2001 TOYOTA SEQUOIA gas type

± DIAGNOSTICSENGINE
DI±55
249 Author: Date:
2005 SEQUOIA (RM1146U)DIST DTC CLEAR
Distance after DTC cleared:
Min.: 0 km/h, Max.: 65535 km/hEquivalent to drive distance after
DTCs were erased'
WU CYC DTC CLEARWarm±up cycle after DTC cleared:
Min.: 0, Max.: 255'Number of warm±up cycles after
DTC cleared
MODEL CODEModel code:'Identifying the model code:
UCK30 (2WD), UCK40 (4WD)
ENGINE TYPEEngine type:'Identifying the engine type:
2UZFE
CYLINDER NUMBERCylinder number:
Min.: 0, Max.: 255'Identifying the cylinder number:
8
TRANSMISSIONTransmission type:'Identifying the transmission type:
ECT(5AT)
DESTINATIONDestination'Identifying the destination:
A (America)
MODEL YEARModel year:
Min.: 0, Max.: 255'Identifying the model year:
200#
SYSTEMSystem identification'Identifying the engine system:
GASLIN (gasoline engine)
AI STATUSAI operation prohibit:
OK or NGOK
*1: If no idling conditions are specified, the transmission gear selector lever should be in the N or P position,
and the A/C switch and all accessory switches should be OFF.
2. ACTIVE TEST
HINT:
Performing an ACTIVE TEST enables components including the relays, VSV (Vacuum Switching Valve),
and actuators, to be operated without removing any parts. The ACTIVE TEST can be performed with a
hand±held tester. Performing an ACTIVE TEST as the first step of troubleshooting is one method of shorten-
ing diagnostic time.
DATA LIST can be displayed during ACTIVE TESTs.
(a) Connect a hand±held tester to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the tester ON.
(d) Select the following menu items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST.
(e) Perform the ACTIVE TEST by referring to the table below.
Hand±held Tester DisplaysTest DetailsControl RangesDiagnostic Notes
INJ VOLChange injection volumeBetween ±12 % and 25 %

All injectors tested at the same
time

Perform test at less than 3,000
rpm

Injection volume can be changed
in 1 % graduations within control
range
A/F CONTROLChange injection volumeLower by 12.5 % or increase by 25
%

Perform test at less than 3,000
rpm

A/F CONTROL enables checking
and graphing of A/F (Air Fuel Ra-
tio) sensor and Heated Oxygen
(HO2) sensor voltage outputs

To conduct test, select following
menu items: ACTIVE TEST / A/F
CONTROL / USER DATA / AFS
B1S1 and O2S B1S2, and press
YES and ENTER followed by F4
EVAP VSV (ALONE)Activate EVAP VSV controlON/OFF±

A19885
0.8 mm
(0.031 in.)
DI±194
± DIAGNOSTICSENGINE
388 Author: Date:
2005 SEQUOIA (RM1146U)
5 Check spark plug and spark of misfiring cylinder.
PREPARATION:
(a) Remove the ignition coil assembly.
(b) Remove the spark plug.
CHECK:
(a) Check the electrode for carbon deposits.
(b) Check the spark plug type (See page IG±1).
(c) Check electrode gap.
OK:
No large carbon deposit present.
Not wet with gasoline or oil.
Electrode gap: 0.8 mm (0.031 in.)
NOTICE:
If adjusting the gap of a new spark plug, bend only ºthe
base / groundº electrode. Do not touch the tip. Never at-
tempt to adjust the gap of a used plug.
PREPARATION:
(a) Install the spark plug to the ignition coil assembly.
(b) Disconnect the injector connector.
(c) Ground spark plug.
CHECK:
Check if spark occurs while engine is being cracked.
CAUTION:
Always disconnect each injector connector.
NOTICE:
Do not crank the engine for more than 2 seconds.
OK:
Spark occurs across electrode gap.
OK Go to step 8.
NG

B17424
Monitor Operation Outline
Running
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF Engine
Air pump
ASV
(Electromagnetic Type)
ASV No.2 (Bank 1)
(Vacuum Type)*
System Air Pressure ASV No.2 (Bank 2)
(Vacuum Type)*
AB C D E F
*: ASV No.2 opens alternately per a trip.
± DIAGNOSTICSENGINE
DI±315
509 Author: Date:
2005 SEQUOIA (RM1146U)
MONITOR DESCRIPTION
The ECM detects pressure change with the pressure sensor to determine malfunctioning parts in the system,
and stores the DTCs. The ECM measures pressure and/or exhaust pulsation of the system at 6 points, A
to F, when the air injection system is in operation or when not in operation. When the pressure is high, the
ECM determines the that pump operates. When exhaust pulsation is detected, the ECM determines that the
ASV is open. The ECM determines malfunction parts based on the measured value, and stores the DTCs.
Points A and B:
ECM detects pressure changes (decrease), and determines that the ASV No.2 is open.
Points C and F:
ECM detects pressure and exhaust pulsation, and determines the pressure pattern of the system.
Point D:
ECM operates the system, as indicated by the dashed lines, to determine which of the ASV No.2 is malfunc-
tioning only when pressure changes cannot be detected at point A or B.
Point E:
ECM detects exhaust pulsation to determine the condition of the system.
Pressure condition in Secondary Air Injection System (Point C and F)
Pattern 1:
Air PumpON
Air Switching Valve and Air Switching Valve No.2Open
Pressure1 kPa or more
Pulsation detectionExhaust gas pulsation detected

A23473A±A Cross SectionAtmospheric AirSolid Electrolyte
(Zirconia Element)
Platinum
Electrode Heater
Exhaust Gas
Cover Element
A
A
ECM Monitored
A/F Sensor Voltage
Air±Fuel Ratio Alumina
4.0
3.0
2.0
12 13 14 15 16 17
DI±384
± DIAGNOSTICSENGINE
578 Author: Date:
2005 SEQUOIA (RM1146U)
CIRCUIT DESCRIPTION
The A/F sensor generates a voltage* that corresponds to the actual air±fuel ratio. This sensor voltage is used
to provide the ECM with feedback so that it can control the air±fuel ratio. The ECM determines the deviation
from the stoichiometric air±fuel ratio level, and regulates the fuel injection time. If the A/F sensor malfunc-
tions, the ECM is unable to control the air±fuel ratio accurately.
The A/F sensor is the planar type and is integrated with the heater, which heats the solid electrolyte (zirconia
element). This heater is controlled by the ECM. When the intake air volume is low (the exhaust gas tempera-
ture is low), a current flows into the heater to heat the sensor, in order to facilitate accurate air±fuel ratio
detection. In addition, the sensor and heater portions are narrower than the conventional type. The heat
generated by the heater is conducted to the solid electrolyte though the alumina, therefore the sensor activa-
tion is accelerated.
In order to obtain a high purification rate of the carbon monoxide (CO), hydrocarbon (HC) and nitrogen oxide
(NOx) components in the exhaust gas, a TWC is used. For the most efficient use of the TWC, the air±fuel
ratio must be precisely controlled so that it is always close to the stoichiometric level.
*: Value changes inside the ECM. Since the A/F sensor is the current output element, a current is converted
to a voltage inside the ECM. Any measurements taken at the A/F sensor or ECM connectors will show a
constant voltage.

D14137
Refill Plug
Overflow Plug
D14142Control Shaft Lever
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±525
719 Author: Date:
2005 SEQUOIA (RM1146U)
(h) Remove the overflow plug and check the fluid level.
Standard:
When ATF overflowsATF level is higher than specification
(Go to step (k))
When ATF does not overflow
ATF level is equal to or lower than
specification
(Go to step (i))
HINT:

ºOverflowº indicates the condition under which ATF
drains out from the overflow tube.

The capacity of the overflow tube is approximately 3 cc.
If the amount of drained ATF is little, only the fluid remain-
ing in the tube has drained out. This condition is not con-
sidered as ºoverflowº.
(i) Remove the refill plug.
(j) Add ATF through the refill hole until it flows out from the
overflow hole.
Fluid type: Toyota genuine ATF WS
(k) When the draining ATF has become a trickle, install the
overflow plug with a new gasket.
(l) Install the refill plug if removed.
(m) Lower the vehicle.
(n) Turn the ignition switch off to stop the engine.
2. CHECK FLUID CONDITION
If the fluid smells burnt or is black, replace it (see step 6).
3. INSPECT AND ADJUST SHIFT LEVER POSITION
(a) When shifting the shift lever from the N position to other
positions, check that the lever can be shifted smoothly
and accurately to each position and that the position indi-
cator comes on in accordance with the shift lever position.
If the indicator and shift lever position do not match, carry out
the following adjustment procedures.
(1) Remove the nut and disconnect the shift control
cable from the control shaft lever.
(2) Move the control shaft fully rearward.
(3) Return the control shaft lever 2 notches to the N
position.
(4) Set the shift lever to the N position.
(5) Connect the shift control cable and temporarily
install the control shaft lever nut.
(6) While holding the shift lever lightly toward the R
position side, tighten the control shaft lever nut.
Torque: 14.5 N´m (148 kgf´cm, 11 ft´lbf)

B16499
Fulcrum
Length
30 cm
SST
B02714
CORRECT
WRONG
Delivery Pipe O±Ring
B04939
Delivery
Pipe
Intake
Manifold O±Ring
Grommet
Injector
Insulator
B17532
Quick Type
Disconnect
B11684
Quick Type
Push
Pull
± SFISFI SYSTEM
SF±3
2737 Author: Date:
2005 SEQUOIA (RM1146U)
(3) Using SST, tighten the union bolt to the specified
torque.
SST 09612±24014 (09617±24011)
Torque:
33 N´m (340 kgf´cm, 24 ft´lbf) for use with SST
39 N´m (400 kgf´cm, 29 ft´lbf)
HINT:
Use a torque wrench with a fulcrum length of 30 cm (11.81 in.).
(c) Observe the following precautions when removing or
installing the injectors.
(1) Never reuse the O±ring.
(2) When placing a new O±ring on the injector, take
care not to damage it in any way.
(3) Coat a new O±ring with spindle oil or gasoline be-
fore installing. Never use engine, gear or brake oil.
(d) Install the injector to the delivery pipe and intake manifold
as shown in the illustration.
Before installing the injector, apply spindle oil or gasoline
on the place where the delivery pipe or the intake man-
ifold touches the O±ring of the injector.
(e) Observe the following when disconnecting the fuel tube
connector (quick type):
(1) Check if there is any dirt in the pipe and around the
connector before disconnecting the fuel tube con-
nector. If necessary, clean the dirt away.
(2) Disconnect the fuel pipe clamp from the connector.
(3) Be sure to disconnect them by hand.
(4) When the connector and the pipe are stuck, push
and pull the connector. Then disconnect and pull it
out. Do not use any tools at this time.
(5) Check if there is any dirt or other foreign matter on
the seal surface of the disconnected pipe. If neces-
sary, clean the dirt away.
(6) Do not damage the disconnected pipe and connec-
tor and prevent intrusion of foreign objects by cover-
ing them with a plastic bag.

B17477
Generator Wire
Generator Connector
Generator
Crankshaft PulleyDrive Belt Tensioner
No.1 Timing Belt Cover
Timing Belt
Timing Belt Guide
(Crankshaft Angle Sensor Plate)No.2 Idler Pulley
Timing Belt Cover SpacerGasket
N´m (kgf´cm, ft´lbf) : Specified torque

Non±reusable partWater Inlet Housing
Assembly
Water Pump
O±Ring

Gasket
O±Ring
39 (400, 29)
18 (185, 13)
21 (215, 15)
Wire
Clamp
PS Vane Pump
(100 A Type Generator)
15.5 (158, 11)
39 (400, 29)
34.5 (350, 25)
± COOLINGWATER PUMP
CO±5
2821 Author: Date:
2005 SEQUOIA (RM1146U)

D13866
AT±8
± AUTOMATIC TRANSMISSION (A750E, A750F)ATF TEMPERATURE SENSOR
2916 Author: Date:
2005 SEQUOIA (RM1146U)
7. INSTALL OIL PAN
HINT:
Remove any packing material, and be careful not to spill oil on
the contacting surfaces of the transmission case and the oil
pan.
Using a new gasket, install the oil pan with the 20 bolts.
Torque: 4.4 N´m (45 kgf´cm, 39 in´lbf)
8. FILL WITH ATF AND CHECK ATF LEVEL
(a) Remove the refill plug (See page DI±524).
(b) Fill with new fluid through the refill hole.
Fluid type: Toyota genuine ATF WS