2001 TOYOTA SEQUOIA width

IN±42
± INTRODUCTIONTERMS
42 Author: Date:
2005 SEQUOIA (RM1146U) H/B
Hatchback
H±FUSEHigh Current Fuse
HIHigh
HIDHigh Intensity Discharge (Head Lamp)
HSGHousing
HTHard Top
HWSHeated Windshield System
ICIntegrated Circuit
IDIIndirect Diesel Injection
IFSIndependent Front Suspension
IGIgnition
IIAIntegrated Ignition Assembly
INIntake (Manifold, Valve)
INTIntermittent
I/PInstrument Panel
IRSIndependent Rear Suspension
ISCIdle Speed Control
J/BJunction Block
J/CJunction Connector
KDKick±Down
LANLocal Area Network
LBLiftback
LCDLiquid Crystal Display
LEDLight Emitting Diode
LHLeft±Hand
LHDLeft±Hand Drive
L/H/WLength, Height, Width
LLCLong±Life Coolant
LNGLiquified Natural Gas
LOLow
LPGLiquified Petroleum Gas
LSDLimited Slip Differential
LSP & PVLoad Sensing Proportioning And Bypass Valve
LSPVLoad Sensing Proportioning Valve
MAPManifold Absolute Pressure
MAX.Maximum
MICMicrophone
MILMalfunction Indicator Lamp
MIN.Minimum
MG1Motor Generator No.1
MG2Motor Generator No.2
MPMultipurpose
MPIMultipoint Electronic Injection
MPXMultiplex Communication System
M/T, MTMManual Transmission (Transaxle)
MTMount
MTGMounting
NNeutral
NANatural Aspiration
NO.Number
O2SOxygen Sensor
O/DOverdrive

PP0MS±23
PP±70
± PREPARATIONSUPPLEMENTAL RESTRAINT SYSTEM
128 Author: Date:
2005 SEQUOIA (RM1146U)
EQUIPMENT
Torque wrench
Bolt:
Length: 35 mm (1.387 in.)
Pitch: 1.0 mm (0.039 in.)
Diam.: 6.0 mm (0.236 in.)
Airbag disposal
Tire
Width: 185 mm (7.28 in.)
Inner diam.: 360mm (14.17 in.)
Airbag disposal
Tire with disc wheel
Width: 185 mm (7.28 in.)
Inner diam.: 360 mm (14.17 in.)
Airbag disposal
Plastic bagAirbag disposal

PP0SI±02
± PREPARATIONBODY
PP±77
135 Author: Date:
2005 SEQUOIA (RM1146U)
EQUIPMENT
Clip remover
Torque wrench
Hexagon wrench (6 mm)
Torx driver
Hog ring pliers
Hand riveter
TapeTo avoid surface damage
Adhesive tapeTo avoid surface damage
Double±stick tape
Adhesive
Cleaner
Shop rag
Knife
Sealer gun
Brush
Putty spatula
Glass plate or similar object
Wooden block or similar object
Heat light
Piano wire
Rope (no projections, difficult to break)Seat belt pretensioner
Tire with disk wheel Width: 185 mm (7.28 in.)
Inner diam: 360 mm (14.17 in.)Seat belt pretensioner
Vinyl bagSeat belt pretensioner

± SERVICE SPECIFICATIONSENGINE MECHANICAL
SS±5
147 Author: Date:
2005 SEQUOIA (RM1146U) Cylinder head
Warpage Maximum
Valve seat
Refacing angle
Contacting angle
Contacting width
Valve guide bushing bore diameter STD
O/S 0.05
Cylinder head bolt thread inside diameter STD
Minimum
Protrusion heightIntake
Exhaust0.10 mm (0.039 in.)
30°, 45°, 60°
45°
1.0 to 1.4 mm (0.039 to 0.055 in.)
10.285 to 10.306 mm (0.4049 to 0.4057 in.)
10.335 to 10.356 mm (0.4069 to 0.4077 in.)
9.810 to 9.960 mm (0.3862 to 0.3921 in.)
9.700 mm (0.3819 in.)
9.2 to 9.8 mm (0.362 to 0.386 in.)
8.2 to 8.8 mm (0.323 to 0.346 in.)
Valve guide
bushingInside diameter
Outside diameter (for repair part) STD
O/S 0.055.510 to 5.530 mm (0.2169 to 0.2374 in.)
10.333 to 10.344 mm (0.4068 to 0.4072 in.)
10.383 to 10.394 mm (0.4088 to 0.4092 in.)
ValveValve overall length STD Intake
Exhaust
Minimum Intake
Exhaust
Valve face angle
Stem diameterIntake
Exhaust
Stem oil clearance STD Intake
Exhaust
Maximum Intake
Exhaust
Margin thickness STD
Minimum95.05 mm (3.7421 in.)
95.10 mm (3.7441 in.)
94.55 mm (3.7224 in.)
94.60 mm (3.7244 in.)
44.5°
5.470 to 5.485 mm (0.2154 to 0.2159 in.)
5.465 to 5.480 mm (0.2152 to 0.2157 in.)
0.025 to 0.060 mm (0.0010 to 0.0024 in.)
0.030 to 0.065 mm (0.0012 to 0.0026 in.)
0.08 mm (0.0031 in.)
0.10 mm (0.0039 in.)
1.0 mm (0.039 in.)
0.5 mm (0.020 in.)
Valve springDeviation Maximum
Free length
Installed tension at 35.0 mm (1.378 in.)2.0 mm (0.079 in.)
54.1 mm (2.130 in.)
210 to 226 N (21.4 to 23.0 kgf, 47.2 to 50.7 lbf)
Valve lifterLifter diameter
Lifter bore diameter
Oil clearance STD
Maximum30.968 to 30.976 mm (1.2192 to 2.2195 in.)
31.000 to 31.016 mm (1.2205 to 1.2211 in.)
0.024 to 0.050 mm (0.0009 to 0.0020 in.)
0.07 mm (0.0028 in.)
CamshaftThrust clearance STD Intake
Exhaust
Maximum Intake
Exhaust
Journal oil clearance STD
Maximum
Timing tube journal oil clearance STD
Maximum
Journal diameter
Timing tube journal diameter STD
Circle runout
Cam lobe height STD Intake
Exhaust
Minimum Intake
Exhaust
Camshaft gear backlash STD
Maximum
Camshaft gear spring end free distance0 to 0.040 mm (0 to 0.0016 in.)
0.030 to 0.070 mm (0.0011 to 0.0028 in.)
0.12 mm (0.0047 in.)
0.10 mm (0.0039 in.)
0.030 to 0.071 mm (0.0012 to 0.0028 in.)
0.10 mm (0.0039 in.)
0.036 to 0.057 mm (0.0014 to 0.0022 in.)
0.075 mm (0.0030 in.)
26.954 to 26.970 mm (1.0612 to 1.0618 in.)
39.955 to 39.964 mm (1.5730 to 1.5734 in.)
0.03 mm (0.0012 in.)
42.61 to 42.71 mm (1.6776 to 1.6815 in.)
42.63 to 42.71 mm (1.6783 to 1.6823 in.)
42.46 mm (1.6717 in.)
42.48 mm (1.6724 in.)
0.020 to 0.200 mm (0.0008 to 0.0079 in.)
0.30 mm (0.0188 in.)
18.2 to 18.8 mm (0.712 to 0.740 in.)
ManifoldWarpageMaximum Exhaust0.10 mm (0.0039 in.)

A23512
Reference (Bank 1 Sensor 1 System Drawing):
A/F Sensor A/F Relay
Heater
Sensor
A1A+ HA1A
Duty
Control ECM
From
Battery
A/F Heater
Fuse
A1A±
To EFI Relay DI±88
± DIAGNOSTICSENGINE
282 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P0031 Oxygen (A/F) Sensor Heater Control Circuit
Low (Bank 1 Sensor 1)
DTC P0032 Oxygen (A/F) Sensor Heater Control Circuit
High (Bank 1 Sensor 1)
DTC P0051 Oxygen (A/F) Sensor Heater Control Circuit
Low (Bank 2 Sensor 1)
DTC P0052 Oxygen (A/F) Sensor Heater Control Circuit
High (Bank 2 Sensor 1)
HINT:
Although each DTC title (DTC description) says ºoxygen sensorº, these DTCs are related to the ºA/F sensorº.
CIRCUIT DESCRIPTION
Refer to DTC P2195 on page DI±383.
HINT:
The ECM provides a pulse width modulated control circuit to adjust current through the heater. The A/F sen-
sor heater circuit uses a relay on the B+ side of the circuit.
DTC No.DTC Detection ConditionTrouble Area
P0031
P0051Heated current is 0.8 A or less when heater operates
(1 trip detection logic)
Open or short in heater circuit of A/F sensor

A/F sensor heater
P0032
P0052When the heater operates, heated current exceeds 19.7 A
(1 trip detection logic)
A/F sensor heater

A/F sensor heater relay

ECM
DIDFP±01

B17386
Housing
Solid Electrolyte
(Zirconia Element)
Platinum Electrode
Heater
Coating (Ceramic)
Exhaust Gas CoverIdeal Air±Fuel Mixture
Output Voltage
Richer ± Air Fuel Ratio ± Leaner
Atmospheric Air
A21040
Reference(Bank 1 Sensor 1 System Drawing) :
ECM
EFI Relay
EFI Fuse No. 1 From
Battery
GroundOX1A
MREL HT1A
Duty
Control Heater
Sensor Heated Oxygen Sensor
EFI Fuse No. 2
E2 DI±94
± DIAGNOSTICSENGINE
288 Author: Date:
2005 SEQUOIA (RM1146U)
CIRCUIT DESCRIPTION
To obtain a high purification rate for the CO, HC and NOx components of the exhaust gas, a three±way cata-
lytic converter is used, but for the most efficient use of the three±way catalytic converter, the air±fuel ratio
must be precisely controlled so that it is always close to the stoichiometric air±fuel ratio.
The heated oxygen sensor has the characteristic which its output voltage changes suddenly in the vicinity
of the stoichiometric air±fuel ratio. This characteristic is used to detect the oxygen concentration in the ex-
haust gas and provide the ECM with feedback to control the air±fuel ratio.
When the air±fuel ratio becomes LEAN, the oxygen concentration in the exhaust increases and the heated
oxygen sensor informs the ECM of the LEAN condition (low voltage, i.e. less than 0.45 V).
When the air±fuel ratio is RICHER than the stoichiometric air±fuel ratio, the oxygen concentration in the ex-
haust gas is reduced and the heated oxygen sensor informs the ECM of the RICH condition (high voltage,
i.e. more than 0.45 V). The ECM judges by the voltage output from the heated oxygen sensor whether the
air±fuel ratio is RICH or LEAN and controls the injection time accordingly. However, if malfunction of the
heated oxygen sensor causes output of abnormal voltage, this disables the ECM for performing an accurate
air±fuel ratio control. The heated oxygen sensors include a heater which heats the zirconia element. The
heater is controlled by the ECM. When the intake air volume is low (the temperature of the exhaust gas is
low) current flows to the heater to heat the sensor for accurate oxygen concentration detection.
HINT:
The ECM provides a pulse width modulated control circuit to adjust current through the heater. The heated
oxygen sensor heater circuit uses a relay on the B+ side of the circuit.

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.

Z03988
45°30°
1.0 ± 1.4 mm
Z03989
60°45°
1.0 ± 1.4 mm
EM6331
EM0988
Deviation EM±50
± ENGINE MECHANICALCYLINDER HEAD
2629 Author: Date:
2005 SEQUOIA (RM1146U)
(c) Check the valve face and seat for the following:

If blue appears 360° around the face, the valve is
concentric. If not, replace the valve.

If blue appears 360° around the valve seat, the
guide and face are concentric. If not, resurface the
seat.

Check that the seat contact is in the middle of the
valve face with the following width:
1.0 to 1.4 mm (0.039 to 0.055 in.)
If not, correct the valve seats as follows:

If the seating is too high on the valve face, use 30°
and 45° cutters to correct the seat.

If the seating is too low on the valve face, use 60°
and 45° cutters to correct the seat.
(d) Hand±lap the valve and valve seat with an abrasive com-
pound.
(e) After hand±lapping, clean the valve and valve seat.
13. INSPECT VALVE SPRINGS
(a) Using a steel square, measure the deviation of the valve
spring.
Maximum deviation: 2.0 mm (0.079 in.)
If the deviation is greater than maximum, replace the valve
spring.