TOYOTA SEQUOIA 2001 Service Repair Manual

I28260
I28261
± DIAGNOSTICSNAVIGATION SYSTEM
DI±2239
2433 Author: Date:
2005 SEQUOIA (RM1146U)
Vehicle position mark deviates greatly
INSPECTION PROCEDURE
1 Check GPS mark.
CHECK:
Check that the GPS mark is displayed.
OK:
The GPS mark is displayed.
NG Go to ºGPS mark is not displayedº in flow chart
(See page DI±2245).
OK
2 Navigation check mode (Vehicle sensors check).
PREPARATION:
Enter the ºNavigation Checkº mode (Vehicle Sensors) (See
page DI±2180).
CHECK:
While driving, compare the ºSPDº indicator to the reading on the
speedometer. Check that these readings are almost the same.
OK:
The readings are almost the same.
NG Go to ºspeed signal circuitº in flow chart
(See page DI±2291).
OK
DIDCW±01

I28262
DI±2240
± DIAGNOSTICSNAVIGATION SYSTEM
2434 Author: Date:
2005 SEQUOIA (RM1146U)
3 Navigation check mode (Vehicle sensors check).
CHECK:
Check the ºREVº display according to the table below.
OK:
Shift leverDisplay
RON
Any position except ROFF
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.
NG Go to ºreverse signal circuitº in flow chart
(See page DI±2294).
OK
Proceed to next circuit inspection shown in problem symptoms table (See page DI±2184).

I28202
± DIAGNOSTICSNAVIGATION SYSTEM
DI±2241
2435 Author: Date:
2005 SEQUOIA (RM1146U)
Cursor or map rotates when vehicle is stopped
INSPECTION PROCEDURE
1 Check condition.
CHECK:
Check with the customer if the vehicle has been turned by a
turntable at parking.
OK:
The vehicle has not been turned by a turntable.
HINT:
If the ignition switch is turned to the ACC or ON position while
the vehicle is being turned by a turntable, the system may store
the angular velocity at this time. For this reason, the vehicle
position cursor could deviate.
NG Turn ignition switch to on position when vehicle
is completely stopped.
OK
Proceed to next circuit inspection shown in problem symptoms table (See page DI±2184).
DIDCX±01

I28258
DI±2242
± DIAGNOSTICSNAVIGATION SYSTEM
2436 Author: Date:
2005 SEQUOIA (RM1146U)
Vehicle position mark is not updated
INSPECTION PROCEDURE
1 Check map disc.
CHECK:
Check that the map disc is not deformed or cracked.
OK:
No deformations or cracks appear on the map disc.
NG Replace map disc.
OK
2 Check map display.
CHECK:
Check if a touch scroll can be performed on the map display.
OK:
Touch scroll can be performed.
NG Proceed to next circuit inspection shown in
problem symptoms table (See page DI±2184).
OK
DIDCY±01

I28261
± DIAGNOSTICSNAVIGATION SYSTEM
DI±2243
2437 Author: Date:
2005 SEQUOIA (RM1146U)
3 Navigation check mode (Vehicle sensors check).
PREPARATION:
Enter the ºNavigation Checkº mode (Vehicle Sensors) (See
page DI±2176).
CHECK:
While driving, compare the ºSPDº indicator to the reading on the
speedometer. Check if these readings are almost the same.
OK:
The readings are almost the same.
NG Go to ºspeed signal circuitº in flow chart
(See page DI±2291).
OK
Proceed to next circuit inspection shown in problem symptoms table (See page DI±2184).

I28263
I28258
DI±2244
± DIAGNOSTICSNAVIGATION SYSTEM
2438 Author: Date:
2005 SEQUOIA (RM1146U)
Current position display does not appear
INSPECTION PROCEDURE
1 Check radio and navigation assy.
CHECK:
Check if a map disc is inserted in the map disc slot.
OK:
A map disc is inserted.
NG Insert map disc in ºMAPº side slot.
OK
2 Check map disc.
CHECK:
Check that the map disc is not deformed or cracked.
OK:
No deformations or cracks appear on the map disc.
NG Replace map disc.
OK
Proceed to next circuit inspection shown in problem symptoms table (See page DI±2184).
DIDD0±01

± DIAGNOSTICSNAVIGATION SYSTEM
DI±2245
2439 Author: Date:
2005 SEQUOIA (RM1146U)
GPS mark is not displayed
INSPECTION PROCEDURE
1 Check cabin.
CHECK:
Check the cabin for any object that might interrupt radio reception on the instrument panel. If such an object
exists, remove it and check if the GPS mark reappears.
HINT:
GPS works using extremely weak radio waves originating from satellites. If the signal is interrupted by ob-
structions or another radio wave, the GPS system may not be able to properly receive the signal.
OK:
Mark appears.
OK Normal operation.
NG
2 Check surroundings.
CHECK:
Check if the vehicle is in a location where GPS signal reception is bad. If the vehicle is in such a place, move
it elsewhere and check if the GPS mark reappears.
HINT:

GPS uses 24 satellites in 6 orbits so that at any time 4 satellites will be in line±of±sight of your vehicle.

GPS signals may not be received, however, based on surroundings, vehicle direction, and time.
DIDD1±01

I28264
In a tunnel In a building Under an overpass
Forest or tree±lined path Between tall buildings Under a cliff, overhang
DI±2246
± DIAGNOSTICSNAVIGATION SYSTEM
2440 Author: Date:
2005 SEQUOIA (RM1146U)

The following illustrations show some conditions where it may be difficult to receive GPS signals.
OK:
GPS mark is displayed.
OK Returns to normal.
NG

I28265
± DIAGNOSTICSNAVIGATION SYSTEM
DI±2247
2441 Author: Date:
2005 SEQUOIA (RM1146U)
3 Navigation check mode (GPS information).
PREPARATION:
Enter the ºNavigation Checkº mode (GPS information) (See
page DI±2180).
CHECK:
Check how many of the following codes occur in the ºSTSº col-
umn.
For DENSO Models: T, P
For AISIN AW Models: 04H, 08H
Standard: At least 3 codes occur.
OK Replace radio and navigation assy.
NG
Proceed to next circuit inspection shown in problem symptoms table (See page DI±2184).

I28266
I28267
DI±2248
± DIAGNOSTICSNAVIGATION SYSTEM
2442 Author: Date:
2005 SEQUOIA (RM1146U)
Voice guidance does not function
INSPECTION PROCEDURE
1 Check navigation system setting.
PREPARATION:
(a) Enter the ºMENUº screen by pressing the ºMENUº switch.
(b) Enter the volume adjustment screen by pressing the ºVol-
umeº switch.
CHECK:
Check that ºOFFº is not selected.
OK:
OFF is not selected.
NG Turn voice guidance volume up to 4 using voice
adjustment switches.
OK
DIDD2±01