2005 TOYOTA AVENSIS Service Repair Manual

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Page 345 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A75766
ECM
Engine Coolant
Temperature Sensor
A75744
ECM
Engine Coolant
Temperature Sensor
A65743ECM Connector
E13
05±202
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
4READ V

Page 346 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A18294
THWE2
ECM Connector
E13
A65743
THWE2
ECM Connector
E13
A76786
Wire Harness Side
E2Engine Coolant Temperature
Sensor Connector
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
05±203
AVENSIS REPAIR MANUAL

Page 347 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)
05±194
± DIAGNOSTICSSFI SYSTEM (1AZ±FE)
AVENSIS REPAIR MA

± 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)
05±194
± DIAGNOSTICSSFI SYSTEM (1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0110/24 INTAKE AIR TEMPERATURE CIRCUIT
MALFUNCTION
DTC P0112/24 INTAKE AIR TEMPERATURE CIRCUIT LOW
INPUT
DTC P0113/24 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
(THAR) 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 (THAR)
also changes. Based on this signal, the ECM increases the fuel
injection volume to improve the driveability during cold engine
operation.
DTC No.Proceed toDTC Detection ConditionTrouble Area
P0110/24Step 1
Open or short in intake air
temp. sensor circuit for 0.5
sec.
Open or short in intake air temperature sensor circuit
P0112/24Step 4Short in intake air temp. sen-
sor circuit for 0.5 sec.
Oen or short in intake air tem erature sensor circuit
Intake air temperature sensor (built in mass air flow meter)
ECM
P0113/24Step 2Open in intake air temp. sen-
sor circuit for 0.5 sec.
After confirming DTC ºP0110/24, P0112/24 or P0113/24º, use the hand±held tester to confirm the intake air
temperature from the ºDIAGNOSIS / OBD/MOBD / DATA LIST / ALLº.
Temperature DisplayedMalfunction
±40C (±40Open circuit
140C (284 Short circuit
05C7G±01

Page 348 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A72925
BR
G±R
28
20
E13 THA
E2 ECM
5 4
A6
Intake Air Temperature Sensor
(Built in Mass Air Flow Meter)
E135V
R
THA
E2
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
05±195
AVENSIS REPAIR MANUAL (RM1018E)
WIR

Page 349 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A75743
Mass Air flow meterECM
A54396
A6
Wire Harness Side
Mass Air Flow Meter ConnectorE2
THA
A75742
ECM
Mass Air flow meter
A18294
THAE2
ECM Connector
E13
05±196
± DIAGNOSTICSSFI SYSTEM (1AZ±FE)
A

Page 350 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A75766
ECM
Mass Air Flow
Meter Connector
A75744
ECM
Mass Air flow meter
A65743
E13
ECM Connector
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
05±197
AVENSIS REPAIR MANUAL (RM1018E)
CONFIRM GOOD CONNECTION A

Page 351 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A18294
THAE2
ECM Connector
E13
A65743
THAE2
ECM Connector
E13
A54396
A6
Wire Harness SideMass Air Flow Meter Connector E2
THA
05±198
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018

Page 352 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual
AB B+
Power Transistor
Platinum Hot Wire
(Heater)
Output
Voltage
Temperature
sensor
Platinum Hot Wire (Heater)
Temperature sensor
A53295
05±186
± DIAGNOSTICSSFI SYSTEM (1AZ±FE)
AVEN

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