Page 2417 of 4323
± DIAGNOSTICSNAVIGATION SYSTEM
DI±2215
2409 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check cabin.
CHECK:
Check if condensation is likely to occur, or the temperature is high or low (extremely cold) in the cabin.
HINT:
This problem occurs when the cabin is humid and the temperature rapidly changes. This condition may pro-
duce condensation, resulting in a short circuit.
OK:
The above conditions are not observed.
NG Set cabin temperature to appropriate degrees
(20 to 30C) (68 to 86F).
OK
Proceed to next circuit inspection shown in problem symptoms table (See page DI±2184).
Page 2418 of 4323
PKB OFF
REV OFFSPEED 49km/h
TAIL OFF
I28975
DI±2216
± DIAGNOSTICSNAVIGATION SYSTEM
2410 Author: Date:
2005 SEQUOIA (RM1146U)
Illumination for panel switch does not come on with tail switch on
INSPECTION PROCEDURE
1 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).
DIDCA±01
Page 2419 of 4323

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
Page 2420 of 4323
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
Page 2421 of 4323
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
Page 2422 of 4323
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
Page 2423 of 4323
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
Page 2424 of 4323
I28220
DI±2222
± DIAGNOSTICSNAVIGATION SYSTEM
2416 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check cabin.
CHECK:
Check if the cabin temperature is ±20C (±4.0F) or less.
OK:
Cabin is warmer than ±20C (±4.0F).
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