inspect radio and navigation assy.
PREPARATION:
Remove the antenna plug from the radio and navigation assy.
CHECK:
With the radio and navigation assy connector connected, turn
the ignition switch to the ACC position.
Turn on the radio and choose the AM mode.
Place a screwdriver or a piece of metal such as thin wire on an
antenna jack of the radio and navigation assy and check that
the noise is heard from the speaker.
OK:
Noise occurs.
NG Replace radio and navigation assy.
OK
4 Check antenna assy.
CHECK:
Check that the antenna is securely installed.
OK:
The antenna is installed properly.
NG Install antenna assy properly.
OK
Page 2429 of 4323
± DIAGNOSTICSNAVIGATION SYSTEM
DI±2227
2421 Author: Date:
2005 SEQUOIA (RM1146U)
5 Check antenna cord sub±assy.
PREPARATION:
Remove the antenna plug of the radio and navigation assy and antenna assy.
CHECK:
Measure the resistance between the antenna assy and radio and navigation assy to check for an open circuit
in the antenna cord sub±assy.
OK:
Below 1 W
CHECK:
Measure the resistance between the antenna cord sub±assy and body ground to check for a short circuit
in the antenna cord sub±assy.
OK:
10 kW or higher
NG Replace antenna cord sub±assy.
OK
6 Replace amplifier antenna assy.
CHECK:
Replace the amplifier antenna assy and check if it operates normally.
OK:
The amplifier antenna assy operates normally.
OK Normal operation.
NG
Proceed to next circuit inspection shown in problem symptoms table (See page DI±2184).
Page 2430 of 4323
I28256
DI±2228
± DIAGNOSTICSNAVIGATION SYSTEM
2422 Author: Date:
2005 SEQUOIA (RM1146U)
CD cannot be inserted/played or CD is ejected right after insertion
INSPECTION PROCEDURE
1 Check CD.
CHECK:
Check if the CD is a normal audio CD that has no cracks, scratches, deformations, dirt, or other defects.
OK:
The CD is a normal audio CD without any problems.
HINT:
Translucent or deformed CDs cannot be played.
CD±ROMs (even those with music) and CD±R discs cannot be played.
A copy protected CD should not be used.
An adaptor is not necessary to play 3.2 inch (8 cm) CDs.
NG Replace CD.
OK
2 Check radio and navigation assy.
CHECK:
Check if the ºDISCº indicator near the disc slot is on.
OK:
It is not on.
NG Press disc switch to eject disc.
OK
DIDCL±01
Page 2431 of 4323
I28257
± DIAGNOSTICSNAVIGATION SYSTEM
DI±2229
2423 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check if a cd is inserted properly.
CHECK:
Check if a CD is inserted properly.
Check whether or not the CD is inserted upside down.
OK:
Not upside down.
NG Set disc correctly.
OK
4 Check CD.
CHECK:
Check for dirt on the CD surface.
OK:
The CD is clean.
HINT:
If dirt is on the CD surface, wipe it with a soft cloth from inside
to outside in a radial direction.
NOTICE:
Do not use conventional record cleaner or anti±static pre-
servative.
NG Clean CD.
OK
Page 2432 of 4323
DI±2230
± DIAGNOSTICSNAVIGATION SYSTEM
2424 Author: Date:
2005 SEQUOIA (RM1146U)
5 Check using another CD.
CHECK:
Check using another CD.
Check if the problem recurs using another CD.
OK:
The problem does not recur.
OK Replace CD.
NG
Proceed to next circuit inspection shown in problem symptoms table (See page DI±2184).