TOYOTA SEQUOIA 2001 Service Repair Manual

I28268
I28269
I28258
± DIAGNOSTICSNAVIGATION SYSTEM
DI±2249
2443 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check navigation setting.
PREPARATION:
(a) Enter the ºMENUº screen by pressing the ºMENUº switch.
(b) Enter the ºSetupº screen by pressing the ºSetupº switch.
CHECK:
Check that ºAuto Voice Guidanceº is not OFF.
OK:
Auto voice guidance is not OFF.
CHECK:
Check that ºVoice Guidance in All Modesº is not OFF.
OK:
Voice guidance in all modes is not OFF.
NG Turn auto voice guidance to ºONº.
OK
3 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

DI±2250
± DIAGNOSTICSNAVIGATION SYSTEM
2444 Author: Date:
2005 SEQUOIA (RM1146U)
4 Check radio and navigation assy.
CHECK:
Check if audio sound can be heard from the driver's side speaker.
OK:
Audio sound can be heard.
NG Proceed to next circuit inspection shown in
problem symptoms table (See page DI±2184).
OK
Replace radio and navigation assy.

I28258
± DIAGNOSTICSNAVIGATION SYSTEM
DI±2251
2445 Author: Date:
2005 SEQUOIA (RM1146U)
Map display incomplete
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 display.
CHECK:
Check that displays other than the navigation display are complete.
OK:
No other incomplete displays are found.
NG Replace radio and navigation assy.
OK
Proceed to next circuit inspection shown in problem symptoms table (See page DI±2184).
DIDD4±01

I28258
DI±2252
± DIAGNOSTICSNAVIGATION SYSTEM
2446 Author: Date:
2005 SEQUOIA (RM1146U)
Route cannot be calculated
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 Set destination.
CHECK:
Set another destination and check if the system can calculate the route correctly.
OK:
Route can be correctly calculated.
OK Normal operation.
NG
Proceed to next circuit inspection shown in problem symptoms table (See page DI±2184).
DIDD5±01

I28270
± DIAGNOSTICSNAVIGATION SYSTEM
DI±2253
2447 Author: Date:
2005 SEQUOIA (RM1146U)
Gyro error
INSPECTION PROCEDURE
1 Navigation check mode (Vehicle sensors check).
PREPARATION:
Enter the ºNavigation Checkº mode (Vehicle Sensors) (See
page DI±2180).
CHECK:
Check the gyro voltage.
OK:
0.1 to 4.5 V
NG Replace radio and navigation assy.
OK
Proceed to next circuit inspection shown in diagnostic trouble code chart (See page DI±2184).
DIDD6±01

I28257
I28258
DI±2254
± DIAGNOSTICSNAVIGATION SYSTEM
2448 Author: Date:
2005 SEQUOIA (RM1146U)
Map disc read error
INSPECTION PROCEDURE
1 Check map disc.
CHECK:
Check for dirt on the map disc surface.
OK:
No dirt is on the map disc surface.
HINT:
If dirt is on the map disc 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 map disc.
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 diagnostic trouble code chart (See page DI±2184).
DIDD8±01

I28261
± DIAGNOSTICSNAVIGATION SYSTEM
DI±2255
2449 Author: Date:
2005 SEQUOIA (RM1146U)
Speed signal error
INSPECTION PROCEDURE
1 Navigation check mode (Vehicle sensors check).
CHECK:
(a) Enter the ºNavigation Checkº mode (Vehicle Sensors)
(See page DI±2180).
(b) 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.
OK Replace radio and navigation assy.
NG
Proceed to next circuit inspection shown in diagnostic trouble code chart (See page DI±2203).
DIDD9±01

I28474
11 Radio and
Navigation Assy
ACC
1
20
GND GR 1
RAD No. 24 3 A36
ACC Cut Relay
P
3
1 AM1 ACC12 Sub J/B No. 3
3A
W±R
W±R1
IA1 24
L±Y L±Y
2B
3
2C8
2D1 Engine Room J/B
RAD No. 1
ECU±BShort Pin 1J3
1EW±R
1L1
1C6AM12
ALT
B
Battery
IOBRR30 3A
I18
Ignition SWW±LB 212 1
1C 1FGR
GRB C B±O
J37To ECM
J38
Instrument Panel J/B
1 2B
R30
R30 J/C
PW W±R
B 8
54F10
FL Block DI±2256
± DIAGNOSTICSNAVIGATION SYSTEM
2450 Author: Date:
2005 SEQUOIA (RM1146U)
Power source circuit (Radio and navigation assy)
CIRCUIT DESCRIPTION
This circuit provides power to the radio and navigation assy.
WIRING DIAGRAM
DIDDB±01

I28292
B
GND
ACC
R30
± DIAGNOSTICSNAVIGATION SYSTEM
DI±2257
2451 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Inspect radio and navigation assy (B, ACC, GND).
PREPARATION:
Disconnect the radio and navigation assy connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Symbol
(Tester connection)ConditionSpecified condition
GND (R30±20) ±
Body groundAlwaysBelow 1 W
CHECK:
Measure the voltage according to the value(s) in the table be-
low.
OK:
Symbol
(Tester connection)ConditionSpecified condition
B (R30±1) ±
GND (R30±20)Always10 to 14 V
ACC (R30±11) ±
GND (R30±20)Ignition switch is in ACC10 to 14 V
NG Repair or replace harness or connector.
OK
Proceed to next circuit inspection shown in problem symptoms table or diagnostic trouble code
chart (See page DI±2203 or DI±2184).

I28475
GR 1
4 3 A36
ACC Cut Relay
12 Sub J/B No. 3
3AW±R 1
2 3A
GRB C B±O
J37To ECM
J38
RAD No. 2
3
1 6AM1 212 1Instrument Panel J/B
1 2
P
3AM1
ACC W±R
W±L
ALT
B
Battery W±RIL12
L±W
2A
2C8
2D1 Engine Room J/B
RAD No. 3
ECU±BShort Pin 3
B B
BBJ11
J10 J11 L±W
IOBR
BRS10
S9
S9S9
S9 12
10
15
161ACC
B2+
B+
GND
E Stereo Component
Amplifier Assy
1J 1E
1L 1C 1C 1FJ/C
J/C
B
1GR
L±W
L±W
W±R
I18
Ignition SW P
W
8
4
5F10
FL Block DI±2258
± DIAGNOSTICSNAVIGATION SYSTEM
2452 Author: Date:
2005 SEQUOIA (RM1146U)
Power source circuit (Stereo component amplifier assy)
CIRCUIT DESCRIPTION
This circuit provides power to the stereo component amplifier assy.
WIRING DIAGRAM
DIDDD±01