fuel type TOYOTA SEQUOIA 2001 Service Repair Manual

± INTRODUCTIONTERMS
IN±43
43 Author: Date:
2005 SEQUOIA (RM1146U) OEM
Original Equipment Manufacturing
OHCOverhead Camshaft
OHVOverhead Valve
OPTOption
ORVROn±board Refilling Vapor Recovery
O/SOversize
P & BVProportioning And Bypass Valve
PCSPower Control System
PCVPositive Crankcase Ventilation
PKBParking Brake
PPSProgressive Power Steering
PSPower Steering
PTOPower Take±Off
P/WPower Window
R & PRack And Pinion
RAMRandom Access Memory
R/BRelay Block
RBSRecirculating Ball Type Steering
R/FReinforcement
RFSRigid Front Suspension
RHRight±Hand
RHDRight±Hand Drive
RLYRelay
ROMRead Only Memory
RRRear
RRSRigid Front Suspension
RWDRear±Wheel Drive
SDNSedan
SENSensor
SICSStarting Injection Control System
SOCState Of Charge
SOHCSingle Overhead Camshaft
SPECSpecification
SPISingle Point Injection
SRSSupplemental Restraint System
SSMSpecial Service Materials
SSTSpecial Service Tools
STDStandard
STJCold±Start Fuel Injection
SWSwitch
SYSSystem
T/ATransaxle
TACHTachometer
TBIThrottle Body Electronic Fuel Injection
TCTurbocharger
TCCSTOYOTA Computer±Controlled System
TCVTiming Control Valve
TDCTop Dead Center
TEMP.Temperature
TEMSTOYOTA Electronic Modulated Suspension
TFTTOYOTA Free±Tronic
TISTotal Information System For Vehicle Development

A23510
Vehicle Speed
(64 km/h and 113 km/h)Between
40 mph and 70 mph
Idling
Ignition Switch OFF
10 minutes
Time Warm up
(Note: Even when vehicle stops during driving pattern, test can be resumed)NOTICE:
This test will not be completed
if the vehicle is driven under
absolute constant speed
condition such as with cruise
control activated. (6)
(5) DI±28
± DIAGNOSTICSENGINE
222 Author: Date:
2005 SEQUOIA (RM1146U)
2. CATALYST MONITOR (ACTIVE AIR±FUEL RATIO CONTROL TYPE)
(a) Preconditions
The monitor will not run unless:

The MIL is OFF
(b) Drive Pattern
(1) Connect a hand±held tester or OBD II scan tool to the DLC3.
(2) Turn the ignition switch to ON.
(3) Turn the tester or scan tool ON.
(4) Clear DTCs (where set) (see page DI±43).
(5) Start the engine and warm it up.
(6) Drive the vehicle at between 40 mph and 70 mph (64 km/h and 113 km/h) for at least 10 minutes.
(c) Monitor Status
(1) Check the Readiness Monitor status displayed on the tester or scan tool.
(2) If the status does not switch to COMPL (complete), extend the driving time.

A23544
40 mph (64 km/h)
Idling
IG SW OFF ECT:
75C (167F) or higher
Vehicle Speed
Warming up(5)(6)
10 minutes
or more(7)
10 seconds
or more4 seconds
or moreTime At Least 3 times
(8) (9)
(10) Accelerator Pedal
DepressedAccelerator Pedal
Released (Fuel±cut)
± DIAGNOSTICSENGINE
DI±31
225 Author: Date:
2005 SEQUOIA (RM1146U)
5. AIR±FUEL RATIO (A/F) AND OXYGEN SENSOR (HO2) MONITOR (ACTIVE AIR±FUEL RATIO
CONTROL TYPE)
(a) Preconditions
The monitor will not run unless:

2 minutes or more have elapsed since the engine was started.

The Engine Coolant Temperature (ECT) is 75C (167F) or higher.

Air±fuel ratio feedback control is performed.

Fuel±cut control is performed for 8 seconds or more.
(b) Drive Pattern
(1) Connect the hand±held tester to DLC3.
(2) Turn the ignition switch to ON.
(3) Clear DTCs (see page DI±43).
(4) Start the engine, and warm it up until the ECT reaches 75C (167F) or higher.
(5) Drive the vehicle at 40 mph (64 km/h) or more for at least 10 minutes.
(6) Change the transmission to 2nd gear.
(7) Accelerate the vehicle to 30 mph (48 km/h) or more by depressing the accelerator pedal for at
least 10 seconds.
(8) Soon after performing step (8) above, release the accelerator pedal for at least 4 seconds without
depressing the brake pedal, in order to execute fuel±cut control.
(9) Stop the vehicle and allow the engine to idle for 10 seconds or more.
(10) Allow the vehicle to decelerate until the vehicle speed declines to less than 6 mph (10 km/h).
(11) Repeat steps from (8) through (10) above at least 3 times in one driving cycle.
(c) Monitor Status
(1) Check the Readiness Monitor status displayed on the tester.
(2) If the status does not switch to COMPL (complete), make sure that the preconditions have been
met, and then perform steps from (5) through (11) in Drive Pattern above.

± 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±

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.

± 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

± 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

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.

B11683
Quick Type
Push
B12520
Quick Type
Pull
B17533
Quick Type
Install
B06584
Metallic Type
O±Ring Retainer Pipe
Nylon Tube
Housing
B09688
Metallic Type
SST
SF±4
± SFISFI SYSTEM
2738 Author: Date:
2005 SEQUOIA (RM1146U)
(f) Observe the following when connecting the fuel tube con-
nector (quick type):
(1) Check if there is any damage or foreign objects in
the connected part of the pipe.
(2) Match the axis of the connector with the axis of the
pipe, and push into the connector until a ºclickº
sound is heard. If the connection is tight, apply a
small amount of fresh engine oil on the tip of the
pipe.
(3) After finishing the connection, pull the pipe and the
connector to ensure it is secure.
(4) Check to make sure no fuel leak is present.
If the result is not specified, repair or replace.
(5) Install the fuel pipe clamp to the connector.
(6) Check to make sure no fuel leak is present.
If the result is not specified, repair or replace.
(g) Observe the following when disconnecting the fuel tube
connector (metallic type):
HINT:
The structure of the metallic connector is shown on the left.
(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) Assemble SST to the connecting part, as shown in
the illustration.
SST 09268±21010

B10035
Metallic Type
SST
Insert Retainer
(at 4 places)
B10036
Metallic Type
Pull Connector
B10485
Metallic Type
Push
B10485
Metallic Type
Pull
± SFISFI SYSTEM
SF±5
2739 Author: Date:
2005 SEQUOIA (RM1146U)
(3) Turn the SST, align the retainers inside the connec-
tor with the SST chamfered parts and insert the SST
into the connector.
(4) While holding the SST, pull the connector towards
the SST to put the retainers on the SST chamfered
parts.
(5) Slide the SST and connector together towards the
fuel tube assembly.
(h) Observe the following when connecting the fuel tube con-
nector (metallic type):
(1) Check if there is any damage or foreign objects in
the connected part of the pipe.
(2) Match the axis of the connector with the axis of the
pipe, and push into the connector until a ºclickº
sound is heard. If the connection is tight, apply a
small amount of fresh engine oil on the tip of the
pipe.
(3) After finishing the connection, pull the pipe and the
connector to ensure it is secure.
(4) Check to make sure no fuel leak is present.
If the result is not specified, repair or replace.
(i) Observer the following when handling the nylon tube:
(1) Pay attention not to turn the connected part of the
nylon tube and the quick connector with tube when
connecting them.
(2) Pay attention not to kink the nylon tube.
(3) Do not remove the nylon tube.
(4) Do not close the piping with the nylon tube by bend-
ing it.