TOYOTA AVENSIS 2005 Service Repair Manual

A53765
VCP2 (+) VCPA (+)
EPA (−)
EPA2 (−)
ECM Connector
E9
A53765
VPA2 (+) VPA (+)
EPA (−)
EPA2 (−)
ECM Connector
E9
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
05−229
AVENSIS Supplement (RM1045E)
3 INSPECT ECM(VCPA AND VCP2 VOLTAGE)
(a) Disconnect the A20 accelerator pedal position sensor
connector.
(b) Turn the ignition switch to ON.
(c) Measure the voltage between the terminals of the E9
ECM connector.
Standard:
Tester ConnectionSpecified Condition
VCPA (E9−26)−EPA (E9−28)4.5 to 5.5 V
VCP2 (E9−27)−EPA2 (E9−29)4.5 to 5.5 V
(d) Reconnect the accelerator pedal position sensor connec-
tor.
NG REPLACE ECM (See page10−65 of Pub. No.
RM1018E AVENSIS)
OK
4 INSPECT ECM(VPA AND VPA2 VOLTAGE)
(a) Turn the ignition switch to ON.
(b) Measure the voltage between the terminals of the E9
ECM connector.
Accelerator Pedal PositionTester ConnectionSpecified Condition
ReleasedVPA (E9−22)
−EPA (E9−28)0.5 to1.1V
DepressedVPA (E9−22)
−EPA (E9−28)2.5 to 4.6 V
ReleasedVPA2 (E9−23)
−EPA2 (E9−29)1.5 to 2.9 V
DepressedVPA2 (E9−23)
−EPA2 (E9−29)3.5 to 5.5 V
OK REPLACE ECM (See page10−65 of Pub. No.
RM1018E AVENSIS)
NG

Accelerator Pedal Position Sensor
Connector
A54384
EP2
EP1VPA2
VCP2
VPA1VCP1 Wire Harness Side
LHD
A20
Front View
Accelerator Pedal Position Sensor
Connector
A54384
EP1
EP2
VPA2
VCP1
VPA1VCP2 Wire Harness Side
RHD
A20
Front View
A54404
EPA2
EPA
E9
VCPA VCP2
VPA2
VPA
ECM Connector 05−230
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM1045E)
5 CHECK HARNESS AND CONNECTOR(ACCELERATOR PEDAL POSITION
SENSOR−ECM)
(a) Disconnect the A20 accelerator pedal position sensor
connector.
(b) Disconnect the E9 ECM connector.
(c) Check the resistance between the wire harness side con-
nectors.
Standard (LHD):
(Check for open)
Tester ConnectionSpecified Condition
VPA1(A20−5)−VPA (E9−22)Below1

EP1(A20−3)−EPA (E9−28)Below1

VCP1(A20−6)−VCPA (E9−26)Below1

VPA2 (A20−2)−VPA2 (E9−23)Below1

EP2 (A20−1)−EPA2 (E9−29)Below1

VCP2 (A20−4)−VCP2 (E9−27)Below1

(Check for Short)
Tester ConnectionSpecified Condition
VPA1(A20−5) or VPA (E9−22)−Body ground10k
or higher
EP1(A20−3) or EPA (E9−28)−Body ground10k
or higher
VCP1(A20−6) or VCPA (E9−26)−Body ground10k
or higher
VPA2 (A20−2) or VPA2 (E9−23)−Body ground10k
or higher
EP2 (A20−1) or EPA2 (E9−29)−Body ground10k
or higher
VCP2 (A20−4) or VCP2 (E9−27)−Body ground10k
or higher
Standard (RHD):
(Check for open)
Tester ConnectionSpecified Condition
VPA1(A20−5)−VPA (E9−22)Below1

EP1(A20−1)−EPA (E9−28)Below1

VCP1(A20−4)−VCPA (E9−26)Below1

VPA2 (A20−2)−VPA2 (E9−23)Below1

EP2 (A20−3)−EPA2 (E9−29)Below1

VCP2 (A20−6)−VCP2 (E9−27)Below1

(Check for Short)
Tester ConnectionSpecified Condition
VPA1(A20−5) or VPA (E9−22)−Body ground10k
or higher
EP1(A20−1) or EPA (E9−28)−Body ground10k
or higher
VCP1(A20−4) or VCPA (E9−26)−Body ground10k
or higher
VPA2 (A20−2) or VPA2 (E9−23)−Body ground10k
or higher
EP2 (A20−3) or EPA2 (E9−29)−Body ground10k
or higher
VCP2 (A20−6) or VCP2 (E9−27)−Body ground10k
or higher
(d) Reconnect the accelerator pedal position sensor connec-
tor.
(e) Reconnect the ECM connector.

− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
05−231
AVENSIS Supplement (RM1045E)
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
REPLACE ECM (See page10−65 of Pub. No. RM1018E AVENSIS)

A85832
From Battery+BM
+M
−M
ME01ECM
Motor Control
Circuit Throttle Control MotorTHROTTLE fuse
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
05−219
AVENSIS Supplement (RM1045E)
DTC P2118 THROTTLE ACTUATOR CONTROL MOTOR
CURRENT RANGE/PERFORMANCE
CIRCUIT DESCRIPTION
The Electronic Throttle Control System (ETCS) has a dedicated power supply circuit. The voltage (+BM) is
monitored and when the voltage is low (less than 4V), the ECM concludes that the ETCS has a fault and
current to the throttle control motor is cut.
When the voltage becomes unstable, the ETCS itself becomes unstable. For this reason, when the voltage
is low, the current to the motor is cut. If repairs are made and the system has returned to normal, turn the
ignition switch to OFF. The ECM then allows current to flow to the motor and the motor can be restarted.
HINT:
This Electrical Throttle Control System (ETCS) does not use a throttle cable.
DTC No.DTC Detection ConditionTrouble Area
P2118Open in ETCS power source circuit (+BM)
(1trip detection logic)SOpen in ETCS power source circuit
STHROTTLE fuse
SECM
05HIQ−01

A76877
ECM
+BM
FL MAINTHROTTLE Engine Room J/B No.1
Engine Room R/B No.1
E10
IE2 1A 4B15
2 Engine Room J/B No. 4
6
B−G
Battery4A1
B−G
1 1
1G−RG−Y
A82233
THROTTLE Fuse Engine Room R/B No.1:
A67446
+BM (+) E1(−)
E10E11
ECM Connector
05−220
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM1045E)
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Read 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.
1CHECK FUSE(THROTTLE FUSE)
(a) Remove the THROTTLE fuse from the engine room R/B
No.1.
(b) Check for continuity in the THROTTLE fuse.
Standard: Continuity
(c) Reinstall the THROTTLE fuse.
NG CHECK FOR SHORT IN ALL HARNESSES AND
COMPONENTS CONNECTED TO FUSE
OK
2 INSPECT ECM(+BM VOLTAGE)
(a) Measure the voltage between the specified terminals of
the E10 and E11ECM connectors.
Standard:
Tester ConnectionSpecified Condition
+BM (E10−6)−E1(E11−1)9to14V

A82234
Engine Room R/B No.1:
THROTTLE Fuse
A67404
+BM
E10
ECM Connector
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
05−221
AVENSIS Supplement (RM1045E)
OK REPLACE ECM (See page10−65 of Pub. No.
RM1018E AVENSIS)
NG
3 CHECK HARNESS AND CONNECTOR(ECM−THROTTLE FUSE, THROTTLE FUSE
−BATTERY)
(a) Check the harness and the connector between the
THROTTLE fuse and the ECM.
(1) Remove the THROTTLE fuse from the engine room
R/B No.1.
(2) Disconnect the E10 ECM connector.
(3) Check the resistance between the wire harness
side connectors.
Standard (Check for open):
Tester ConnectionSpecified Condition
Engine room R/B No.1(THROTTLE fuse terminal 2)−
+BM (E10−6)Below1

Standard (Check for short):
Tester ConnectionSpecified Condition
Engine room R/B No.1(THROTTLE fuse terminal 2) or
+BM (E10−6)−Body ground10k
or higher
(4) Reinstall the THROTTLE fuse.
(5) Reconnect the ECM connector.
(b) Check the harness and the connector between the
THROTTLE fuse and the battery.
(1) Remove the THROTTLE fuse from the engine room
R/B No.1.
(2) Disconnect the positive battery cable.
(3) Check the resistance between the wire harness
side connectors.
Standard (Check for open):
Tester ConnectionSpecified Condition
Battery positive cable−
Engine room R/B No.1(THROTTLE fuse terminal1)Below1

Standard (Check for short):
Tester ConnectionSpecified Condition
Battery positive cable or Engine room R/B No.1
(THROTTLE fuse terminal1)−Body ground10k
or higher
(4) Reinstall the THROTTLE fuse.
(5) Reconnect the positive battery cable.
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
CHECK AND REPLACE ENGINE ROOM RELAY BLOCK

−
DIAGNOSTICS SFI SYSTEM (2AZ−FSE)
05 −217
AVENSIS Supplement (RM 1045E)
DTC P2 111 THROTTLE ACTUATOR CONTROL SYSTEM
− STUCK OPEN
DTC P2 11 2 THROTTLE ACTUATOR CONTROL SYSTEM
− STUCK CLOSED
CIRCUIT DESCRIPTION
The throttle motor is operated by the ECM and it opens and closes the throttle valve using gears. The open-
ing angle of the throttle valve is detected by the throttle position sensor, which is mounted on the throttle body.
The throttle position sensor provides feedback to the ECM to control the throttle motor and set the throttle
valve angle in response to driver input.
HINT:
This Electrical Throttle Control System (ETCS) does not use a throttle cable.
DTC No.DTC Detection ConditionTrouble Area
P2 111Throttle valve opening angle is stuck during ECM orders to
close ( 1 trip detection logic)
S Throttle control motor circuit
S Throttle control motor
S Throttle body
S Throttle valve
P2 11 2Throttle valve opening angle is stuck during ECM orders to
open ( 1 trip detection logic)
SThrottle control motor circuit
S Throttle control motor
S Throttle body
S Throttle valve
WIRING DIAGRAM
Refer to DTC P2 102 on page 05 −214.
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 INSPECT THROTTLE BODY ASSY(VISUALLY CHECK THROTTLE VALVE)
(a) Check if a foreign object has been caught between the throttle valve and the housing.
NG REMOVE FOREIGN OBJECT AND CLEANTHROTTLE BODY
OK
05CKQ −02

A59778
M−
M+
Component Side:
Throttle Body
T 1
Front View
B5378 1
Wire Harness Side:
Throttle Body Connector
M −
M+
T1
Front View
A54408ECM Connector
M −
M+ E
11
05 −218
−
DIAGNOSTICS SFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM 1045E)
2 INSPECT THROTTLE BODY ASSY(RESISTANCE OF THROTTLE CONTROL
MOTOR)
(a) Disconnect the T 1 throttle body connector.
(b) Measure the resistance between terminals of the throttle body.
Standard:
Tester ConnectionSpecified Condition
M+ (T 1− 2)− M− (T 1−1 )0.3 to 100
at 20 _ C (68 _ F)
(c) Reconnect the throttle body connector.
NG REPLACE THROTTLE BODY ASSY (See Page 10 − 8)
OK
3 CHECK HARNESS AND CONNECTOR(THROTTLE CONTROL MOTOR − ECM)
(a) Disconnect the T 1 throttle body connector.
(b) Disconnect the E 11 ECM connector.
(c) Check the resistance between the wire harness side con- nectors.
Standard (Check for open):
Tester ConnectionSpecified Condition
M+ (T 1− 2)− M+ (E 11− 3)Below 1

M− (T 1−1 )− M− (E 11− 2)Below 1

Standard (Check for short):
Tester ConnectionSpecified Condition
M+ (T 1− 2) or M+ (E 11− 3)− Body ground10k
or higher
M− (T 1−1 )or M − (E 11− 2)− Body ground10k
or higher
(d) Reconnect the throttle body connector.
(e) Reconnect the ECM connector.
NG REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
CHECK FOR INTERMITTENT PROBLEMS (See page 05 −7)

A54292
T1
Throttle Control Motor
(Built in Throttle Body)
2
1B
WECM
3
2
17M+
M−
E11
(Shielded)
E11
E11
GE01 05−214
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM1045E)
DTC P2102 THROTTLE ACTUATOR CONTROL MOTOR
CIRCUIT LOW
DTC P2103 THROTTLE ACTUATOR CONTROL MOTOR
CIRCUIT HIGH
CIRCUIT DESCRIPTION
The throttle motor is operated by the ECM and it opens and closes the throttle valve.
The opening angle of the throttle valve is detected by the throttle position sensor which is mounted on the
throttle body. The throttle position sensor provides feedback to the ECM. This feedback allows the ECM to
control the throttle motor and monitor the throttle opening angle as the ECM responds to driver input.
HINT:
This Electrical Throttle Control System (ETCS) does not use a throttle cable.
DTC No.DTC Detection ConditionTrouble Area
P2102
Conditions (a) and (b) continue for 2.0 seconds:
(1 trip detection logic)
(a) Throttle control motor output duty greater than 80 %
(b) Throttle control motor current less than 0.5 ASOpen in throttle control motor circuit
SThrottle control motor
SECM
P2103
Either of following conditions is met. (1 trip detection logic)
SThrottle control motor current 10 A or more (0.1 second)
SThrottle control motor current 7A or more (0.6second)
SShort in throttle control motor circuit
SThrottle control motor
SThrottle valve
SThrottle body assembly
SECM
WIRING DIAGRAM
05CKP−02

A59778
M−
M+
Component Side:
Throttle Body
T1
Front View
B53781
Wire Harness Side:
Throttle Body Connector
M −
M+
T1
Front View
A54408ECM Connector
M−
M+ E11
−
DIAGNOSTICS SFI SYSTEM (2AZ−FSE)
05 −215
AVENSIS Supplement (RM1045E)
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 INSPECT THROTTLE BODY ASSY(RESISTANCE OF THROTTLE CONTROL
MOTOR)
(a) Disconnect the T1 throttle body connector.
(b) Measure the resistance between terminals of the throttle
body.
Standard:
Tester ConnectionSpecified Condition
M+ (T1 −2) − M− (T1 −1)0.3 to 100
at 20 _ C (68 _ F)
(c) Reconnect the throttle body connector.
NG REPLACE THROTTLE BODY ASSY (See page 10− 8)
OK
2 CHECK HARNESS AND CONNECTOR(THROTTLE CONTROL MOTOR −ECM)
(a) Disconnect the T1 throttle body connector.
(b) Disconnect the E11 ECM connector.
(c) Check the resistance between the wire harness side con-
nectors.
Standard (Check for open):
Tester ConnectionSpecified Condition
M+ (T1 −2) −M+ (E11 −3)Below 1

M− (T1 −1) −M− (E11 −2)Below 1

Standard (Check for short):
Tester ConnectionSpecified Condition
M+ (T1−2) or M+ (E11 −3) −Body ground10 k
or higher
M− (T1 −1) or M −(E11 −2) −Body ground10 k
or higher
(d) Reconnect the throttle body connector.
(e) Reconnect the ECM connector.
NG REPAIR OR REPLACE HARNESS OR CONNECTOR
OK