2001 TOYOTA SEQUOIA Page 18

DI±2230
± DIAGNOSTICSNAVIGATION SYSTEM
2424 Author: Date:
2005 SEQUOIA (RM1146U)
5 Check using another CD.
CHECK:
Check using another CD.
Check if the problem recurs using another CD.
OK:
The problem does not recur.
OK Replace CD.
NG
Proceed to next circuit inspection shown in problem symptoms table (See page DI±2184).

I28256
I28258
± DIAGNOSTICSNAVIGATION SYSTEM
DI±2231
2425 Author: Date:
2005 SEQUOIA (RM1146U)
CD cannot be ejected
INSPECTION PROCEDURE
1 Check radio and navigation assy.
PREPARATION:
Turn the ignition switch to the ACC position.
CHECK:
Keep pressing the ºDISCº eject switch for 5 seconds and check
if the disc is ejected by forced ejection.
OK:
The disc is ejected.
HINT:
The above operation can only be performed with the ignition
switch in the ACC position.
NG Proceed to next circuit inspection shown in
problem symptoms table (See page DI±2184).
OK
2 Check the CD.
CHECK:
Check that the CD is not deformed or cracked.
OK:
No deformations or cracks appear on the CD.
NG Replace CD.
OK
DIDCM±01

± DIAGNOSTICSNAVIGATION SYSTEM
DI±2233
2427 Author: Date:
2005 SEQUOIA (RM1146U)
Abnormal noise occurs
INSPECTION PROCEDURE
1 Check speaker installation
CHECK:
Check if each speaker is securely installed.
OK:
Each speaker is securely installed.
HINT:
The radio is equipped with a noise prevention system that blocks only excessively loud noise. If loud noise
occurs, check that all wiring is proper and that the antenna installation part ground and noise±prevention
equipment are installed.
Conditions under which noise occursNoise type
Noise increases when the accelerator pedal is depressed, but stops when
the engine is stopped.Generator noise
Noise occurs during A/C or heater operation.Blower motor noise
Noise occurs when the vehicle accelerates rapidly on an unpaved road or
after the ignition switch is turned on.Fuel pump noise
Noise occurs when the horn switch is pressed and released or when pressed
and held.Horn noise
Quiet noise is occurs while the engine is running, but stops when the engine
is stopped.Ignition noise
Noise occurs synchronously with the blink of the turn signal.Flasher noise
Noise occurs during window washer operation.Washer noise
Noise occurs while the engine is running, and continues even after the engine
is stopped.Water temperature sensor noise
Noise occurs during wiper operation.Wiper noise
Noise occurs when the brake pedal is depressed.Stop light switch noise
Others.Static electricity stored on the vehicle
HINT:

Identify the condition under which the noise occurs, and check the noise filter on the relevant part.

First ensure that the noise is not coming from outside. Failure to do so makes noise source detection
difficult and may lead to a misdiagnosis.

Noise should be removed in descending order of loudness.
NG Install it properly.
OK
Identification of noise source (See page DI±2174).
DIDCO±01

± DIAGNOSTICSNAVIGATION SYSTEM
DI±2235
2429 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check using another CD.
CHECK:
Check if the problem recurs using another CD.
OK:
The problem does not recur.
OK Replace CD.
NG
4 Check radio and navigation assy.
CHECK:
Check that the radio and navigation assy is properly installed.
OK:
Radio and navigation assy is properly installed.
NG Reinstall radio and navigation assy properly.
OK
Proceed to next circuit inspection shown in problem symptoms table (See page DI±2184).

I28259
DI±2236
± DIAGNOSTICSNAVIGATION SYSTEM
2430 Author: Date:
2005 SEQUOIA (RM1146U)
Poor sound quality in all modes (Low volume)
INSPECTION PROCEDURE
1 Check audio settings.
PREPARATION:
Enter the sound adjustment screen by pressing the ºSOUNDº
switch on the AUDIO display.
CHECK:
Set ºBASSº and ºTREBº to the initial values and check if sound
is normal.
OK:
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).
DIDCR±01

I28258
I28883
± DIAGNOSTICSNAVIGATION SYSTEM
DI±2237
2431 Author: Date:
2005 SEQUOIA (RM1146U)
Map disc cannot be inserted
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 Check map disc.
OK
2 Check radio and navigation assy.
CHECK:
Check if the ºMAPº indicator near the disc slot is on.
OK:
It is not on.
NG Press eject switch to eject disc.
OK
Proceed to next circuit inspection shown in problem symptoms table (See page DI±2184).
DIDCT±01

I28883
I28258
DI±2238
± DIAGNOSTICSNAVIGATION SYSTEM
2432 Author: Date:
2005 SEQUOIA (RM1146U)
Map disc cannot be ejected
INSPECTION PROCEDURE
1 Check radio and navigation assy.
PREPARATION:
Turn the ignition switch to the ACC position.
CHECK:
Keep pressing the ºMAPº eject switch for 5 seconds and check
if the disc is ejected by forced ejection.
OK:
The disc is ejected.
HINT:
The above operation can only be performed with the ignition
switch in the ACC position.
NG Proceed to next circuit inspection shown in
problem symptoms table (See page DI±2184).
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
Normal operation.
DIDCU±01

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