2001 TOYOTA SEQUOIA Page 18

I28248
PKB OFF
REV OFFSPEED 49km/h
TAIL OFF
I28975
± DIAGNOSTICSNAVIGATION SYSTEM
DI±2217
2411 Author: Date:
2005 SEQUOIA (RM1146U)
Display does not dim (Night screen) with tail switch on
INSPECTION PROCEDURE
1 Check image quality setting.
PREPARATION:
(a) Enter the display adjustment screen by pressing the ºDIS-
PLAYº switch.
(b) Turn the light control switch to the TAIL position.
CHECK:
Check if ºDAY MODEº on the display adjustment is ON.
OK:
ºDAY MODEº is ON.
OK Turn forced ºDAY MODEº setting off.
NG
2 Display check mode (Vehicle signal check mode).
PREPARATION:
Enter the ºDisplay Checkº mode (Vehicle Signal Check Mode)
(See page DI±2176).
CHECK:
Turn the light control switch to the TAIL, HEAD or OFF position.
OK:
Light Control SwitchDisplay
TAIL or HEADON
OFFOFF
HINT:
The display is updated once per second. As a result, it is normal
for the display to lag behind the actual change in the switch.
OK Replace radio and navigation assy.
NG
Proceed to next circuit inspection shown in problem symptoms table (See page DI±2184).
DIDCC±01

I28249
DI±2218
± DIAGNOSTICSNAVIGATION SYSTEM
2412 Author: Date:
2005 SEQUOIA (RM1146U)
Panel switch does not function
INSPECTION PROCEDURE
1 Check panel switch.
CHECK:
Check for foreign matter around the switch that might prevent operation.
OK:
No foreign matter is found.
NG Remove any foreign matter found.
OK
2 Display check mode (Panel switch check mode).
PREPARATION:
Enter the ºDisplay Checkº mode (Panel Switch Check Mode)
(See page DI±2176).
CHECK:
Operate the abnormal switch and check if the switch name and
status are correctly displayed.
OK:
The switch name and status are correctly displayed
as operated.
OK Replace radio and navigation assy.
NG
Proceed to next circuit inspection shown in problem symptoms table (See page DI±2184).
DIDCD±01

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

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±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).