2005 TOYOTA AVENSIS fuel

05±158
± DIAGNOSTICSSFI SYSTEM (1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)THROTTLE POS
Throttle position sensor output
voltage/
Min.: 0 V, Max.: 5 V
Throttle fully closed: 0.3 to 0.8 V

Throttle fully open: 3.2 to 4.9 VRead the value with ignition switch
ON (Do not start engine)
THROTTLE TARGTTarget position of throttle valve/
Min.: 0 V, Max.: 5 VIdling: 0.4 to 1.0 VRead the value with ignition switch
ON (Do not start engine)
If no conditions are specifically stated for ºldlingº, it means the shift lever is at N or P position, the A/C switch
is OFF and all accessory switches are OFF.
7. ACTIVE TEST
HINT:
Performing the ACTIVE TEST using the hand±held tester allows the relay, VSV, actuator and so on to oper-
ate without parts removal. Performing the ACTIVE TEST as a first step of troubleshooting is one of the meth-
od to shorten diagnostic time.
It is possible to display the DATA LIST during the ACTIVE TEST.
(a) Warm up the engine.
(b) Turn the ignition switch OFF.
(c) Connect the hand±held tester to the DLC3.
(d) Turn the ignition switch ON.
(e) Push the ºONº button of the hand±held tester.
(f) Select the item ºDIAGNOSIS / OBD/MOBD / ACTIVE TESTº.
(g) According to the display on tester, perform the ºACTIVE TESTº.
Hand±held Tester DisplayTest DetailsDiagnostic Note
INJ VOL
[Test Details]
Control the injection volume
Min.: ±12.5 %, Max.: 25 %
[Vehicle Condition]
Engine speed: 3000 rpm or less.
All injectors are tested at once.

Injection volume is gradually
changed between ±12.5 and
25%.
A/F CONTROL
[Test Details]
Control the injection volume
±12.5 %  25 % (Change the injection volume ±12.5 % or 25 %.)
[Vehicle Condition]
Engine speed: 3000 rpm or less.
The following procedure of A/F
CONTROL enables the technician
to check and graph the voltage
outputs of both the A/F sensor and
heated oxygen sensor.
To display the graph indication, se-
lect O2S B1 S1 or A/F B1S1 and
press button º4º after selecting
ºACTIVE TEST/A/F CONTROL/
USER DATAº.
EVAP VSV (ALONE)
[Test Details]
Activate the VSV for EVAP control.
ON or OFF


FUEL PUMP / SPD
[Test Details]
Control the fuel pump.
ON or OFF


VVT CTRL B1
[Test Details]
Activate the VVT system.
ON or OFF
ON: Rough idle or engine stall.

OFF: Normal engine speed.
TC/TE1
[Test Details]
Connect the TC and TE1
ON or OFF


FC IDL PROHBT
[Test Details]
Control the idle fuel cut prohibit
ON or OFF

05±160
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
6CHECK FUEL PRESSURE (See page 11±19)
NGPROCEED TO PAGE 11±15 AND CONTINUE TO TROUBLESHOOT
OK
7CHECK FOR SPARK (See page 18±7)
NGPROCEED TO PAGE 18±7 AND CONTINUE TO TROUBLESHOOT
OK
PROCEED TO PROBLEM SYMPTOMS TABLE ON PAGE

05±122
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
DTCP1656OCV CIRCUIT MALFUNCTION (BANK 1)
CIRCUIT DESCRIPTION
Refer to DTC P1349 on page 05±112.
DTC No.DTC Detecting ConditionTrouble Area
P1656Open or short in oil control valve (OCV) circuit

Open or short in OCV circuit

OCV

ECM
WIRING DIAGRAM
Refer to DTC P1349 on page 05±112.
INSPECTION PROCEDURE
HINT:
Read freeze frame data using \f \b\f\f
 Freeze frame data records the engine conditions when
a malfunction is detected. When troubleshooting, it is useful for determi\
ning whether the vehicle was running
or stopped, the engine was warmed up or not, the air±fuel ratio was lea\
n or rich, etc. at the time of the mal-
function.
1PERFORM ACTIVE TEST BY HAND±HELD TESTER(OCV OPERATION)
(a)Start the engine and warm it up.
(b)Connect the hand±held tester and select the VVT on the ACTIVE TEST me\
nu.
(c)Check the engine speed while operating the OCV by using the hand±held\
tester. Result:
VVT system is OFF (OCV is OFF): Normal engine speed
VVT system is ON (OCV is ON): Rough idle or engine stalled
OKCHECK FOR INTERMITTENT PROBLEMS(See page 05±5)
NG
2INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSY (See page 10±3)
NG REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSY
OK
3INSPECT ECM(CHECK VOLTAGE) (See page 05±20)
NG CHECK AND REPLACE ECM (See page 01±32)
OK
05B4A±02

A63955
GND
CH1
(G2+)
CH2
(NE+) GND
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
05±229
AVENSIS REPAIR MANUAL (RM1018E)
DTCP0340/12CAMSHAFT POSITION SENSOR ºAº
CIRCUIT (BANK 1 OR SINGLE SENSOR)
DTCP0341/12CAMSHAFT POSITION SENSOR ºAº CIRCUIT RANGE/PERFORMANCE (BANK 1
OR SINGLE SENSOR)
CIRCUIT DESCRIPTION
The camshaft position sensor (G signal) consists of a magnet, iron core a\
nd pickup coil.
The G signal rotor has 3 teeth on its outer circumference and is install\
ed on the intake camshaft.
When the camshafts rotate, the protrusion on the signal plate and the air gap on the pickup coil changes,
causing fluctuations in the magnetic field and generating an electromoti\
ve force in the pickup coil.
The NE signal plate (crankshaft position sensor plate) has 34 teeth an\
d is installed to the crankshaft. The
NE signal sensor generates 34 signals at every engine revolution. The EC\
M detects the crankshaft angle
and the engine revolution based on the NE signals, and the cylinder and the\
angle of the VVT based on the
combination of the G and NE signals.
DTC No.DTC Detection ConditionTrouble Area
P0340/12

No camshaft position sensor signal to ECM during cranking
(1 trip detection logic)
Open or short in camshaft position sensor circuit
ChftitiP0340/12(1 tri detection logic)

No camshaft position sensor signal to ECM with engine
speed 600 rpm or more (1 trip detection logic)
Camshaft position sensor

Camshaft timing pulley

Timingchainhasjumpedatooth
P0341/12While crankshaft rotates twice, camshaft position sensor signal
is input to ECM 12 times or more (1 trip detection logic)
Timing chain has jumped a tooth

ECM
Reference: Inspection using the oscilloscope.
HINT:
The correct waveform is as shown on the left.
ItemContents
TerminalCH1: G2+ ± NE±
CH2: NE+ ± NE±
Equipment Set5V/DIV, 20ms/DIV
ConditionDuring cranking or idling
WIRING DIAGRAM
Refer to DTC P0335/12, 13 and P0339/13 on page 05±226.
INSPECTION PROCEDURE
HINT:
Read freeze frame data using \f  \b \f\f
 Freeze frame data records the engine conditions when
a malfunction is detected. When troubleshooting, it is useful for determi\
ning whether the vehicle was running
or stopped, the engine was warmed up or not, the air±fuel ratio was lea\
n or rich, etc. at the time of the mal-
function.
05C71±01

±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
05±111
AVENSIS REPAIR MANUAL (RM1018E)
DTCP1346VVT SENSOR/CAMSHAFT POSITION
SENSOR CIRCUIT RANGE/PERFORMANCE
PROBLEM (BANK 1)
CIRCUIT DESCRIPTION
Refer to DTC P0335 on page 05±84
DTC No.Detection ItemTrouble Area
P1346Deviation in crankshaft position sensor signal and camshaft
position sensor signal (2 trip detection logic)
Mechanical system (Timing chain has jumped a tooth, chain
stretched)

ECM
WIRING DIAGRAM
Refer to DTC P0335 on page 05±84
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the hand±held tester. Freeze frame data records the engine conditions when
the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was run-
ning or stopped, the engine was warmed up or not, the air±fuel ratio \
was lean or rich, etc. at the time of the
malfunction.
1CHECK VALVE TIMING (See page 14±49)
NGADJUST VALVE TIMING(See page 14±49)
OK
CHECK AND REPLACE ECM (See page 01±32)
0506C±04

±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
05±381
AVENSIS REPAIR MANUAL (RM1018E)
DTCP0134OXYGEN SENSOR CIRCUIT NO ACTIVITY
DETECTED (BANK 1 SENSOR 1)
DTCP0154OXYGEN SENSOR CIRCUIT NO ACTIVITY DETECTED (BANK 2 SENSOR 1)
CIRCUIT DESCRIPTION
Refer to DTC P0130 on page 05±363.
DTC No.DTC Detection ConditionTrouble Area
P0134
P0154
After engine is warmed up, heated oxygen sensor (sensor 1)
output does not indicate RICH (
0.45 V) even once when
conditions (a), (b), (c) and (d) continue for at least 65 sec.:
(a)Engine speed: 1,400 rpm or more
(b)Vehicle speed: 130 km/h (81 mph)
(c)Throttle valve is not fully closed
(d)180 sec. or more after starting engine

Open or short in heated oxygen sensor (bank 1, 2 sensor 1)
circuit

Heated oxygen sensor (bank 1, 2 sensor 1)

Heated oxygen sensor heater (bank 1, 2 sensor 1)

EFI relay

Air induction system

Fuel pressure

PCV hose connection

PCV valve and hose

Injector

Gas leakage in exhaust system

ECM
HINT:

&$"!$ !%\b \f!\b
\f'%&!&%&$&""!$ &"'&#'&("&"
&&")*!%!%"$! 
%!%"$ $" & ºDIAGNOSIS / OBD/MOBD / DATA LIST / ALLº
&"'&#'&("&"&&")*!%!%"$%%%&!\b &&")*!%!%"$$'&
*"#!"$%"$&

Bank 1 refers to the No. 1 and No. 4 cylinders.

Bank 2 refers to the No. 2 and No. 3 cylinders.

Sensor 1 refers to the sensor closest to the engine assembly.
WIRING DIAGRAM
Refer to DTC P0130 on page 05±363.
INSPECTION PROCEDURE
HINT:
Hand±held tester only:
Narrowing down the trouble area is possible by performing the ºA/F CONTROLº ACTIVE TEST (heated oxy-
gen sensor or other trouble areas can be distinguished).
(a) Perform ACTIVE TEST using the hand±held tester (A/F CONTROL).
HINT:
ºA/F CONTROLº is an ACTIVE TEST which changes the injection volume\
±12.5 % or +25 %.
(1) Connect the hand±held tester to the DLC3 on the vehicle.
(2) Turn the ignition switch ON.
(3) Warm up the engine by running the engine at 2,500 rpm for approximately 9\
0 sec.
(4) Select the item ºDIAGNOSIS / OBD/MOBD / ACTIVE TEST / A/F CONTROLº\
.
(5) Perform ºA/F CONTROLº 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 0.55 V
±12.5 %
lean output: Less than 0.4 V
05CKB±01

+25 %
±12.5 %
More than 0.55 V
Less than 0.4V
Case 1
Case 2
Case 3
Case 4
Output voltage of heated oxygen
sensor (sensor 1: front sensor)
Injection volume
Output voltage
Output voltage of heated oxygen
sensor (sensor 2: rear sensor)Mainly suspect
trouble area
OK
+25 %
±12.5 %
More than 0.55 V
Less than 0.4V
Injection volume
Output voltage
+25 %
±12.5 %
More than 0.55 V
Less than 0.4V
Injection volume
Output voltage
Sensor 1: front sensor
(sensor 1, heater, sensor 1
circuit)
+25 %
±12.5 %
More than 0.55 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
No reaction
No reaction
No reaction No reaction


Sensor 2: rear sensor
(sensor 2, heater, sensor 2
circuit) 05±382
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
NOTICE:
There is a few seconds delay in the sensor 1 (front sensor) output. And there is about 20 seconds
delay in the sensor 2 (rear sensor).
The following A/F CONTROL procedure enables the technician to check and graph the voltage outputs of
both the heated oxygen sensors.
For displaying the graph indication, enter ºACTIVE TEST / A/F CONTROL / USER DATAº, then select ºO2S
B1S1 and O2S B1S2º or ºO2S B2S1 and O2S B2S2º by pressing ºYESº button and push ºENTERº button
before pressing ºF4º button.
HINT:

If different DTCs related to different systems that have terminal E2 as the ground terminal are output
simultaneously, terminal E2 may be open.

Read freeze frame data using the hand±held tester. Freeze frame data records the engine conditions
when a malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle
was running or stopped, the engine was warmed up or not, the air±fuel ratio was lean or rich, etc. at
the time of the malfunction.

A high heated oxygen sensor (sensor 1) voltage (0.55 V or more) could be caused by a rich air fuel
mixture. Check for conditions that would cause the engine to run rich.

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.

A62378
Component Side
+B
HT
E1


 B1S1 H7
A61830
+B
HT
E1 Component Side
B2S1 H9
B16200
05±384
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
5 CONFIRM IF VEHICLE HAS RUN OUT OF FUEL IN PAST
NO CHECK FOR INTERMITTENT PROBLEMS
YES
DTC IS CAUSED BY RUNNING OUT OF FUEL (DTC P0134 AND/OR P0154)
6 CHECK CONNECTION OF PCV HOSE
NG REPAIR OR REPLACE PCV HOSE
OK
7 INSPECT HEATED OXYGEN SENSOR(HEATER RESISTANCE)
(a) Disconnect the H7 or H9 heated oxygen sensor connec-
tor.
(b) Measure the resistance between the terminals of the
heated oxygen sensor connector.
Standard (Bank 1, 2 Sensor 1):
Terminal No.Resistance
1 (HT) ± 2 (+B)11 to 16
at 20
C (68
F)
1 (HT) ± 4 (E1)No Continuity
NG REPLACE HEATED OXYGEN SENSOR
OK
8 INSPECT EFI RELAY
(a) Remove the EFI relay from the engine room R/B No. 4.
(b) Inspect the EFI relay.
Standard:
Terminal No.Specified condition
1 ± 2Continuity
No Continuity
3 ± 5Continuity
(Apply battery voltage terminals 1 and 2)