2005 TOYOTA AVENSIS Circuit

A81508
ECM EDU
IJT#1 INJF
COM1 INF
IJT#4
IJT#2
IJT#3 #1
#4
#2
#3INJ#1
INJ#4
INJ#2
INJ#3 COM2
Injector
AB
Warning: Terminal COM1, COM2, and INJ#1to 4 are high−voltage
C DHigh−voltage Area
A09438
#1
#2#3
#45V/
Division
20 msec./Division Signal Waveform
− DIAGNOSTICSECD SYSTEM (1CD−FTV)(From September, 2003)
05−371
AVENSIS Supplement (RM1045E)
PULSE GENERATION INSPECTION
HINT:
Problem area can be identified by checking the waveform at the following terminals.
HINT:
If you check the ECM side first, inspect the following A and D in sequence. If you check the EDU side first,
inspect the following B and C in sequence. This shortens inspecting time.
Malfunction PointTrouble Area
ASECM
B (if A is normal)SOpen or short in ”#1 to #4 (ECM)”−”IJT#1 to IJT#4 (EDU)” harness or connector
C (if A and B are normal)
SOpen or short in ”INJ#1 to INJ#4 (EDU)”−”COM1 and/or COM2” (EDU) circuit
SInjector
SEDU
D (if A, B and C are normal)SOpen or short in ”INJ (EDU)”−”INJF (ECM)” circuit (P1271 is set simultaneously)
(a) Reference: Inspection using the oscilloscope.
During idling, the correct waveform is as shown in the dia-
gram on the left.
Inspection PointsSpecified Condition
A and BCorrect waveform is as shown

A66060ECM ConnectorE1
E13
#2
#1#3 #4 E12
INJF
A09438
#1
#2
#3
#4 5V/
Division
20 msec./Division
Signal Waveform
A09437
5V/
Division
20 msec./Division
Signal Waveform
INJF
−
DIAGNOSTICS ECD SYSTEM (1CD−FTV)(From September, 2003)
05 −375
AVENSIS Supplement (RM1045E)
NG CHECK INJECTOR DRIVER POWER SOURCE
CIRCUIT (BATTERY − EDU)
OK
7 INSPECT ECM(INJECTOR VOLTAGE)
(a) Inspect using the oscilloscope.
(b) During idling, check the waveform between the specified terminals of the E12 and E13 ECM connectors.
Standard:
Tester ConnectionSpecified Condition
#1 (E13 −24) − E1 (E12 −7)
#2 (E13 −23) − E1 (E12 −7)
#3 (E13 −22) − E1 (E12 −7)Correct waveform is as shown
#4 (E13 −21) − E1 (E12 −7)
INJF (E13 −25) − E1 (E12 −7)
NG REPLACE ECM (See page 10− 29)
OK
8 REPLACE INJECTOR DRIVER
GO
CHECK IF DTC OUTPUT RECURS (DTC P0200)
HINT:
After clearing the DTC, start the engine and let it idle for 30 seconds, and then confirm that P0200 is not
present again.

−
DIAGNOSTICS ECD SYSTEM (1CD −FTV)(From September, 2003)
05 −367
AVENSIS Supplement (RM 1045E)
DTC P0 191 FUEL RAIL PRESSURE SENSOR CIRCUIT
RANGE/PERFORMANCE
CIRCUIT DESCRIPTION
Refer to DTC P0087 on page 05 −314.
INSPECTION PROCEDURE
HINT:
S If DTCs P0087, P0 190, P0 192, and P0 193 are output simultaneously, the manifold absolute pressure
sensor circuit may be open or short. Perform troubleshooting for those DTCs first.
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.
DTC No.DTC Detection ConditionTrouble Area
P0 191
Voltage output of the fuel pressure sensor for the common rail
is out of the standard range
(1 trip detection logic)
S Fuel pressure sensor
1 CHECK OTHER DTC OUTPUT(IN ADDITION TO DTC P0 191)
(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 / CURRENT CODES”.
(d) Read DTCs. Result:
Display (DTC output)Proceed to
P0191A
P0 191 and other DTCsB
HINT:
If any other codes besides P0 191 are output, perform troubleshoot for those DTCs first.
B GO TO RELEVANT DTC CHART(See page 05 −299)
A
REPLACE COMMON RAIL ASSY (FUEL PRESSURE SENSOR) (See page 11− 67)
05CPQ −03

−
DIAGNOSTICS ECD SYSTEM (1CD −FTV)(From September, 2003)
05 −36 1
AVENSIS Supplement (RM 1045E)
DTC P0 168 FUEL TEMPERATURE TOO HIGH
CIRCUIT DESCRIPTION
Refer to DTC P0 180 on page 05 −362.
DTC No.DTC Detection ConditionTrouble Area
If the fuel temperature between was 35 ˚ C (95 ˚ F) and 60 ˚ C
( 1 40 ˚ F) at engine start, and condition (a) and (b) are met:
(2 trip detection logic)
(a) Vehicle is driven at varying speeds (under acceleration and
deceleration)
(b) Fuel temperature remains within 3 ˚ C (37 ˚ F) of the engine
starting temperature
P0 168If the fuel temperature was more than 60 ˚ C( 140 ˚ F) at engine
start, and conditions (a) and (b) are met:
(6 trip detection logic)
(a) Vehicle is driven at varying speeds (under acceleration and
deceleration)
(b) fuel temperature remains within 1˚ C (34 ˚ F) of the engine
starting temperature, and this is successively recorded 6
timesS Fuel temperature sensor
INSPECTION PROCEDURE
HINT:
S If DTCs P0 180, P0 182 and P0 183 are output simultaneously, the fuel temperature sensor circuit may
be open or short. Perform troubleshooting for those DTCs first.
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 CHECK OTHER DTC OUTPUT(IN ADDITION TO DTC P0 168)
(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 / CURRENT CODES”.
(d) Read DTCs. Result:
Display (DTC output)Proceed to
P0168A
P0 168 and other DTCsB
HINT:
If any other codes besides P0 168 are output, perform troubleshooting for those DTCs first.
B GO TO RELEVANT DTC CHART(See page 05 −299)
A
REPLACE FUEL TEMPERATURE SENSOR
05CPO −03

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

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.

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.

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