2005 TOYOTA AVENSIS Service Repair Manual

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Page 473 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A75743
Engine Coolant
Temp. SensorECM
A76786
Wire Harness Side
Engine Coolant Temperature
Sensor ConnectorE2
A75742
Engine Coolant
Temp. Sensor
ECM
A76903
THW
E2
E13ECM Connector
±
DIAGNOSTICS SFI

Page 474 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A75766
Engine Coolant
Temp. SensorECM
A75744
Engine Coolant
Temp. SensorECM
A81699
E13
ECM Connector
05±354
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
4READ VALUE OF HAND

Page 475 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual ± 20 0 20 40 60 80 100
(± 4) 32 68 104 140 176 212 30
20
10
5
3
2
1
0.5
0.3
0.2
0.1
A67628
Acceptable (Fig.1)
Resistance K
Temp. C (F)
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
05±347
AVENSIS REPAIR M

± 20 0 20 40 60 80 100
(± 4) 32 68 104 140 176 212 30
20
10
5
3
2
1
0.5
0.3
0.2
0.1
A67628
Acceptable (Fig.1)
Resistance K
Temp. C (F)
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
05±347
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0110 INTAKE AIR TEMPERATURE CIRCUIT
DTC P0112 INTAKE AIR TEMPERATURE CIRCUIT LOW
INPUT
DTC P0113 INTAKE AIR TEMPERATURE CIRCUIT HIGH
INPUT
CIRCUIT DESCRIPTION
The intake air temperature sensor is built in the mass air flow
meter and senses the intake air temperature.
A thermistor built in the sensor changes the resistance value
according to the intake air temperature.
The lower the intake air temperature is the greater the thermis-
tor resistance value becomes and the higher the intake air tem-
perature is the lower the thermistor resistance value becomes
(See Fig. 1).
The intake air temperature sensor is connected to the ECM
(See below ). The 5 V power source voltage in the ECM is ap-
plied to the intake air temperature sensor from terminal THA via
resistor R.
That is, the resistor R and the intake air temperature sensor are
connected in series. When the resistance value of the intake air
temperature sensor changes in accordance with changes in the
intake air temperature, the potential at terminal THA also
changes. Based on this signal, the ECM increases the fuel in-
jection volume to improve the driveability during cold engine op-
eration.
If the ECM detects the DTC ºP0110, P0112 or P0113º, it oper-
ates the fail±safe functions in which the intake air temperature
is assumed to be 20C (68F).
DTC No.Proceed toDTC Detection ConditionTrouble Area
P0110Step 1
Open or short in intake air
temp. sensor circuit for 0.5
sec.Open or short in intake air temperature sensor circuit
Intake air temperature sensor (built in mass air flow meter)
ECM
P0112Step 4Short in intake air temp. sen-
sor circuit for 0.5 sec.Short in intake air temperature sensor circuit
Intake air temperature sensor (built in mass air flow meter)
ECM
P0113Step 2Open in intake air temp. sen-
sor circuit for 0.5 sec.Open in intake air temperature sensor circuit
Intake air temperature sensor (built in mass air flow meter)
ECM
HINT:
After confirming DTC ºP0110, P0112 or P0113º, use the hand±held tester to confirm the intake air tempera-
ture from the ºDIAGNOSIS / OBD/MOBD / DATA LIST / ALLº.
Temperature DisplayedMalfunction
±40 C (±40 F)Open circuit
140 (284 Short circuit
05CJG±01

Page 476 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A72925
BR GR
28 20
E13THA
E2ECM
54 A6
Intake Air Temperature Sensor
(Built in Mass Air Flow Meter)
E135V
R
THA
E2
E1
05±348
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
WIRI

Page 477 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A75743
ECM
Mass Air Flow
Meter Connector
A54396
E2THA
Wire Harness Side
Mass Air Flow Meter Connector
A6
A75742
ECM
Mass Air Flow
Meter Connector
A76903
THA
E2
E13ECM Connector
±
DIAGNOSTICS SFI SY

Page 478 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A75766
ECM
Mass Air Flow
Meter Connector
A75744
ECM
Mass Air Flow
Meter Connector
A81699
E13
ECM Connector
05±350
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
4READ VALUE O

Page 479 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A01512
(V)
(3.96)
3.6
2.4
1.2
150 450
750(840)mmHg
kPa
20 60 100(112)
Manifold Absolute PressureOutput Voltage
05±342
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0105 M

A01512
(V)
(3.96)
3.6
2.4
1.2
150 450
750(840)mmHg
kPa
20 60 100(112)
Manifold Absolute PressureOutput Voltage
05±342
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
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 criterion, 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 ºP0105, P0107 or P0108º, it oper-
ates the fail±safe function, keeping the ignition timing and fuel
injection volume constant and making it possible to drive the ve-
hicle.
DTC No.DTC Detection ConditionTrouble Area
P0105Open or short in manifold absolute pressure sensor circuit for
0.5 sec. or more
Open or short in manifold absolute pressure sensor circuit
P0107Open in manifold absolute pressure sensor circuit for 0.5 sec.
or moreOpen or short in manifold absolute pressure sensor circuit
Manifold absolute pressure sensor

ECM
P0108Short in manifold absolute pressure sensor circuit for 0.5 sec.
or moreECM
HINT:
After confirming DTC ºP0105, P0107 or P0108º, use the hand±held tester to confirm the manifold absolute
pressure from ºDIAGNOSIS / OBD/MOBD / DATA LIST / ALLº.
Manifold Absolute Pressure (kPa)Malfunction
Approximately 0PIM circuit short
142 or more
VC circuit open or short
PIM circuit open
E2 circuit open
05CJF±01

Page 480 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A00309
V1
Manifold Absolute Pressure Sensor
18
E13ECM
5V
E1 1R±W
33
G±W
2 3
BR28
E2 PIM VC
VOUT
GNDE13
E13 VCC
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
05±343
AVENSIS REPAIR MANUAL (RM1018E)
WIRING D

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