TOYOTA SEQUOIA 2001 Service Repair Manual

I28222
± DIAGNOSTICSNAVIGATION SYSTEM
DI±2219
2413 Author: Date:
2005 SEQUOIA (RM1146U)
Touch panel switch does not function
INSPECTION PROCEDURE
1 Check touch panel.
CHECK:
Check for dirt on the display surface.
OK:
The display surface is clean.
NG Remove any dirt found and recheck touch pan-
el.
OK
2 Display check mode (Touch switch check).
PREPARATION:
Enter the ºDisplay Checkº mode (Touch Switch Check) (See
page DI±2176).
CHECK:
Touch the display in the area where the abnormal switch oc-
curs.
OK:
A º+º mark appears at the touched position.
OK Replace radio and navigation assy.
NG
Proceed to next circuit inspection shown in problem symptoms table (See page DI±2184).
DIDCE±01

I28250
DI±2220
± DIAGNOSTICSNAVIGATION SYSTEM
2414 Author: Date:
2005 SEQUOIA (RM1146U)
Display panel does not open, tilt, or tilts improperly
INSPECTION PROCEDURE
1 Check radio and navigation assy.
CHECK:
Check for foreign matter or obstructions caught in the moving
parts of the panel.
OK:
No obstruction or foreign matter is found.
NG Remove any obstruction or foreign matter
found.
OK
2 Operation check.
CHECK:
Check if the navigation and audio systems function properly.
OK:
Navigation and audio systems function properly.
OK Replace radio and navigation assy.
NG
Proceed to next circuit inspection shown in problem symptoms table (See page DI±2184).
DIDCG±01

I28251
I28252
I28253
± DIAGNOSTICSNAVIGATION SYSTEM
DI±2221
2415 Author: Date:
2005 SEQUOIA (RM1146U)
Screen flicker or color distortion
INSPECTION PROCEDURE
1 Check display setting.
PREPARATION:
Enter the display adjustment screen by pressing the ºDISPLAYº
switch.
CHECK:
Reset display settings (contrast, brightness) and
check if the screen appears normal.
OK:
Returns to normal.
PREPARATION:
Press the ºINFOº switch and then the ºScreen Settingº switch.
CHECK:
Set the ºBackground Colorº to ºGreenº (initial setting) and check
if it is normal.
OK:
Returns to normal.
OK End.
NG
DIDCH±01

I28220
DI±2222
± DIAGNOSTICSNAVIGATION SYSTEM
2416 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check cabin.
CHECK:
Check if the cabin temperature is ±20
C (±4.0
F) or less.
OK:
Cabin is warmer than ±20
C (±4.0
F).
NG Heat cabin and recheck temperature.
OK
3 Display check mode (Color bar check mode).
PREPARATION:
Enter the ºDisplay Checkº mode (Color Bar Check Mode) (See
page DI±2176).
CHECK:
Check that color bars match the displayed names.
OK:
Color bars match the displayed names.
NG Replace radio and navigation assy.
OK

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).

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

± 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

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

± 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).

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