fuel cap TOYOTA AVENSIS 2005 Service Workshop Manual

A91218
ECM Monitor ed
A/F Sens or Voltage
Air−Fuel Ratio
Solid Electrolyte
(Zirconia Element)
Cover Atmosphere
Exhaust Gas Flange
Platinum Electrode
Coating (Ceramic)
Heater
−
DIAGNOSTICS ECD SYSTEM (1CD−FTV)(From September, 2003)
05 −305
AVENSIS Supplement (RM1045E)
DTC P003 1 OXYGEN (A/F) SENSOR HEATER CONTROL
CIRCUIT LOW (BANK 1 SENSOR 1)
HINT:
S For more information on the A/F sensor and TOYOTA D −CAT (*1), see page 05 −255.
S If P0031 is present, refer to the diagnostic trouble codes (DTCs) table for the TOYOTA D −CAT on page
05 −255.
SThis DTC is related to the A/F sensor, although the caption is the oxygen sensor.
*1: Diesel Clean Advanced Technology.
CIRCUIT DESCRIPTION
The A/F sensor has the characteristic that it provides output voltage which is proportional to the existing air −
fuel ratio. The A/F sensor output voltage (*2) is used to provide the ECM with feedback to control the air −fuel
ratio.
The A/F sensor is located after the DPNR (*3) catalytic converter. This sensor has been developed based
on structure and technology of a sensor that is being used for gasoline engines. Its cover portion of the sen-
sor has been changed for application of use to the diesel engine with TOYOTA D −CAT in order to eliminate
influence of the sensor temperature and particulate matter (PM).
In order to reduce both PM and nitrogen oxides (NOx), the ECM adjusts the air −fuel ratio to slightly RICH
(but it is LEAN compared with a stoichiometric air −fuel ratio) with signals from the A/F sensor, if needed.
When the ECM exercises DPNR catalyst regeneration by adding fuel using the exhaust fuel addition injector,
the air −fuel ratio is also properly adjusted through the sensor.
*2: The voltage value changes inside the ECM only.
*3: Diesel Particulate −NOx Reduction system.
05I7J −01

05−484
−
DIAGNOSTICS ECD SYSTEM (1CD −FTV)(From September, 2003)
AVENSIS Supplement (RM 1045E)
DTC P2237 OXYGEN (A/F) SENSOR PUMPING
CURRENT CIRCUIT/OPEN (FOR A/F
SENSOR)(BANK1 SENSOR 1)
DTC P2238 OXYGEN (A/F)SENSOR PUMPING CURRENT CIRCUIT LOW (FOR A/F SENSOR)(BANK 1
SENSOR 1)
DTC P2239 OXYGEN (A/F) SENSOR PUMPING CURRENT CIRCUIT HIGH (FOR A/F
SENSOR)(BANK1 SENSOR 1)
HINT:
S For more information on the A/F sensor and TOYOTA D −CAT (* 1) system, see page 05 −255.
S If P2237, P2238 and/or P2239 is present, refer to the diagnostic trouble codes (DTCs) table for TOYO-
TA D −CAT system on page 05 −255.
S These DTCs are recorded when A/F sensor has malfunction, although the caption is the oxygen sen-
sor.
* 1 : Diesel Clean Advanced Technology.
CIRCUIT DESCRIPTION
Refer to DTC P003 1 on page 05 −305.
DTC No.DTC Detecting ConditionTrouble Area
P2237ECM internal error ( 10 seconds)
( 1 trip detection logic)S ECM
P2238
S A/F sensor circuit low (bank 1 sensor 1)
AF+ is less than 04 V for 50 seconds or more
Main trouble area: Open in A/F sensor circuit
S Open or short in A/F sensor circuit
S A/F sensor
S A/F sensor heaterP2238AF+ is less than 0.4 V for 5.0 seconds or more
( 1 trip detection logic)S A/F sensor heater
S A/F sensor heater relay
S A/F sensor heater and relay circuit
S ECM
P2239
S A/F sensor circuit high (bank 1 sensor 1)
AF+ is more than 44 V for 50 seconds or more
Main trouble area: Short in A/F sensor circuit
S Open or short in A/F sensor circuit
S A/F sensor
S A/F sensor heaterP2239AF+ is more than 4.4 V for 5.0 seconds or more
( 1 trip detection logic)S A/F sensor heater
S A/F sensor heater relay
S A/F sensor heater and relay circuit
S ECM
MONITOR DESCRIPTION
The A/F sensor has a characteristic that it varies its voltage output in proportion to the air −fuel ratio. If imped-
ance (alternating current resistance) or voltage output of the sensor extraordinarily deviates from the stan-
dard range, the ECM interprets this as an open or short malfunction of the A/F sensor circuit.
WIRING DIAGRAM
Refer to DTC P003 1 on page 05 −305.
05I7U −01

100LY−01
A84695
Mass Air Flow
Meter Connector
N·m (kgf·cm, ft·lbf) : Specified torqueEngine Cover Sub−assy
No. 1
9.0 (92, 80 in.
lbf)
VSV
Connector Fuel Vapor Feed
Hose
Clip
Engine Room Cover Side
Radiator Support Opening Cover
Clip
Retainer
x2
x4
1.5 (15, 13 in.
lbf)
Air Cleaner Filter
Element Sub−assy x2
Air Cleaner Cap
Sub−assy
− ENGINE CONTROL SYSTEMKNOCK SENSOR (2AZ−FSE)
10−11
AVENSIS Supplement (RM1045E)
KNOCK SENSOR (2AZ−FSE)
COMPONENTS

A81620
(a)(c)
(c)
(b)
(f)
(g)
(d)
(h)
Air Cleaner Clamp
(e)
A84698
(a)
(b)
(c)
A84699
(d)
(e)
(e)
(e)
(e)
A84700
(f)
(f)
(f)
(f)
− ENGINE CONTROL SYSTEMTHROTTLE BODY ASSY (2AZ−FSE)
10−9
AVENSIS Supplement (RM1045E)
6. REMOVE AIR CLEANER CAP SUB−ASSY
(a) Disconnect the mass air flow meter connector.
(b) Disconnect the VSV connector.
(c) Remove the 2 wiring harness clamps.
(d) Disconnect the ventilation hose.
(e) Disconnect the fuel vapor feed hose No. 1.
(f) Disconnect the fuel vapor feed hose No. 2.
(g) Loosen the hose clamp bolt.
(h) Raise the air cleaner clamp up, then the slide it to the air
cleaner cap.
(i) Remove the air cleaner cap together with the air cleaner
hose No. 1.
(j) Remove the air cleaner filter element.
7. REMOVE THROTTLE BODY ASSY
(a) Disconnect the throttle control motor connector.
(b) Remove the bolt.
(c) Unfasten the clip, then remove the wiring harness protec-
tor.
(d) Remove the bolt, then remove the ground terminal.
(e) Remove the 4 bolts, then remove the throttle body brack-
et.
(f) Remove the 4 bolts, then remove the throttle body.
(g) Remove the gasket from the intake manifold.

100LW−01
A84695
Mass Air Flow
Meter Connector
N·m (kgf·cm, ft·lbf) : Specified torqueEngine Cover Sub−assy
No. 1
9.0 (92, 80 in.
lbf)
VSV
Connector Fuel Vapor Feed
Hose
Clip
Engine Room Cover Side
Radiator Support Opening Cover
Clip
Retainer
x2
x4
1.5 (15, 13 in.
lbf)
Air Cleaner Filter
Element Sub−assy x2
Air Cleaner Cap
Sub−assy 10−6
− ENGINE CONTROL SYSTEMTHROTTLE BODY ASSY (2AZ−FSE)
AVENSIS Supplement (RM1045E)
THROTTLE BODY ASSY (2AZ−FSE)
COMPONENTS

110U9−02
A85741
Air Cleaner Cap w/ Hose
Air Cleaner Element
Air Cleaner Case
7.0 (71, 62 in.
lbf)
N·m (kgf·cm, ft·lbf)
: Specified torque
Radiator Hose Outlet
Clip
Engine Room Cover Side
Clip
Retainer
Radiator Support
Opening Cover
8.0 (82, 71 in.
lbf)
5.5 (56, 49 in.
lbf)
V (Cooler Compressor
to Crankshaft Pulley)
Belt No. 1
Injector Driver
72 (734, 53)
52 (530, 38)52 (530, 38)
Engine Cover
Sub−assy No. 1
Engine Mounting Insulator Sub−assy RH
39 (398, 29)
Power Steering
Idle Pulley Bracket
52 (530, 38)
Clip
Engine Under Cover RH
Engine Under Cover Sub−assy No. 1
Clip
Radiator Reserve Tank Assy
6.0 (61, 53 in.
lbf)
x5
x3
Exhaust Gas Temperature
Sensor Connector
Vacuum Hose
Mass Air Flow Meter
Connector
− FUELINJECTION OR SUPPLY PUMP
ASSY (1CD−FTV)(From September, 2003)11−55
AVENSIS Supplement (RM1045E)
INJECTION OR SUPPLY PUMP ASSY (1CD−FTV)(From
September, 2003)
COMPONENTS

1111 D−01
A93661
(a)
(a)
(b)(b)
(a)
(a)
A85630
11−46
− FUELINJECTOR ASSY (1CD−FTV)(From September, 2003)
AVENSIS Supplement (RM1045E)
REPLACEMENT
NOTICE:
If an incorrect injector compensation code was registered with the ECM, it may rattle the engine as-
sembly or the engine idling may become rough. In addition, it may become a cause of engine failure
or shorten the life of the engine.
HINT:
SIn order to optimize the injector’s fuel injection characteristic, the ECM compensates the injection dura-
tion by each cylinder. The ECM stores and uses compensating data in the form of a 30−digit−alphanu-
meric value that is imprinted on the head portion of each injector as the injector compensation code.
SIf you installed a new injector, its own injector compensation code is needed to register with the ECM.
Also, if you replaced the ECM, the compensation codes of all the injectors are needed to register be-
cause the new ECM does not have the codes until they are registered.
SOnce the ECM is replaced, DTC P1601 will be present when turning the ignition switch to ON. This
is to inform you that the injector compensation codes are required to register with the ECM. In order
to clear the DTC, register the compensation codes first, then turn the ignition switch to OFF and wait
for 30 seconds or longer.
1. REMOVE VACUUM RESERVOIR SUB−ASSY
(a) Disconnect the 2 vacuum hoses and connector.
(b) Remove the 2 bolts and vacuum reservoir.
2. REMOVE RADIATOR SUPPORT OPENING COVER
3. REMOVE ENGINE COVER SUB−ASSY NO.1
(a) Remove the 5 nuts and engine cover.
4. REMOVE AIR CLEANER ASSY
(a) Disconnect the connector.
(b) Remove the air cleaner cap together with the air cleaner hose.
(c) Remove the air cleaner filter element.
(d) Remove the 3 bolts and air cleaner case.
5. REMOVE AIR TUBE NO.1
(a) Remove the 3 bolts and nut, then separate the air tube
No. 1.
(b) Loosen the hose clamp bolts.
6. REMOVE FUEL PIPE NO.3
(a) Remove the fuel pipe insulator.

A79187
O−ring Back−up Ring
A92435
A85760
90_
− FUELINJECTOR ASSY (1CD−FTV)(From September, 2003)
11−49
AVENSIS Supplement (RM1045E)
19. INSTALL INJECTOR ASSY
(a) Install the 4 new nozzle seats to the cylinder head.
(b) Install new back−up rings and O−rings to each injector.
(c) Apply a light coat of engine oil to the O−rings on each in-
jector.
(d) Install the injector to the cylinder head.
NOTICE:
Fit the injectors to the nozzle seat.
(e) Install the nozzle holder clamp as shown in the illustration.
Tighten the camshaft bearing cap bolt by hand to fix the
nozzle holder clamp.
NOTICE:
SPay attention to the mounting orientation of the wash-
er.
SWhen temporarily attaching the nozzle holder clamp
and mounting bolt, be careful not to orient them at an
angle.
HINT:
Apply a light coat of engine oil to the threads of the nozzle hold-
er clamp bolts.
(f) Install the injection pipe No. 1, No. 2, No. 3 and No. 4, then
tighten the nuts by hand.
(g) Install new 4 gaskets and the leakage pipe No. 1. Tighten
the 4 hollow screws by hand.
(h) Tighten the 4 nozzle holder clamp bolts.
Torque: 27 N
m (270 kgf
cm, 20 ft
lbf)
(i) Remove the 4 injection pipes.
20. INSTALL NOZZLE LEAKAGE PIPE ASSY
(a) Install the nozzle leakage pipe and 4 new gaskets.
NOTICE:
When installing the gaskets, pay attention to the mounting
orientation. Install the gasket so that the joint of the gasket
comes within the range shown in the illustration.
(b) Apply a light coat of engine oil to the 4 hollow screws and
the bolt.

110U7−02
A85739
Radiator Support Opening Cover
Engine Cover Sub−assy No. 1
Vacuum Reservoir Sub−assy
Union to Connector Tube Hose
Air Cleaner Cap w/ Hose
Air Cleaner Element
Air Cleaner Case
N·m (kgf·cm, ft·lbf)
: Specified torque
8.0 (82, 71 in.
lbf)
8.3 (85, 73 in.
lbf)
7.0 (71, 62 in.
lbf)
Clip
Retainer
25 (255, 18)
Air Tube No. 1
25 (255, 18)
x5
x2
x3
25 (255, 18)
Mass Air Flow Meter
Connector
6.0 (61, 53 in.
lbf)
6.0 (61, 53 in.
lbf)
11−44
− FUELINJECTOR ASSY (1CD−FTV)(From September, 2003)
AVENSIS Supplement (RM1045E)
INJECTOR ASSY (1CD−FTV)(From September, 2003)
COMPONENTS

1111 5−01
A84695
Mass Air Flow
Meter Connector
N·m (kgf·cm, ft·lbf) : Specified torqueEngine Cover Sub−assy
No. 1
9.0 (92, 80 in.
lbf)
VSV
Connector Fuel Vapor Feed
Hose
Clip
Engine Room Cover Side
Radiator Support Opening Cover
Clip
Retainer
x2
x4
1.5 (15, 13 in.
lbf)
Air Cleaner Filter
Element Sub−assy x2
Air Cleaner Cap
Sub−assy
− FUELFUEL PUMP ASSY (2AZ−FSE)
11−21
AVENSIS Supplement (RM1045E)
FUEL PUMP ASSY (2AZ−FSE)
COMPONENTS