2005 TOYOTA AVENSIS fuel

A01512
(V)
(3.96)
3.6
2.4
1.2
150 450
750(840)mmHg
kPa
20 60 100(112)
Manifold Absolute PressureOutput Voltage
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
05−61
AVENSIS Supplement (RM1045E)
DTC P0105 MANIFOLD ABSOLUTE
PRESSURE/BAROMETRIC PRESSURE
CIRCUIT
DTC P0107 MANIFOLD ABSOLUTE
PRESSURE/BAROMETRIC PRESSURE
CIRCUIT LOW INPUT
DTC P0108 MANIFOLD ABSOLUTE
PRESSURE/BAROMETRIC PRESSURE
CIRCUIT HIGH INPUT
CIRCUIT DESCRIPTION
By a built−in sensor unit, the manifold absolute pressure sensor
detects the intake manifold pressure as a voltage. The ECM
then determines the basic injection duration and basic ignition
advance angle based on this voltage.
Since the manifold absolute pressure sensor does not use the
atmospheric pressure as a standard, but senses the absolute
pressure inside the intake manifold (the pressure in proportion
to the preset absolute vacuum 0), it is not influenced by fluctua-
tions in the atmospheric pressure due to high altitude and other
factors. This permits it to control the air−fuel ratio at the proper
level under all conditions.
If the ECM detects the DTC P0105, P0107 or P0108, it operates
the fail−safe function, keeping the ignition timing and fuel injec-
tion volume constant and making it possible to drive the vehicle.
DTC No.DTC Detection ConditionTrouble Area
P0105Open or short in manifold absolute pressure sensor circuit for
0.5 second or moreSOpen or short in manifold absolute pressure sensor circuit
SManifold absolute pressure sensor
SECM
P0107Open in manifold absolute pressure sensor circuit for 0.5 se-
cond or moreSOpen or short in manifold absolute pressure sensor circuit
SManifold absolute pressure sensor
SECM
P0108Short in manifold absolute pressure sensor circuit for 0.5 se-
cond or moreSOpen or short in manifold absolute pressure sensor circuit
SManifold absolute pressure sensor
SECM
HINT:
After confirming DTC P0105, P0107 or P0108, use the hand−held tester to confirm the manifold absolute
pressure in DIAGNOSIS / OBD/MOBD / DATA LIST / ALL.
Manifold Absolute Pressure (kPa)Malfunction
Approximately 0SPIM circuit short
142 or more
SVC circuit open or short
SPIM circuit open
SE2 circuit open
05CJF−02

A00309
V1
Manifold Absolute Pressure Sensor18
E13 ECM
5V
E1
1 R
−W
33
G −W
2 3
BR 28
E2 PIM VC
VOUT
GND E13
E13
VCC
05
−62
−
DIAGNOSTICS SFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM1045E)
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
S If DTCs related to different systems that have terminal E2 as the ground terminal are output simulta-
neously, 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.
1 READ VALUE OF HAND −HELD TESTER(INTAKE MANIFOLD ABSOLUTE
PRESSURE)
(a) Connect the hand −held tester to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the hand −held tester ON.
(d) On the hand −held tester, select the item: DIAGNOSIS / OBD/MOBD / DATA LIST / ALL / MAP.
(e) Read the values.
Pressure: Same as the atmospheric pressure
Result:
Manifold Absolute Pressure (kPa)Proceed to
142 or moreA
0.0B
OK (Same as actual atmospheric pressure) (*1)C
*1: The value must be changed when the engine is run or stopped.
B Go to step 3
C CHECK FOR INTERMITTENT PROBLEMS(See Page 05 −7)
A

A80089
AB B+
Power Transistor
Platinum Hot Wire
(Heater)
Output
Voltage
Temperature
sensor
Platinum Hot Wire (Heater)
Temperature sensor
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
05−55
AVENSIS Supplement (RM1045E)
DTC P0100 MASS OR VOLUME AIR FLOW CIRCUIT
DTC P0102 MASS OR VOLUME AIR FLOW CIRCUIT
LOW INPUT
DTC P0103 MASS OR VOLUME AIR FLOW CIRCUIT
HIGH INPUT
CIRCUIT DESCRIPTION
The MAF (Mass Air Flow) meter measures the amount of air flowing through the throttle valve. The ECM uses
this information to determine the fuel injection time and provide a proper air−fuel ratio. Inside the MAF meter,
there is a heated platinum wire exposed to the flow of intake air.
By applying a specific current to the wire, the ECM heats this wire to a given temperature. The flow of incom-
ing air cools the wire and an internal thermistor, changing their resistance. To maintain a constant current
value, the ECM varies the voltage applied to these components in the MAF meter. The voltage level is pro-
portional to the airflow through the sensor and the ECM interprets this voltage as the intake air amount.
The circuit is constructed so that the platinum hot wire and temperature sensor provide a bridge circuit, with
the power transistor controlled so that the potential of A and B remains equal to maintain the set temperature.
DTC No.DTC Detection ConditionTrouble Area
P0100Open or short in mass air flow meter circuit for more than 3
seconds at engine speed of 4,000 rpm or lessSOpen or short in mass air flow meter circuit
SMass air flow meter
SECM
P0102Open or short in mass air flow meter circuit for more than 3
seconds at engine speed of 4,000 rpm or less
SOpen in mass air flow meter circuit
SShort in ground circuit
SMass air flow meter
SECM
P0103
Open in mass air flow meter circuit for more than 3 seconds
(EVG circuit) at engine speed of 4,000 rpm or less
Short in mass air flow meter circuit for more than 3 seconds
(+B circuit) at engine speed of 4,000 rpm or lessSOpen in mass air flow meter circuit (EVG circuit)
SShort in mass air flow meter circuit (+B circuit)
SMass air flow meter
SECM
05CJE−02

A76863
B−Y
Battery FL MAINEngine Room R/B No. 4
L−Y EFI Relay
A6
Mass Air Flow MeterMREL
B−G 4B 1
W−BB−W 53
2
1
29
E13 8
E9ECM
EFI No. 2
EC 4A 1
Engine Room
J/B No. 4 1A 1
B−G 1 2
EFI 1
Engine Room
R/B No.1and
Engine Room
J/B No.14
4
44
4
4
2
1 W−B
B−W
B−WGR
GRIE1 2
EVG 30
E13VG
G 1
3
2 EA1 13 05−56
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM1045E)
HINT:
After confirming DTC P0100, P0102 or P0103, use the hand−held tester to confirm the air flow rate from the
DIAGNOSIS / OBD/MOBD / DATA LIST / ALL.
Air flow rate (gm/s)Malfunction
Approximately 0.0SMass air flow meter power source circuit open
SVG circuit open or short
271.0 or moreSEVG circuit open
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Read freeze frame data usingthe 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.

A72920
Reference (Bank1 Sensor 1 System Drawing)
Heated Oxygen Sensor
EFI Relay
Heater
SensorOX1A
HT
1A
Duty
Control
ECM
From
Battery EFI Fuse
E2
EFI No. 2
Fuse
MREL
OX HT
E 1
+B
05
−50
−
DIAGNOSTICS SFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM 1045E)
CIRCUIT DESCRIPTION
Refer to DTC P0 130 on page 05 −82.
HINT:
The ECM provides a pulse width modulated control circuit to adjust current through the heater. The heated
oxygen sensor heater circuit uses a relay on the B+ side of the circuit.
DTC No.DTC Detection ConditionTrouble Area
P003 1
P0037
P005 1
P0057( 1 ) Heated current is 0.2 A or less when heater operates with
+B voltage between 10.5 V and 11 .5 V ( 1 trip detection logic)
(2) Heated current is 0.25 A or less when heater operates with
+B greater than 11 .5 V ( 1 trip detection logic)S Open in heater circuit of heated oxygen sensor
S Heated oxygen sensor heater
S EFI relay
S EFI No. 2 fuse
S ECM
P0032
P0038
P0052
P0058
When heater operates, heater current exceeds 2 A
(1 trip detection logic)
S Short in heater circuit of heated oxygen sensor
S Heated oxygen sensor heater
S EFI relay
S ECM
WIRING DIAGRAM
Refer to DTC P0 130 on page 05 −82.
INSPECTION PROCEDURE
HINT:
SIf different DTCs related to different systems that have terminal E2 as the ground terminal are output
simultaneously, terminal E2 may have an open circuit.
SRead 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.

05−48
−
DIAGNOSTICS SFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM 1045E)
DTC P00 16 CRANKSHAFT POSITION − CAMSHAFT
POSITION CORRELATION (BANK 1 SENSOR
A)
CIRCUIT DESCRIPTION
Refer to DTC P0335 on page 05 −1 60.
DTC No.DTC Detection ConditionTrouble Area
P00 16Deviation in crankshaft position sensor signal and camshaft
position sensor (bank 1) signal (2 trip detection logic)S Mechanical system
(Timing chain has jumped a tooth, chain stretched)
S ECM
WIRING DIAGRAM
Refer to DTC P0335 on page 05 −1 60.
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 VALVE TIMING(CHECK FOR LOOSE AND A JUMPED TOOTH OF TIMING
CHAIN) (See page 14− 45)
NG ADJUST VALVE TIMING (See page 14− 45)
(REPAIR OR REPLACE TIMING CHAIN)
OK
REPLACE ECM (See page 10− 65 of Pub. No. RM 1018E AVENSIS)
05CE0 −02

A71007
Mass Air Flow Meter Crankshaft Position Sensor
Actual Valve TimingCorrection Target Valve Timing
Feedback
Duty Control ECM
Camshaft Timing
Oil Control
Valve (OCV)
Vehicle Speed Signal Engine Coolant Temp. SensorThrottle Position Sensor
Camshaft Position Sensor
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
05−41
AVENSIS Supplement (RM1045E)
DTC P0010 CAMSHAFT POSITION ”A” ACTUATOR
CIRCUIT (BANK1)
HINT:
This is the troubleshooting procedure of the oil control valve (OCV).
CIRCUIT DESCRIPTION
The Variable Valve Timing (VVT) system includes the ECM, the Oil Control Valve (OCV) and the VVT control-
ler. The ECM sends a target ”duty−cycle” control signal to the OCV. This control signal, applied to the OCV,
regulates the oil pressure supplied to the VVT controller. Camshaft timing control is performed based on en-
gine operation conditions such as intake air volume, throttle position and engine coolant temperature.
The ECM controls the OCV based on the signals output from several sensors. The VVT controller regulates
the intake camshaft angle using oil pressure through the OCV. As result, the relative position between the
camshaft and the crankshaft is optimized, and the engine torque improves, fuel economy improves, and ex-
haust emissions decrease. The ECM detects the actual valve timing using signals from the camshaft position
sensor and the crankshaft position sensor. The ECM performs feedback control and verifies target valve
timing.
DTC No.DTC Detection ConditionTrouble Area
P0010Open or short in OCV circuit
SOpen or short in OCV circuit
SOCV
SECM
05CDY−02

A59779
C2
Camshaft Timing Oil
Control Valve1
2 ECM
W −G
OC1+
15
Y −B
OC1−
E11
16
E11
05 −42
−
DIAGNOSTICS SFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM1045E)
WIRING DIAGRAM
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 PERFORM ACTIVE TEST BY HAND −HELD TESTER(OPERATE OCV)
(a) Connect the hand −held tester to the DLC3.
(b) Start the engine and warm it up.
(c) Turn the ignition switch to ON and turn the hand −held tester ON.
(d) Select the item: DIAGNOSIS / OBD/MOBD / ACTIVE TEST / VVT CTRL B1.
(e) Using the hand −held tester, operate the OCV and check the engine speed.
Standard:
Tester OperationSpecified Condition
OCV is OFFNormal engine speed
OCV is ONRough idle or engine stall
OK CHECK FOR INTERMITTENT PROBLEMS (See Page 05 −7)
NG
2 INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSY(OCV) (See page 10− 2)
NG REPLACE CAMSHAFT TIMING OIL CONTROL
VALVE ASSY
OK