TOYOTA AVENSIS 2005 Service Repair Manual

A80462
SPDE2ECM Connector
E13
E10
A62954
Turn Wheel
4.5
to 5.5V
0V
05−410
−
DIAGNOSTICS ECD SYSTEM (1CD−FTV)(From September, 2003)
AVENSIS Supplement (RM1045E)
2 READ VALUE OF HAND −HELD TESTER(VEHICLE SPEED)
(a) Connect the hand −held tester to the DLC3.
(b) Turn the ignition switch to ON and turn the hand −held tester ON.
(c) Start the engine.
(d) Select the item ”DIAGNOSIS / OBD/MOBD / DATA LIST / ALL / VEHICLE SPD”.
(e) Check the vehicle speed at the engine speed of 2,000 rpm or more when the vehicle is running. Standard: Same value as the actual vehicle speed.
YES CHECK FOR INTERMITTENT PROBLEMS(See page 05 −270)
NO
3 INSPECT ECM(SP 1 VOLTAGE)
(a) Shift the transmission gear selector lever to the neutral
position.
(b) Jack up the vehicle.
(c) Turn the ignition switch to ON.
(d) Check the voltage between the specified terminals of the E10 and E13 ECM connectors as the wheel is turned
slowly.
Standard:
Tester ConnectionSpecified Condition
SPD (E10 −17) − E2 (E13 −28)Generated intermittently
HINT:
The output voltage should fluctuate up and down similarly to the
diagram on the left when the wheel is turned slowly.
NG REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE ECM (See page 10− 29)

− DIAGNOSTICSECD SYSTEM (1CD−FTV)(From September, 2003)
05−403
AVENSIS Supplement (RM1045E)
DTC P0488 EXHAUST GAS RECIRCULATION
THROTTLE POSITION CONTROL
RANGE/PERFORMANCE
CIRCUIT DESCRIPTION
The ECM opens and closes the intake shutter valve (throttle valve) using the rotary solenoid type actuator.
Upon opening and closing the valve, the exhaust gas recirculation volume is properly controlled. Also, en-
gine vibration and noise will be reduced by closing the valve when the engine is stopped.
DTC No.DTC Detection ConditionTrouble Area
P0488
Duty ratio during valve movement control stuck in its maximum
or minimum value for more than1second
(1trip detection logic)
SIntake shutter stuck
SIntake shutter does not move smoothly
SOpen or short in intake shutter circuit
SOpen or short in intake shutter position sensor circuit
SIntake shutter position sensor (built in intake shutter valve)
SECM
HINT:
After confirming DTC P0488, check the intake shutter position in the ”DIAGNOSIS / OBD/MOBD / DATA LIST
/ ALL / THROTTLE POS” using the hand−held tester.
Reference:
ConditionIntake Shutter (Throttle Valve) Position
Quickly accelerate the engine from idling to 3,000 rpmOpening angle varies smoothly
05I7P−01

A93021
Malfunction Detection:
Intake Shutter
(Throttle Valve)
Target Opening Angle
100 %
Duty Ratio
Malfunction Counter0% Normal
Abnormal
TimeThreshold
Intake Shutter
(Throttle Valve)
Actual Opening Angle
Duty RatioOpen
Close
Open
Close
Detect P0488Abnormal
Normal
05−404
− DIAGNOSTICSECD SYSTEM (1CD−FTV)(From September, 2003)
AVENSIS Supplement (RM1045E)
MONITOR DESCRIPTION
ECM opens and closes the intake shutter (throttle valve) by adjusting duration of current flowing to the rotary
solenoid with the duty ratio. If the intake shutter does not move smoothly or stuck, the duty ratio during the
valve movement control increases or decreases largely, the ECM judges the intake shutter abnormal and
illuminates the CHK ENG.

A91213
MREL B−W
GR8
3 EFI MAIN Relay
W−BE9 E12
2 EE1
EFIB−R
(LHD) 1
B5
Battery FL MAINI17
Intake Shutter (Throttle Valve)
LUSL 4
1
1
1 1A 1 1
121
2
B−W 10Engine Room R/B No.1ECM
1
Engine Room
R/B No. 3 3
3 B
EC B−Y
(RHD) IE1 2G−R
3
EI GR W−B DUTY
GND +B
− DIAGNOSTICSECD SYSTEM (1CD−FTV)(From September, 2003)
05−405
AVENSIS Supplement (RM1045E)
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
SRead 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.
SAfter engine warm−up, DTC P0488 malfunction is set1second or more passed after quickly accelerat-
ing the engine from idling.

05−406
−
DIAGNOSTICS ECD SYSTEM (1CD −FTV)(From September, 2003)
AVENSIS Supplement (RM 1045E)
1 CHECK OTHER DTC OUTPUT(IN ADDITION TO P0488)
(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
P0488A
P0488 and P0 120, P0 122 and/or P0 123B
HINT:
If any other codes besides P0488 are output, perform troubleshooting for those DTCs first.
B GO TO RELEVANT DTC CHART(See page 05 −299)
A
2 READ OUTPUT DTC(DTC P0488 OUTPUT)
(a) Connect the hand −held tester to the DLC3.
(b) Turn the ignition switch to ON and push the hand −held tester ON.
(c) Select the item ”DIAGNOSIS / OBD/MOBD / DTC INFO / CLEAR CODES”.
(d) Clear the DTCs.
(e) Start the engine and perform quick engine RPM acceleration from idling to 3,000 rpm 3 times.
(f) Select the item ”DIAGNOSIS / OBD/MOBD / DTC INFO / CURRENT CODES”.
(g) Read DTCs.
Result:
Display (DTC output)Proceed to
P0488A
No outputB
HINT:
The normal operation of the intake shutter (throttle valve) is as follows.Reference:
ConditionThrottle Position
Quickly accelerate the engine from idling to 3,000 rpmOpening angle varies smoothly
B CHECK FOR INTERMITTENT PROBLEMS (See page 05 −270)
A

A81086ECM Connector E
12
LUSL
E
1
A9 1225
Signal Waveform
1 V/
Division
2 msec./Division
LUSL
A9
1227
I1 7
Wire Harness Side:
Intake shutter Connector
Front VIew 1
2
3
DUTY
A8 1087
E 12
ECM Connector LUSL
−
DIAGNOSTICS ECD SYSTEM (1CD −FTV)(From September, 2003)
05 −407
AVENSIS Supplement (RM 1045E)
3 INSPECT ECM(LUSL VOLTAGE)
(a) Inspect using the oscilloscope.
(b) During rev −up, check the waveform between the speci-
fied terminals of the E 12 ECM connector.
Standard:
Tester ConnectionSpecified Condition
LUSL (E 12− 4) − E1 (E 19− 7)Correct waveform is as shown
NG REPLACE ECM (See page 10− 29)
OK
4 CHECK HARNESS AND CONNECTOR(INTAKE SHUTTER (THROTTLE VALVE) −
ECM)
(a) Disconnect the I 17 intake shutter connector.
(b) Disconnect the E 12 ECM connector.
(c) Check the resistance between the wire harness side con-
nectors.
Standard (Check for open):
Tester ConnectionSpecified Condition
LUSL (E 12− 4) − DUTY (I 17−1 )Below 1

Standard (Check for short):
Tester ConnectionSpecified Condition
LUSL (E 12− 4) or DUTY (I 17−1 )− Body ground10k
or higher
(d) Reconnect the intake shutter connector.
(e) Reconnect the ECM connector.
NG REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE INTAKE SHUTTER ASSY (THROTTLE VALVE) (See page 10− 27)

A91223
Output Voltage (V)0.1
0 4.0
2.1Detect P0406
Detect P0405 4.95.0
EGR Valve Opening Angle (%)0
100 Property of Output Voltage:
− DIAGNOSTICSECD SYSTEM (1CD−FTV)(From September, 2003)
05−399
AVENSIS Supplement (RM1045E)
DTC P0405 EXHAUST GAS RECIRCULATION SENSOR
”A” CIRCUIT LOW
DTC P0406 EXHAUST GAS RECIRCULATION SENSOR
”A” CIRCUIT HIGH
CIRCUIT DESCRIPTION
The EGR valve position sensor is mounted on the EGR valve and used for detecting the lift amount of the
valve. The lift amount detected by the sensor is provided to the ECM as feedback, the ECM then regulates
the lift amount of the valve in accordance with engine running condition.
DTC No.DTC Detection ConditionTrouble Area
P0405
EGR valve position sensor output voltage is less than 0.1 V for
more than 0.5 second
(1 trip detection logic)
SOpen or short in EGR valve position sensor circuit
SEGRvalvepositionsensor
P0406EGR valve position sensor output voltage is more than 4.9 V for
more than 0.5 second
(1 trip detection logic)SEGRvalve position sensor
SECM
HINT:
After confirming DTC P0405 and P0406, check the EGR valve opening angle condition in the ”DIAGNOSIS
/ OBD/MOBD / DATA LIST / ALL / EGR VALVE POS” using the hand−held tester.
ResultConditionIgnition switch ON (Engine is stop)Idling after warmed upCondition
Changes between 2.1 V and 4.0 VNormal
Less than 0.1 VP0405 (Low input voltage)
More than 4.9 VP0406 (High input voltage)
MONITOR DESCRIPTION
When output voltage of the EGR valve position sensor deviates
from the normal operating range (between 0.1 V and 4.9 V) for
more than 0.5 second, the ECM interprets this as malfunction
of the sensor circuit, and illuminates the CHK ENG.
05I7O−01

A12544
VCECM
EGLS
E2
R
R
−W
BR
E18
EGR Valve Position Sensor
1
3
2 18
E13
33
E12
28
E13
VC
E2
EGLS 5V
E1
A85350
E18
Front View
Wire Harness Side:
EGR valve position Sensor Connector
12 3
VC E2 EGLS
05 −400
−
DIAGNOSTICS ECD SYSTEM (1CD−FTV)(From September, 2003)
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 CHECK HARNESS AND CONNECTOR(EGR VALVE POSITION SENSOR VOLTAGE)
(a) Disconnect the E18 EGR valve position sensor connec-
tor.
(b) Measure the voltage between the specified terminals of
the E18 EGR valve position sensor connector.
Standard:
Tester ConnectionSpecified Condition
VC (E18 −1) − E2 (E18 −2)4.5 to 5.5 V
(c) Reconnect the EGR valve position sensor connector.
NG Go to step 4
OK
2 INSPECT EGR VALVE POSITION SENSOR(RESISTANCE) (See page 12− 9)
NG REPLACE EGR VALVE POSITION SENSOR
(See page 14−1 08)
OK

A85350
E18
Front View
Wire Harness Side:
EGR valve position Sensor Connector
12 3
VC E2 EGLS
A81087
E12
ECM Connector
EGLS
A85350
E18
Front View
Wire Harness Side:
EGR valve position Sensor Connector
12 3
VC E2 EGLS
A81087
E12
ECM Connector
EGLS
−
DIAGNOSTICS ECD SYSTEM (1CD−FTV)(From September, 2003)
05 −40 1
AVENSIS Supplement (RM1045E)
3 CHECK HARNESS AND CONNECTOR(EGR VALVE POSITION SENSOR − ECM)
(a) Disconnect the E18 EGR valve position sensor connec-
tor.
(b) Disconnect the E12 ECM connector.
(c) Check the resistance between the wire harness side con-
nectors.
Standard (Check for open):
Tester ConnectionSpecified Condition
EGLS (E18 −3) − EGLS (E12 −33)Below 1
E2 (E18 −2) − E2 (E13 −28)Below 1

Standard (Check for short):
Tester ConnectionSpecified Condition
EGLS (E18 −3) or EGLS (E12 −33) − Body ground10 k
or higher
(d) Reconnect the EGR valve position sensor connector.
(e) Reconnect the ECM connector.
NG REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE ECM (See page 10− 29)
4 CHECK HARNESS AND CONNECTOR(EGR VALVE POSITION SENSOR −ECM)
(a) Disconnect the E18 EGR valve position sensor connec-
tor.
(b) Disconnect the E12 ECM connector.
(c) Check the resistance between the wire harness side con- nectors.
Standard (Check for open):
Tester ConnectionSpecified Condition
EGLS (E18 −3) −EGLS (E12 −33)Below1
E2 (E18 −2) −E2 (E13 −28)Below 1

Standard (Check for short):
Tester ConnectionSpecified Condition
EGLS (E18 −3) or EGLS (E12 −33) −Body ground10 k
or higher
(d) Reconnect the EGR valve position sensor connector.
(e) Reconnect the ECM connector.

05−402
−
DIAGNOSTICS ECD SYSTEM (1CD−FTV)(From September, 2003)
AVENSIS Supplement (RM1045E)
NG REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE ECM (See page 10− 29)