2005 TOYOTA AVENSIS fuel

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DIAGNOSTICS SFI SYSTEM (2AZ−FSE)
05 −1 01
AVENSIS Supplement (RM 1045E)
DTC P0 134 OXYGEN SENSOR CIRCUIT NO ACTIVITY
DETECTED (BANK 1 SENSOR 1)
DTC P0 154 OXYGEN SENSOR CIRCUIT NO ACTIVITY
DETECTED (BANK 2 SENSOR 1)
CIRCUIT DESCRIPTION
Refer to DTC P0 130 on page 05 −82.
DTC No.DTC Detection ConditionTrouble Area
P0 134
P0 154
After engine is warmed up, heated oxygen sensor (sensor 1)
output does not indicate RICH (greater than 0.45 V) even once
when conditions (a), (b), (c), (d) and (e) continue for at least 65
seconds ( 1 trip detection logic):
(a) Engine speed: 1,400 rpm or more
(b) Vehicle speed: 130 km/h (8 1 mph)
(c) Throttle valve is not fully closed
(d) 180 seconds or more after starting engine
(e) Engine coolant temperature is more than 40 _ C( 104 _ F)
S Open or short in heated oxygen sensor circuit
S Heated oxygen sensor (Bank 1, 2 Sensor 1)
S Heated oxygen sensor heater (Bank 1, 2 Sensor 1)
S EFI relay
S Air induction system
S Fuel pressure
S PCV hose connection
S PCV valve and hose
S Injector
S Gas leakage in exhaust system
S ECM
HINT:
S After confirming DTCs P0134 and P0154, confirm the output voltage of the heated oxygen sensor (bank
1, 2 sensor 1) in the DIAGNOSIS / OBD/MOBD / DATA LIST / ALL using the hand−held tester If the
output voltage of the heated oxygen sensor is less than 0.1 V, the heated oxygen sensor circuit may
be open or short.
S Bank 1 refers to the No. 1 and No. 4 cylinders.
SBank 2 refers to the No. 2 and No. 3 cylinders.
SSensor 1refers to the sensor closest to the engine assembly.
WIRING DIAGRAM
Refer to DTC P0 130 on page 05 −82.
05CKB −02

+25 %
−12.5 %
More than 0.5 V
Less than 0.4V
Case1
Case 2
Case 3
Case 4
Output voltage of heated oxygen
sensor (sensor1: front sensor)
Injection volume
Output voltage
Output voltage of heated oxygen
sensor (sensor 2: rear sensor)Main suspect
trouble area
OK
+25 %
−12.5 %
More than 0.5 V
Less than 0.4V
Injection volume
Output voltage
+25 %
−12.5 %
More than 0.5 V
Less than 0.4V
Injection volume
Output voltage
Sensor1: front sensor
(sensor1, heater, sensor1
circuit)+25 %
−12.5 %
More than 0.5 V
Less than 0.4V
Injection volume
Output voltage
+25 %
−12.5 %
Injection volume
Output voltage
NG
+25 %
−12.5 %
Injection volume
Output voltage
NG
+25 %
−12.5 %
Injection volume
Output voltage
NG
+25 %
−12.5 %
Injection volume
Output voltage
NGExtremely rich or lean actual
air−fuel ratio
(Injector, fuel pressure, gas
leakage in exhaust system,
etc.) OK
OK
OK
Almost no reaction


Sensor 2: rear sensor
(sensor 2, heater, sensor 2
circuit)
Almost no reaction Almost no reactionAlmost no reaction
05−102
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM1045E)
INSPECTION PROCEDURE
HINT:
Hand−held tester only:
It is possible the malfunctioning area can be found using the ACTIVE TEST A/F CONTROL operation. The
A/F CONTROL operation can determine if the A/F sensor, heated oxygen sensor or other potential trouble
areas are malfunctioning or not.
(a) Perform the ACTIVE TEST A/F CONTROL operation.
HINT:
The A/F CONTROL operation lowers the injection volume12.5% or increases the injection volume 25%.
(1) Connect the hand−held tester to the DLC3 on the vehicle.
(2) Turn the ignition switch to ON.
(3) Warm up the engine by running the engine at 2,500 rpm for approximately 3 minutes.
(4) Select the item: DIAGNOSIS / OBD/MOBD / ACTIVE TEST / A/F CONTROL.
(5) Perform the A/F CONTROL operation with the engine in an idle condition (press the right or left
button).
Result:
Heated oxygen sensor reacts in accordance with increase and decrease of injection volume:
+25 %
rich output: More than 0.5 V
−12.5 %
lean output: Less than 0.4 V
NOTICE:
There is a delay of few seconds in the sensor1(front sensor) output, and there is about 20 seconds
delay at maximum in the sensor 2 (rear sensor).

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DIAGNOSTICS SFI SYSTEM (2AZ−FSE)
05 −1 03
AVENSIS Supplement (RM 1045E)
The following A/F CONTROL procedure enables the technician to check and graph the voltage outputs of
both the heated oxygen sensor.
To display the graph, enter ACTIVE TEST/ A/F CONTROL/USER DATA, then select ”O2S B 1S 1 and O2S
B 1S2” or ”O2S B2S 1 and O2S B2S2” by pressing the ”YES” button followed by the ”ENTER” button and then
the ”F4” button.
NOTICE:
If the vehicle is short of fuel, the air −fuel ratio becomes LEAN and heated oxygen sensor DTCs will
be recorded, and the CHK ENG then illuminates.
HINT:
S If different DTCs related to different systems that have terminal E2 as the ground terminal are output
simultaneously, terminal E2 may have an open circuit.
S Read freeze frame data using the hand−held tester . Freeze frame data records the engine conditions
when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the
vehicle was running or stopped, if the engine was warmed up or not, if the air −fuel ratio was lean or
rich, and other data from the time the malfunction occurred.
S A high heated oxygen sensor (sensor 1) voltage (0.5 V or more) could be caused by a rich air −fuel
mixture. Check for conditions that would cause the engine to run rich.
S A low heated oxygen sensor (sensor 1) voltage (0.4 V or less) could be caused by a lean air −fuel mix-
ture. Check for conditions that would cause the engine to run lean.
1 CHECK OTHER DTC OUTPUT(IN ADDITION TO DTC P0 134 AND/OR P0 154)
(a) Connect the hand −held tester to the DLC3.
(b) Turn the ignition switch to ON and turn the hand −held tester ON.
(c) Select the item: DIAGNOSIS / OBD/MOBD / DTC INFO / CURRENT CODES.
(d) Read the DTCs using the hand −held tester.
Result:
Display (DTC output)Proceed to
P0 134 and/or P0 154A
P0 134 or P0 154” and other DTCsB
HINT:
SIf any other codes besides P0 134 and/or P0 154 are output, perform troubleshooting for those DTCs
first.
SIf a misfiring DTC(s) is present, record the DTC(s) that indicates misfiring cylinder(s), then proceed to
A.
B GO TO RELEVANT DTC CHART(See page 05 −31)
A

05−1 04
−
DIAGNOSTICS SFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM 1045E)
2 READ VALUE OF HAND −HELD TESTER(OUTPUT VOLTAGE OF HEATED OXYGEN
SENSOR)
(a) Connect the hand −held tester to the DLC3.
(b) Turn the ignition switch to ON and turn the hand −held tester ON.
(c) Warm up the engine to the normal operating temperature above 75 _C( 169 _F).
(d) Read the output voltage of the heated oxygen sensor (sensor 1) when the engine rpm is suddenly in-
creased.
HINT:
Quickly accelerate the engine to 4,000 rpm 3 times using the accelerator pedal.
Standard:
Heated oxygen sensor (sensor 1) outputs a RICH signal (0.45 V or more) at least once.
NG Go to step 6
OK
3 PERFORM CONFIRMATION DRIVING PATTERN (See page 05 −82)
HINT:
Clear all DTCs prior to performing the confirmation driving pattern.
GO
4 READ OUTPUT DTC(SEE IF DTC P0 134 AND/OR P0 154 ARE OUTPUT AGAIN)
(a) Connect the hand −held tester to the DLC3.
(b) Turn the ignition switch to ON and turn the hand −held tester ON.
(c) Enter the following menus: DIAGNOSIS / OBD/MOBD / DTC INFO / CURRENT CODES.
(d) Read the DTC using the hand −held tester.
Result:
Display (DTC output)Proceed to
No outputA
P0 134 and/or P0 154B
B REPLACE ECM (See page 10 − 65 of Pub. No.
RM 1018E AVENSIS)
A
5 CONFIRM IF VEHICLE HAS RUN OUT OF FUEL IN PAST
NO CHECK FOR INTERMITTENT PROBLEMS (See Page 05 −7)
YES
DTC IS CAUSED BY RUNNING OUT OF FUEL (DTC P0 134 AND/OR P0 154)

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DIAGNOSTICS SFI SYSTEM (2AZ−FSE)
05 −1 07
AVENSIS Supplement (RM 1045E)
10 CHECK WHETHER MISFIRE IS OCCURRED OR NOT BY MONITORING DTC AND
DATA LIST
NG PERFORM TROUBLESHOOTING FOR MISFIRE
(See page 05 −1 46)
OK
11 CHECK AIR INDUCTION SYSTEM
(a) Check for vacuum leaks in the air induction system.
NG REPAIR OR REPLACE AIR INDUCTION SYSTEM
OK
1 2 CHECK FUEL PRESSURE(LOW PRESSURE) (See page 11− 4)
NG CHECK AND REPLACE FUEL PUMP,
PRESSURE REGULATOR, FUEL PIPE LINE AND
FILTER
OK
1 3 CHECK FUEL PRESSURE(HIGH PRESSURE) (See page 11− 4)
NG CHECK AND REPLACE FUEL PUMP, FUEL
PRESSURE SENSOR, WIRING AND FUEL
LEAKAGE
OK
1 4 CHECK FOR EXHAUST GAS LEAKS
NG REPAIR OR REPLACE EXHAUST GAS
LEAKAGE POINT (See Page 15− 2)
OK
1 5 CONFIRM IF ANY MISFIRING DTCS WERE PRESENT AT STEP 1
(a) Misfiring DTC P0301, P0302, P0303 and/or P0304 was present at step 1.
NO REPLACE HEATED OXYGEN SENSOR
YES

05−1 08
−
DIAGNOSTICS SFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM 1045E)
16 REPLACE FUEL INJECTOR ASSY (See page 11−1 3)
HINT:
If one or more the misfiring DTCs P030 1, P0302, P0303 and/or P0304 were present at step 1, replace the
injector(s) mounted on the misfiring cylinder(s) that is referred by the DTC(s) with normal injector(s).
GO
17 PERFORM CONFIRMATION DRIVING PATTERN (See page 05 −82)
HINT:
Clear all DTCs prior to performing the confirmation driving pattern.
GO
18 READ OUTPUT DTC(SEE IF DTC P0 134 AND/OR P0 154 ARE OUTPUT AGAIN)
(a) Connect the hand −held tester to the DLC3.
(b) Turn the ignition switch to ON and turn the hand −held tester ON.
(c) Select the item: DIAGNOSIS / OBD/MOBD / DTC INFO / CURRENT CODES.
(d) Read the DTCs using the hand −held tester.
Result:
Display (DTC output)Proceed to
P0 134 and/or P0 154A
No outputB
B REPLACE FUEL INJECTOR ASSY
A
REPLACE HEATED OXYGEN SENSOR

A85516
G and NE Signal Waveforms5V/
Division
G 20 msec./Division (Idling)
NE
A64984Camshaft Position Sensor
C1
Component Side:
05
−384
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DIAGNOSTICS ECD SYSTEM (1CD−FTV)(From September, 2003)
AVENSIS Supplement (RM1045E)
DTC P0340 CAMSHAFT POSITION SENSOR ”A” CIRCUIT (BANK1 OR SINGLE SENSOR)
CIRCUIT DESCRIPTION
Camshaft position sensor (G signal) consists of a magnet, iron core and pickup coil.
The G signal plate has one tooth on its outer circumference and is installed on the camshaft timing pulley.
When the camshafts rotate, the protrusion on the signal plate and the air gap on the pickup coil change,
causing fluctuations in the magnetic field and generating voltage in the pickup coil.
The ECM detects each cylinder position based on a combination of the G signal and a signal from the crank-
shaft position sensor (NE signal).
DTC No.DTC Detection ConditionTrouble Area
No camshaft position sensor si gnal to ECM durin g crankingOpe o sho t i ca shaft positio se so ci c itNo camshaft position sensor signal to ECM during cranking
(2 trip detection logic)S Open or short in camshaft position sensor circuit
S Camshaft position sensorP0340No camshaft position sensor signal to ECM at engine speed of
650 rpm or more
(1 trip detection logic)S Camshaft position sensor
S Camshaft timing pulley
S ECM
Reference: Inspection using the oscilloscope.
During idling the correct waveform is as shown in the diagram
on the left.
Tester ConnectionSpecified Condition
G+ (E12 −23) −G− (E12 −31)Correct waveform is as shown
WIRING DIAGRAM
Refer to DTC P0335 on page 05 −381.
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the hand−held tester. Freeze frame data records the engine conditions when
a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was
running or stopped, if the engine was warmed up or not, if the air −fuel ratio was lean or rich, and other data
from the time the malfunction occurred.
1 INSPECT CAMSHAFT POSITION SENSOR
(a) Disconnect the C1 camshaft position sensor connector.
(b) Measure the resistance between the terminals of the
crankshaft position sensor.
Standard:
Tester ConnectionSpecified Condition
12835 to 1,400
at cold1−21,060 to 1,645
at hot
NOTICE:
”Cold” and ”Hot” shown above mean the temperature of
the coils themselves. ”Cold” is from −10_C( 14 _F) to 50 _C
( 1 22 _F) and ”Hot” is from 50 _C( 122 _F) to 100 _C(2 12_F).
(c) Reconnect the camshaft position sensor.
05B5J −07

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DIAGNOSTICS ECD SYSTEM (1CD−FTV)(From September, 2003)
05 −377
AVENSIS Supplement (RM1045E)
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the hand−held tester. Freeze frame data records the engine conditions when
a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was
running or stopped, if the engine was warmed up or not, if the air −fuel ratio was lean or rich, and other data
from the time the malfunction occurred.
1 CHECK OTHER DTCS OUTPUT(IN ADDITION TO DTC P0234, P0299 AND/OR
P125 1)
(a) Connect the hand −held tester to the DLC3.
(b) Turn the ignition switch to ON and turn the hand −held tester ON.
(c) Select the item ”DIAGNOSIS / OBD/MOBD / DTC INFO / CURRENT CODES”.
(d) Read DTCs. Result:
Display (DTC output)Proceed to
P0234, P0299 and/or P1251A
P0234, P0299 and/or P1251 and other DTCsB
B GO TO RELEVANT DTC CHART (See page 05 −299)
A
2 CONNECTION OF VACUUM HOSES
HINT:
Check the vacuum hoses of turbocharger system connections. NG REPAIR OR REPLACE VACUUM HOSES
OK
3 CHECK VACUUM HOSES(CHECK VACUUM BETWEEN TURBOCHARGER −VRV
FOR TURBO CHARGER)
(a) Using a three −way connector, connect a vacuum gauge to the hoses between the E −VRV and turbo-
charger.
(b) Warm up the engine coolant temperature to above 75 ˚C (167 ˚F).
(c) Check the vacuum at the engine speed of 900 rpm.
Result:
Proceed toVacuum
A0 kPa (0 mmHg, 0 in.Hg) to 50 kPa (375 mmHg, 14.8 in.Hg)
BAbove 50 kPa (375 mmHg, 14.8 in.Hg)
B Go to step 8
A