2001 TOYOTA AVALON gas type

AX05D-03
AT3785
AT0103
D01019
Q05728
Connector AX-6
- AUTOMATIC TRANSAXLEVALVE BODY ASSEMBLY
1296 Author
: Date
:
2001 AVALON (RM808U)
VALVE BODY ASSEMBLY
ON-VEHICLE REPAIR
1. CLEAN TRANSAXLE EXTERIOR
To help prevent contamination, clean the exterior of the trans-
axle.
2. DRAIN ATF
Using a hexagon wrench, remove the drain plug and drain the
fluid into the suitable container.
3. REMOVE OIL PAN AND GASKET
NOTICE:
Some fluid will remain in the oil pan.
Remove oil pan bolts, and carefully remove the pan assembly.
Discard the gasket.
4. EXAMINE PARTICLES IN PAN
Remove the magnets and use them to collect any steel chips.
Look at the chips and particles in the pan and magnet carefully
to anticipate what type of wear you will find in the transaxle.

Steel (magnetic): bearing, gear and plate wear

Brass (non-magnetic): bushing wear
5. REMOVE OIL STRAINER AND APPLY PIPE BRACKET
(a) Remove the 3 bolts and oil strainer.
NOTICE:
Be careful as oil will come out of the strainer when it is re-
moved.
(b) Remove the 3 bolts and apply pipe bracket.
6. REMOVE OIL PIPE
Pry up both pipe ends with a large screwdriver and remove the
5 pipes.
7. DISCONNECT 3 SOLENOID CONNECTORS

B02101B04941
A06102
1.1 mm
A02024
ON
#10
#20 #40
(+)
#50 #60#30
(-)
- DIAGNOSTICSENGINE
DI-61
217 Author
: Date
:
2001 AVALON (RM808U)
2 Check spark plug and spark of misfiring cylinder.
PREPARATION:
(a) Remove the ignition coil (See page IG-5).
(b) Remove the spark plug.
CHECK:
(a) Check spark plug type.
(b) Check the electrode for carbon deposits.
(c) Check electrode gap.
OK:
(a) Iridium-tipped spark plug
Recommended spark plug:
DENSO made: SK20R11
NGK made: IFR6A11
(b) No large carbon deposit present.
Not wet with gasoline or oil.
(c) Electrode gap: 1.1 mm (0.043 in.)
PREPARATION:
(a) Install the spark plug to the ignition coil, and connect the
ignition coil connector.
(b) Disconnect the injector connector.
(c) Ground the spark plug.
CHECK:
Check if spark occurs while engine is being cranked.
OK:
Spark jumps across electrode gap.
NG Replace or check ignition system (See page
IG-1).
OK
3 Check voltage of ECM terminal for injector of failed cylinder.
PREPARATION:
(a) Remove the glove compartment (See page SF-82).
(b) Turn the ignition switch ON.
CHECK:
Measure the voltage between applicable terminal of the ECM
connector and body ground.
OK:
Voltage: 9 - 14 V

DI07B-20
DI-14
- DIAGNOSTICSENGINE
170 Author
: Date
:
DIAGNOSTIC TROUBLE CODE CHART
HINT:
Parameters listed in the chart may not be exactly the same as your reading due to the type of instrument
or other factors.
If a malfunction code is displayed during the DTC check in check mode, check the circuit for the codes listed
in the table below. For details of each code, turn to the page referred to under the ''See page '' for the respec-
tive ''DTC No.'' in the DTC chart.
SAE CONTROLLED
DTC No.
(See page)Detection ItemTrouble AreaMIL*1Memory
P0100
(DI-23)Mass Air Flow Circuit Malfunc-
tionOpen or short in mass air flow meter circuit
Mass air flow meter
ECM

P0101
(DI-27)Mass Air Flow Circuit Range/
Performance ProblemMass air flow meter
P0110
(DI-28)Intake Air Temp. Circuit Malfunc-
tionOpen or short in intake air temp. sensor circuit
Intake air temp. sensor (built into mass air flow meter)
ECM

P0115
(DI-32)Engine Coolant Temp. Circuit
MalfunctionOpen or short in engine coolant temp. sensor circuit
Engine coolant temp. sensor
ECM

P0116
(DI-36)Engine Coolant Temp. Circuit
Range/Performance ProblemCooling system
Engine coolant temp. sensor
P0120
(DI-38)Throttle/Pedal Position Sensor/
Switch ºAº Circuit MalfunctionOpen or short in throttle position sensor circuit
Throttle position sensor
ECM

P0121
(DI-42)Throttle/Pedal Position Sensor/
Switch ºAº Circuit Range/Perfor-
mance Problem
Throttle position sensor
P0125
(DI-43)Insufficient Coolant Temp. for
Closed Loop Fuel Control
Open or short in A/F sensor (bank 1, 2 sensor 1) circuit
A/F sensor (bank 1, 2 sensor 1)
Air induction system
Fuel pressure
Injector
Gas leakage on exhaust system
ECM

P0128
(DI-48)Thermostat Malfunction
Thermostat
Cooling system
Engine coolant temp. sensor
ECM
P0136
(DI-49)Oxygen Sensor Circuit Malfunc-
tion (Bank 1 Sensor 2)Open or short in heated oxygen sensor circuit
Heated oxygen sensor
P0141
(DI-51)Oxygen Sensor Heater Circuit
Malfunction (Bank 1 Sensor 2)Open or short in heater circuit of heated oxygen sensor
Heated oxygen sensor heater
ECM


A07428
86
5 43 2
1
910
7
117
A09699
8 mm Hexagon Wrench
A09695
Throttle Body
Bracket
Engine
Hanger
EM-68
- ENGINE MECHANICALCYLINDER HEAD
1052 Author
: Date
:
2001 AVALON (RM808U)
26. INSTALL INTAKE MANIFOLD ASSEMBLY
(a) Install the intake manifold, delivery pipe and injectors as-
sembly with the 9 bolts, 2 plate washers and 2 nuts. Uni-
formly tighten the bolts and nuts in several passes and in
the sequence shown.
Torque: 15 N´m (150 kgf´cm, 11 ft´lbf)
(b) Connect the fuel inlet hose to the fuel filter.
CAUTION:
Perform connecting operations of the fuel tube connector
(quick type) after observing the precaution.
(See page SF-1)
(c) Connect the heater hose to the intake manifold.
27. RETIGHTEN WATER OUTLET MOUNTING BOLTS
AND NUTS
Tighten the 2 bolts and 2 nuts.
Torque: 15 N´m (150 kgf´cm, 11 ft´lbf)
28. INSTALL AIR INTAKE CHAMBER ASSEMBLY
(a) Using an 8 mm hexagon wrench, install a new gasket and
the air intake chamber assembly with the 2 bolts and 2
nuts. Uniformly tighten the bolts and nuts in several
passes.
Torque: 43 N´m (440 kgf´cm, 32 ft´lbf)
(b) Install the No.1 engine hanger with the 2 bolts.
Torque: 39 N´m (400 kgf´cm, 29 ft´lbf)
(c) Install the throttle body bracket with the 2 bolts.
Torque: 19.5 N´m (200 kgf´cm, 14 ft´lbf)
(d) Connect the PCV hose to the PCV valve on the RH cylin-
der head.
(e) Connect the ground strap and cable to the intake air con-
trol valve for the ACIS.
(f) Connect the ground cable and strap with the nut.
Torque: 14.5 N´m (145 kgf´cm, 10 ft´lbf)
(g) Connect the ground cable to the air intake chamber.
(h) Connect the brake booster vacuum hose to the throttle
body.
(i) Connect the 2 water bypass hoses to the throttle body.
(j) Connect the air assist hose to the throttle body.
(k) Connect the purge hose to the emission control valve set.
(l) Connect the 2 vacuum hoses to the vacuum tank for
ACIS.
(m) Connect the engine wire clamp to the emission control
valve set.

A07505
(p)
(q)
(r)(o)
(n)
(m)
(n)
A09695
Throttle Body
Bracket
Engine
Hanger
A09699
8 mm Hexagon Wrench
A05074(b) (c)
EM-32
- ENGINE MECHANICALCYLINDER HEAD
1016 Author
: Date
:
2001 AVALON (RM808U)
(m) Disconnect the brake booster vacuum hose from the
throttle body.
(n) Disconnect the 2 water bypass hoses from the throttle
body.
(o) Disconnect the air assist hose from the throttle body.
(p) Disconnect the purge hose from the pipe on the emission
control valve set.
(q) Disconnect the 2 vacuum hoses from the vacuum tank for
the ACIS.
(r) Disconnect the engine wire clamp from the emission con-
trol valve set.
(s) Remove the 2 bolts and No.1 engine hanger.
(t) Remove the 2 bolts and throttle body bracket.
(u) Using an 8 mm hexagon wrench, remove the 2 bolts, 2
nuts, the air intake chamber assembly and gasket.
9. REMOVE INTAKE MANIFOLD ASSEMBLY
(a) Disconnect the 6 injector connectors.
(b) Disconnect the fuel inlet hose from the fuel filter.
CAUTION:
Perform connecting operations of the fuel tube connector
(quick type) after observing the precautions.
(See page SF-1)
(c) Disconnect the heater hose from the intake manifold.

S04497
A07300
- ENGINE MECHANICALENGINE UNIT
EM-79
1063 Author
: Date
:
2001 AVALON (RM808U)
15. CONNECT ENGINE WIRE TO CABIN
(a) Push in the engine wire through the cowl panel. Install the
grommet.
(b) Connect the 5 engine ECM connectors.
(c) Install the glove compartment.
16. CONNECT CONNECTORS, CABLE, CLAMPS AND
HOSES
(a) Connect the noise filter connector on the LH fender
apron.
(b) Connect the generator connector and wire.
(c) Connect the starter connector and wire.
(d) Connect the 2 ground strap connectors to the RH fender
apron
(e) Connect the strap connector to the LH fender apron with
the bolt.
(f) Connect the ground cable to the battery body bracket.
(g) Connect the engine wire protector clamp to the battery
body bracket.
(h) Connect the engine wire clamp to the bracket on the RH
fender apron.
(i) Connect the brake booster vacuum hose to the throttle
body.
(j) Connect the engine coolant reservoir hose to the water
outlet.
(k) Connect the heater hose to the intake manifold.
(l) Connect the heater hose to the water inlet housing.
(m) Connect the fuel inlet hose to the fuel filter.
CAUTION:
Perform connecting operations of the fuel tube connector
(quick type) after observing the precautions.
(See page SF-1)
(n) Connect the EVAP hose assembly to the pipe on the
emission control valve set.
(o) Connect the 2 vacuum hoses to the vacuum tank for the
ACIS.
17. INSTALL FRONT EXHAUST PIPE
(a) Temporarily install 3 new gaskets and the front exhaust
pipe with the 2 bolts, 2 compression springs and 4 nuts.
(b) Tighten the 4 nuts holding the exhaust manifolds to the
front exhaust pipe.
Torque: 62 N´m (630 kgf´cm, 46 ft´lbf)
(c) Tighten the 2 bolts and 2 compression springs holding the
front exhaust pipe to the center exhaust pipe.
Torque: 43 N´m (440 kgf´cm, 32 ft´lbf)

EM0ZR-02
A10836
 Gasket
 Non-reusable part
N´m (kgf´cm, ft´lbf) : Specified torque Gasket
 Bracket
Front Exhaust Pipe Heat Insulator
Center Exhaust Pipe Gasket Heat Insulator
Heated Oxygen Sensor
(Bank 1 Sensor 2)Tailpipe
Ring Ring
33 (330, 24)
Heat Insulator Heated Oxygen Sensor (Bank 1 Sensor 2)

Before installing the oxygen sensor, twist
the sensor wire counterclockwise 3 and
1/2 turns.
If it is twisted, remove the oxygen sensor
and reinstall it.
After installing the sensor wire is not twisted.HINT:
43 (440, 32)
21 (210, 15)
62 (630, 46)
33 (330, 24)
44 (450, 33)
Stay
Pipe Support
Bracket
39 (400, 29)
22 (220,16)
Pipe Support
Bracket
33 (330, 24)
62 (630, 46)
43 (440, 32)
Compression Spring


Compression Spring
Damper
19 (190, 14)
Heat Insulator
No.1 Exhaust Pipe
Support Bracket
Type A
Type B
Ring
Pipe Support
Bracket
EM-1 10
- ENGINE MECHANICALEXHAUST SYSTEM
1094 Author
: Date
:
2001 AVALON (RM808U)
EXHAUST SYSTEM
COMPONENTS

B09076
Fuel Hose
Clamp
B09077
B09078
SST
SST
Retainer
No.1 Fuel
Fuel tube
Connector (Hose)
Pipe
SST
(Hose)SST
- SFIFUEL PUMP
SF-7
111 6 Author
: Date
:
2001 AVALON (RM808U)
(d) Remove the fuel hose clamp.
(e) Disconnect the No.1 fuel pipe (fuel tube connector) from
the fuel filter outlet.
CAUTION:

Perform disconnecting operations of the fuel tube
connector (quick type) after observing the precau-
tions (See page SF-1).

As there is retained pressure in the fuel pipe line, pre-
vent it from splashing inside the engine compart-
ment.
(f) Install SST (pressure gauge) as shown in the illustration
by using SST and fuel tube connector.
SST 09268-41047, 09268-45014
(g) Wipe off any splattered gasoline.
(h) Reconnect the TOYOTA hand-held tester to the DLC3
(See step 1).
(i) Reconnect the negative (-) terminal cable to the battery.
(j) Measure the fuel pressure.
Fuel pressure:
301 - 347 kPa (3.1 - 3.5 kgf/cm
2, 44 - 50 psi)
If pressure is high, replace the fuel pressure regulator.
If pressure is low, check these parts:

Fuel hoses and connections

Fuel pump

Fuel filter

Fuel pressure regulator
(k) Disconnect the TOYOTA hand- held tester from the
DLC3.
(l) Start the engine.
(m) Measure the fuel pressure at idle.
Fuel pressure:
301 - 347 kPa (3.1 - 3.5 kgf/cm
2, 44 - 50 psi)
(n) Stop the engine.
(o) Check that the fuel pressure remains as specified for 5
minutes after the engine has stopped.
Fuel pressure:
147 kPa (1.5 kgf/cm
2, 21 psi) or more
If pressure is not as specified, check the fuel pump, pressure
regulator and/or injectors.