Page 4257 of 5135

A92196
Hall IC
VC
E25V
Magnet
Magnet Intake Shutter (Throttle Valve)
Position Sensor
VTAECM
E2 VLUVC
− DIAGNOSTICSECD SYSTEM (1CD−FTV)(From September, 2003)
05−357
AVENSIS Supplement (RM1045E)
DTC P0120 THROTTLE/PEDAL POSITION
SENSOR/SWITCH ”A” CIRCUIT
DTC P0122 THROTTLE/PEDAL POSITION
SENSOR/SWITCH ”A” CIRCUIT LOW INPUT
DTC P0123 THROTTLE/PEDAL POSITION
SENSOR/SWITCH ”A” CIRCUIT HIGH INPUT
HINT:
SThis is the purpose of troubleshooting the intake shutter (throttle valve) position sensor.
SThis electrical throttle system does not use a throttle cable.
SThis intake shutter position sensor is a non−contact type.
CIRCUIT DESCRIPTION
The intake shutter (throttle valve) position sensor is mounted on the intake shutter body and it detects the
opening angle of the intake shutter. This sensor is electronically controlled and uses Hall−effect elements.
The ECM judges the vehicle driving conditions from this signals input from terminal VLU, uses them as one
of the conditions for EGR control etc.
05I7L−01
Page 4258 of 5135

A91224
Range of operationIntake Shutter (Throttle Valve)
Position Sensor Output Voltage (V)
Detect P0120 or P0123
Detect P0120 or P0122
4.80
0.200.693.49
Intake Shutter Valve (Throttle Valve) Opening Angle0Open
Closed
5.00
05−358
− DIAGNOSTICSECD SYSTEM (1CD−FTV)(From September, 2003)
AVENSIS Supplement (RM1045E)DTC No.
DTC Detection Condition
Condition of DTC P0120, P0122 or P0123 continues for 3 seconds (Open or
short in intake shutter [throttle valve] position sensor circuit)Trouble Area
P0120
Intake shutter position sensor output (VLU) flutters up and
down beyond the normal operating range
(Less than 0.2 V or more than 4.8 V)
(1 trip detection logic)SOpen or short in intake shutter position sensor circuit
SIntake shutter position sensor
SECM
P0122Intake shutter position sensor output (VLU) is less than 0.2 V
(1 trip detection logic)
SIntake shutter position sensor
SOpen or short in VLU circuit
SOpen in VC circuit
SECM
P0123Intake shutter position sensor output (VLU) is more than 4.8 V
(1 trip detection logic)
SIntake shutter position sensor
SOpen in E2 circuit
SVC and VLU circuits are short−circuited
SECM
MONITOR DESCRIPTION
When output voltage of the intake shutter position sensor deviates from the normal operating range (be-
tween 0.2 V and 4.8 V) for more than 3 seconds, the ECM interprets this as malfunction of the sensor circuit,
and illuminates the CHK ENG.
Page 4259 of 5135

A91219
VCECM
VLU
E2 L−W R−W
BR I18
Intake Shutter (Throttle Valve) Position Sensor
1
3
218
E13
29
E12
28
E13 VC
E2 VTA5V
E1
A81088
E12
ECM Connector
VC
E2 VLU E13
23 1
A92970
Intake Shutter Position
Sensor Connector Wire Harness Side:
VCE2
VTA
I18
Front View
− DIAGNOSTICSECD SYSTEM (1CD−FTV)(From September, 2003)
05−359
AVENSIS Supplement (RM1045E)
WIRING DIAGRAM
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.
1CHECK HARNESS AND CONNECTOR(INTAKE SHUTTER (THROTTLE VALVE)
POSITION SENSOR−ECM)
(a) Disconnect the I18 intake shutter position sensor connec-
tor.
(b) Disconnect the E12 and E13 ECM connectors.
(c) Measure the resistance between the terminals of the E12
and E13 ECM connectors.
Standard:
Tester ConnectionIntake ShutterSpecified Condition
VC (E13−18)
−E2 (E13−28)2.5 to 5.9 k
VLU (E12−29)Fully closed0.2 to 5.7 kVLU(E1229)
−E2 (E13−28)Fully open2.0 to 10.2 k
(d) Measure the resistance between the terminals of the E12
ECM connector.
Standard (Check for short):
Tester ConnectionSpecified Condition
VC (E13−18)−Body ground10korhigherVLU (E12−29)−Body ground10 kor higher
(e) Reconnect the intake shutter position sensor connector.
(f) Reconnect the ECM connectors.
Page 4260 of 5135

A66060
VC (+)
E2 ( −)E13
ECM Connector
05 −360
−
DIAGNOSTICS ECD SYSTEM (1CD−FTV)(From September, 2003)
AVENSIS Supplement (RM1045E)
NG REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
2 INSPECT ECM(VC VOLTAGE)
(a) Turn the ignition switch to ON.
(b) Measure the voltage between the specified terminals of the E13 ECM connector.
Standard:
Tester ConnectionSpecified Condition
VC (E13 −18) − E2 (E13 −28)4.5 to 5.5 V
NG REPLACE ECM (See page 10− 29)
OK
3 REPLACE INTAKE SHUTTER ASSY (THROTTLE VALVE) (See page 10− 27)
GO
4 CHECK IF DTC OUTPUT RECURS(DTC P0 120, P0 122 AND/OR P 123)
(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 / CLEAR CODES”.
(d) Clear the DTCs.
(e) Let the engine idle for 60 seconds and perform quick acceleration engine RPM (to 2,500 rpm) for 30
seconds.
(f) Select the item ”DIAGNOSIS / OBD/MOBD / DTC INFO / CURRENT CODES”.
(g) Read DTCs.
Result:
Display (DTC output)Proceed to
P0120, P0122 and/or P0123A
No outputB
B SYSTEM OK
A
REPLACE ECM (See page 10− 29)
Page 4261 of 5135

05−352
− DIAGNOSTICSECD SYSTEM (1CD−FTV)(From September, 2003)
AVENSIS Supplement (RM1045E)
DTC P0115 ENGINE COOLANT TEMPERATURE CIRCUIT
DTC P0117 ENGINE COOLANT TEMPERATURE CIRCUIT
LOW INPUT
DTC P0118 ENGINE COOLANT TEMPERATURE CIRCUIT
HIGH INPUT
CIRCUIT DESCRIPTION
A thermistor built in the engine coolant temperature sensor changes its resistance value according to the
engine coolant temperature.
The structure of the sensor and connection to the ECM is the same as those of the intake air temperature
sensor.
DTC No.Proceed toDTC Detection ConditionTrouble Area
P0115Step1
Open or short in engine cool-
ant temperature sensor circuit
for 0.5 second
(1trip detection logic)
P0117St4
SShort in engine coolant tem-
perature sensor circuit for
0.5 second
SOpenorshortinenginecoolanttemperaturesensorcircuitP0117Step 40.5second
(Sensor resistance value is
less than 79
(1trip detection logic)SOpen or short in engine coolant temperature sensor circuit
SEngine coolant temperature sensor
SECM
P0118St2
SOpen in engine coolant tem-
perature sensor circuit for
0.5 second
P0118Step 20.5second
(Sensor resistance value is
more than156 k
(1trip detection logic)
HINT:
After confirming DTC P0115, P0117orP0118, check the engine coolant temperature in the ”DIAGNOSIS
/ OBD/MOBD / DATA LIST / ALL” using the hand−held tester.
Reference:
Temperature DisplayedMalfunction
−40˚C(−40˚F)Open circuit
140˚C(284˚F) or moreShort circuit
05CPM−05
Page 4262 of 5135

A81000
ECM
THW E2
1
9
E 13
28
E 13
L
W
1 2
E2
Engine Coolant Temperature Sensor
5V
R
BR
B
−W
2
EC 1
1
EC 1
−
DIAGNOSTICS ECD SYSTEM (1CD −FTV)(From September, 2003)
05 −353
AVENSIS Supplement (RM 1045E)
WIRING DIAGRAM
INSPECTION PROCEDURE
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.
1 READ VALUE OF HAND −HELD TESTER(ENGINE COOLANT TEMPERATURE)
(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 / DATA LIST / ALL / COOLANT TEMP” and read its value
displayed on the hand −held tester.
Standard: 75 to 95 _C( 167 to 203 _F) after warming up the engine.
Result:
Temperature DisplayedProceed to
− 40 ˚ C( −40 ˚F )A
140 ˚ C (284 ˚F ) or moreB
OK (Same as actual engine coolant temperature)C
HINT:
S If there is an open circuit, the hand −held tester indicates −40 ˚C( −40 ˚F).
SIf there is a short circuit, the hand −held tester indicates 140 ˚C (284 ˚F) or more.
B Go to step 4
C CHECK FOR INTERMITTENT PROBLEMS (See page 05 −270)
A
Page 4263 of 5135

A83861
Engine Coolant
Temperature Sensor ECM
THW
E2
E2
A76786
Wire Harness Side:
Engine Coolant Temperature
Sensor Connector
E2
Front View
A83862
Engine Coolant
Temperature Sensor ECM
THW
E2
E2
A80457
THW
E2
E13
ECM Connector
05 −354
−
DIAGNOSTICS ECD SYSTEM (1CD −FTV)(From September, 2003)
AVENSIS Supplement (RM 1045E)
2 READ VALUE OF HAND −HELD TESTER(CHECK FOR OPEN IN WIRE HARNESS)
(a) Disconnect the E2 engine coolant temperature sensor
connector.
(b) Connect terminals 1 and 2 of the engine coolant tempera-
ture sensor wire harness side connector.
(c) Connect the hand −held tester to the DLC 3.
(d) Turn the ignition switch to ON and turn the hand −held tes-
ter ON.
(e) Select the item ”DIAGNOSIS / OBD/MOBD / DATA LIST
/ ALL / COOLANT TEMP” and read its value displayed on
the hand −held tester.
Standard: 140 C (284 F) or more
(f) Reconnect the engine coolant temperature sensor con-
nector.
OK CONFIRM GOOD CONNECTION AT SENSOR. IF OK, REPLACE ENGINE COOLANT
TEPMERATURE SENSOR
NG
3 READ VALUE OF HAND −HELD TESTER(CHECK FOR OPEN IN ECM)
(a) Disconnect the E2 engine coolant temperature sensor
connector.
(b) Connect terminals THW and E2 of the E 13 ECM connec-
tor.
HINT:
Before checking, do a visual and contact pressure check on the
ECM connector.
(c) Connect the hand −held tester to the DLC 3.
(d) Turn the ignition switch to ON and turn the hand −held tes-
ter ON.
(e) Select the item ”DIAGNOSIS / OBD/MOBD / DATA LIST / ALL / COOLANT TEMP” and read its value displayed on
the hand −held tester.
Standard: 140 C (284 F) or more
(f) Reconnect the engine coolant temperature sensor con- nector.
OK REPAIR OR REPLACE HARNESS OR CONNECTOR
NG
CONFIRM GOOD CONNECTION AT ECM. IF OK, REPLACE ECM (See page 10− 29)
Page 4264 of 5135

A83863
Engine Coolant
Temperature SensorECM
THW
E2
E2
A83864
Engine Coolant
Temperature Sensor
ECM
THW
E2
E2
A80458
E
13
C C
ECM Connector
THW
−
DIAGNOSTICS ECD SYSTEM (1CD −FTV)(From September, 2003)
05 −355
AVENSIS Supplement (RM 1045E)
4 READ VALUE OF HAND −HELD TESTER(CHECK FOR SHORT IN WIRE HARNESS)
(a) Disconnect the E2 engine coolant temperature sensor
connector.
(b) Connect the hand −held tester to the DLC 3.
(c) Turn the ignition switch to ON and turn the hand −held tes-
ter ON.
(d) Select the item ”DIAGNOSIS / OBD/MOBD / DATA LIST
/ ALL / COOLANT TEMP” and read its value displayed on
the hand −held tester.
Standard: −40 C( −40 F)
(e) Reconnect the engine coolant temperature sensor con-
nector.
OK REPLACE ENGINE COOLANT TEMPERATURE SENSOR
NG
5 READ VALUE OF HAND −HELD TESTER(CHECK FOR SHORT IN ECM)
(a) Disconnect the E2 engine coolant temperature sensor
connector.
(b) Disconnect the E 13 ECM connector.
(c) Connect the hand −held tester to the DLC 3.
(d) Turn the ignition switch to ON and turn the hand −held tes-
ter ON.
(e) Select the item ”DIAGNOSIS / OBD/MOBD / DATA LIST / ALL / COOLANT TEMP” and read its value displayed on
the hand −held tester.
Standard: −40 C( −40 F)
(f) Reconnect the engine coolant temperature sensor con- nector.
(g) Reconnect the ECM connector.
OK REPAIR OR REPLACE HARNESS OR CONNECTOR
NG
REPLACE ECM (See page 10− 29)