check engine light TOYOTA SEQUOIA 2001 Service Service Manual

± DIAGNOSTICSAUDIO SYSTEM
DI±2027
2221 Author: Date:
2005 SEQUOIA (RM1146U)
Noise occurs
INSPECTION PROCEDURE
1 Check of 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 excessively loud noise. If such noise oc-
curs, check the all wiring is proper and that the antenna installation part ground and noise±prevention equip-
ment are installed.
Condition in 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 the 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 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 it continues even after the en-
gine 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 related part.

First ensure that the noise is not coming from the outside. Failure to do so makes noise source detec-
tion 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±1964).
DIDA3±01

DIDC5±01
I28205
I28206
Upper Left
Lower Left
I28207
± DIAGNOSTICSNAVIGATION SYSTEM
DI±2191
2385 Author: Date:
2005 SEQUOIA (RM1146U)
DIAGNOSIS SYSTEM
HINT:

Illustrations may differ from the actual vehicle depending on the device settings and options. There-
fore, some detailed areas may not be shown exactly the same as on the actual vehicle.

After the ignition switch is turned on, check that the map is displayed before starting the diagnostic
mode. Otherwise, some items cannot be checked.
1. There are 2 methods to start diagnostic mode. Start the mode by using one of them.
2. Method 1
(a) Start the engine.
(b) While pressing and holding ºINFOº switch, operate the
light control switch, OFF " TAIL " OFF " TAIL " OFF
" TAIL " OFF.
(c) The diagnostic mode starts and the service check screen
(ºSystem Check Modeº) will be displayed. Service inspec-
tion starts automatically and the result will be displayed.
3. Method 2
(a) Start the engine.
(b) Switch to the ºDisplay quality adjustmentº screen.
(c) From the display quality adjustment screen, touch the
corners of the screen in the following order: upper left "
lower left "upper left " lower left " upper left " lower
left.
(d) The diagnostic mode starts and ºService Checkº screen
will be displayed. Service inspection starts automatically
and the result will be displayed.
4. Diagnosis MENU
(a) Diagnostic screen will be displayed by pressing the menu
switch on the service check screen.

± 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

DI±2318
± DIAGNOSTICSAIR CONDITIONING SYSTEM
2512 Author: Date:
2005 SEQUOIA (RM1146U)31
(DI±2346)
Front air mix damper position sensor
circuit
Front air mix damper position sensor

Harness or connector between front air mix damper position
sensor and integration control and panel

Integration control and panel

(1 min. or more)
32
(DI±2349)
Air inlet damper position sensor circuit
Air inlet damper position sensor

Harness or connector between air inlet damper position
sensor and integration control and panel

Integration control and panel

(1 min. or more)
37
(DI±2352)
Water valve damper position sensor cir-
cuit
Water valve damper position sensor

Harness or connector between water valve damper position
sensor and integration control and panel

Integration control and panel

(1 min. or more)
41
(DI±2355)
Front air mix damper control servomotor
circuit
Front air mix damper control servomotor

Front air mix damper position sensor

Harness or connector between integration control and panel
and front air mix damper control servomotor

Harness or connector between air mix position sensor and
integration control and panel front

Integration control and panel

(15 sec. or more)
42
(DI±2358)
Air inlet damper control servomotor cir-
cuit
Air inlet damper control servomotor

Air inlet damper position sensor

Harness or connector between air inlet damper control ser-
vomotor and integration control and panel

Harness or connector between air inlet damper position
sensor and integration control and panel

Integration control and panel

(15 sec. or more)
47
(DI±2361)
Water valve damper control servomotor
circuit
Water valve damper control servomotor

Water valve damper position sensor

Harness or connector between water valve damper control
servomotor and integration control and panel

Harness or connector between water valve damper position
sensor and integration control and panel

Integration control and panel

(15 sec. or more)
HINT:

*1 If the room temp. is approx. ±20°C (±4°F) or lower, this DTC may be output even though the system
is normal.

*2
If the ambient temp. is approx. ±50°C (±58°F) or lower, DTC 12 may be output even though the sys-
tem is normal.

*3
If the check is being performed in a dark place, DTC 21 (solar sensor circuit abnormal) could be dis-
played. In this case, perform DTC check again while illuminating the solar sensor with an inspection
light etc.. If DTC 21 is still displayed, there could be trouble in the solar sensor circuit.

*4
Compressor lock (DTC 22) is indicated only for a current malfunction. (See page DI±2339)
To confirm DTC 22, preform the following steps.
(1) With the engine ON, enter the DTC check mode.
(2) Press the R/F switch to enter actuator check mode, and set the operation to Step No. 3.
(3) Press the AUTO switch to return to DTC check mode.
(4) The DTC is displayed after approx. 3 sec.

A04459
EM±10
± ENGINE MECHANICALIGNITION TIMING
2589 Author: Date:
2005 SEQUOIA (RM1146U)
(3) Using a timing light, check the ignition timing.
Ignition timing: 5 to 15° BTDC at idle
(Transmission in neutral)
(4) Remove the SST from the DLC3.
SST 09843±18040
(5) Disconnect the timing light from the engine.

EM0181
Margin Thickness
EM2534
Overall Length
EM0255
EM6330
45° Carbide Cutter
Z00055
Width
± ENGINE MECHANICALCYLINDER HEAD
EM±49
2628 Author: Date:
2005 SEQUOIA (RM1146U)
(c) Check the valve head margin thickness.
Standard margin thickness: 1.0 mm (0.039 in.)
Minimum margin thickness: 0.5 mm (0.020 in.)
If the margin thickness is less than minimum, replace the valve.
(d) Check the valve overall length.
Standard overall length:
Intake95.05 mm (3.7421 in.)
Exhaust95.10 mm (3.7441 in.)
Minimum overall length:
Intake94.55 mm (3.7224 in.)
Exhaust94.60 mm (3.7244 in.)
If the overall length is less than minimum, replace the valve.
(e) Check the surface of the valve stem tip for wear.
If the valve stem tip is worn, resurface the tip with a grinder or
replace the valve.
NOTICE:
Do not grind off more than minimum.
12. INSPECT AND CLEAN VALVE SEATS
(a) Using a 45° carbide cutter, resurface the valve seats. Re-
move only metal enough to clean the seats.
(b) Check the valve seating position.
Apply a light coat of Prussian blue (or white lead) to the
valve face. Lightly press the valve against the seat. Do not
rotate the valve.

A05712SST
A07306
Vinyl Tape
± ENGINE MECHANICALCYLINDER HEAD
EM±59
2638 Author: Date:
2005 SEQUOIA (RM1146U)
(c) Using SST, compress the valve spring and place the 2
keepers around the valve stem.
SST 09202±70020 (09202±00010)
(d) Using a plastic±faced hammer and the valve stem (not in
use) tip wound with vinyl tape, lightly tap the valve stem
tip to assure proper fit.
NOTICE:
Be careful not to damage the valve stem tip.
3. INSTALL SHIMS AND VALVE LIFTERS
(a) Install the shim and valve lifter.
(b) Check that the valve lifter rotates smoothly by hand.

A23340
A
B
C
E
EA
B C
EE
E
EE
EE D
E EEE
ED
A23340
1
4
22
82
3 21
6
57
13 141912
11
15
1620
9
1017
18
A23338
Service Bolt
EM7143
Seal Packing
± ENGINE MECHANICALCYLINDER HEAD
EM±69
2648 Author: Date:
2005 SEQUOIA (RM1146U)
(11) Install 4 new seal washers to the bearing cap bolts
(A and B).
(12) Apply a light coat of engine oil on the threads and
under the heads of the bearing cap bolts (D and E).
NOTICE:
Do not apply engine oil under the heads of the bearing cap
bolts (A), (B) and (C).
HINT:
Each bolt length is indicated in the illustration.
Bolt length:
94 mm (3.70 in.) for A with seal washer
72 mm (2.83 in.) for B with seal washer
25 mm (0.98 in.) for C
52 mm (2.05 in.) for D
38 mm (1.50 in.) for E
(13) Install the oil feed pipe and the 22 bearing cap bolts
as shown in the illustration.
(14) Uniformly tighten the 22 bearing cap bolts in several
steps, in the sequence shown.
Torque:
7.5 N´m (76 kgf´cm, 66 in.´lbf) for bolt C
16 N´m (160 kgf´cm, 12 ft´lbf) for others
(15) Remove the service bolt.
9. CHECK AND ADJUST VALVE CLEARANCE
(See page EM±4)
Turn the camshaft so that the cam lobe faces upward, and
check and adjust the valve clearance.
10. INSTALL CAMSHAFT TIMING OIL CONTROL VALVE
(See page SF±48)
11. INSTALL SEMI±CIRCULAR PLUGS
(a) Remove any old packing material (FIPG).
(b) Apply seal packing to the semi±circular plug grooves.
Seal packing:
Part No. 08826±00080 or equivalent

A05095
1
248
6
3
5
9
7
10
A05094
Front
Painted
Mark90° 90°
A23371
Front Mark
(1 Cavity)
Front
LH
Piston
RH
PistonFront
Front Mark
(2 Cavities)
EM±122
± ENGINE MECHANICALCYLINDER BLOCK
2701 Author: Date:
2005 SEQUOIA (RM1146U)
(a) Apply a light coat of engine oil to the threads and under
the main bearing cap bolts.
(b) Install and uniformly tighten the 10 main bearing cap bolts
in several steps, in the sequence shown.
Torque: 27 N´m (275 kgf´cm, 20 ft´lbf)
If any of the main bearing cap bolts does not meet the torque
specification, replace the main bearing cap bolt.
(c) Mark the front of the main bearing cap bolt with paint.
(d) Retighten the main bearing cap bolts by 90° in the numer-
ical order shown.
(e) Check that the painted mark is now at a 90° angle to the
front.
(f) Check that the crankshaft turns smoothly.
9. CHECK CRANKSHAFT THRUST CLEARANCE
(See page EM±101)
10. INSTALL PISTON AND CONNECTING ROD AS-
SEMBLIES
Using a piston ring compressor, push correctly the numbered
piston and connecting rod assemblies into each cylinder with
the front mark of the piston facing forward.
NOTICE:
The shape of the piston differs for the LH and RH banks.
The LH piston is marked with 1 cavity and º2º, the RH pis-
ton with 2 cavities and º2º.

A05106
A05107A05108A05174
Front
Outside Mark
(Protrusion)
RH Bank LH Bank
Front
Outside Mark
(Protrusion)
A05101
A05099
Painted
Mark Front90°
90°
± ENGINE MECHANICALCYLINDER BLOCK
EM±123
2702 Author: Date:
2005 SEQUOIA (RM1146U)
11. PLACE CONNECTING ROD CAP ON CONNECTING
ROD
(a) Match the numbered connecting rod cap with the con-
necting rod.
(b) Align the pin groove of the connecting rod cap with the
pins of the connecting rod, and install the connecting rod
cap.
(c) Check that the outside mark of the connecting rod cap is
facing in correct direction.
12. INSTALL CONNECTING ROD CAP BOLTS
HINT:

The connecting rod cap bolts are tightened in 2 progres-
sive steps (steps (b) and (d)).

If any one of the connecting rod cap bolts is broken or de-
formed, replace it.
(a) Apply a light coat of engine oil on the threads and under
the heads of the connecting rod cap bolts.
(b) Install and alternately tighten the 2 connecting rod cap
bolts in several passes.
Torque: 24.5 N´m (250 kgf´cm, 18 ft´lbf)
If any one of the connecting rod cap bolts does not meet the
torque specification, replace the connecting rod cap bolts.
(c) Mark the front of the connecting cap bolt with paint.
(d) Retighten the cap bolts by 90° as shown.
(e) Check that the painted mark is now at a 90° angle to the
front.
(f) Check that the crankshaft turns smoothly.
13. CHECK CONNECTING ROD THRUST CLEARANCE
(See page EM±101)