2005 TOYOTA AVENSIS diagnostic

05−226
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM1045E) DTC No.
DTC Detection ConditionTrouble Area
P2120Condition (a) continues for 0.5 second or more:
(a) VPA is 0.2 V or less, or 4.8 V or moreSAccelerator pedal position sensor
SECM
P2122
Condition (a) continues for 0.5 second or more when accelera-
tor pedal is fully released:
(a) VPA is 0.2 V or lessSAccelerator pedal position sensor
SOpen in VCPA circuit
SVPA circuit open or ground short
SECM
P2123Condition (a) continues for 2.0 seconds or more:
(a) VPA is 4.8 V or moreSAccelerator pedal position sensor
SOpen in EPA circuit
SECM
P2125Condition (a) continues for 0.5 second or more:
(a) VPA2 is 0.5 V or less, or 4.8 V or moreSAccelerator pedal position sensor
SECM
P2127
Condition (a) continues for 0.5 second or more when accelera-
tor pedal is fully released:
(a) VPA2 is 0.5 V or lessSAccelerator pedal position sensor
SOpen in VCP2 circuit
SVPA2 circuit open or ground short
SECM
P2128
Conditions (a) and (b) continue for 2.0 seconds or more:
(a) VPA2 is 4.8 V or more
(b) VPA is 0.2 V or more, and 3.45 V or lessSAccelerator pedal position sensor
SOpen in EPA2 circuit
SECM
P2138
Condition (a) or (b) continues for 2.0 seconds or more:
(a) Difference between VPA and VPA2 is 0.02 V or less
(b) VPA is 0.2 V or less and VPA2 is 0.5 V or lessSVPA and VPA2 circuit are short−circuit
SAccelerator pedal position sensor
SECM
HINT:
After confirming DTC P2120, P2122, P2123, P2125, P2127, P2128 and P2138, confirm the throttle valve
opening using the hand−held tester.
Accelerator pedal position expressed as voltage output
Trouble areaAccelerator pedal releasedAccelerator pedal depressedTroublearea
ACCEL POS #1ACCEL POS #2ACCEL POS #1ACCEL POS #2
VCP circuit open0 to 0.2 V0 to 0.2 V0 to 0.2 V0 to 0.2 V
VPA circuit open or ground short0 to 0.2 V1.2 to 2.0 V0 to 0.2 V3.4 to 5.3 V
VPA2 circuit open or ground short0.5 to1.1V0 to 0.2 V2.6 to 4.5 V0 to 0.2 V
EP circuit open4.5 to 5.5 V4.5 to 5.5 V4.5 to 5.5 V4.5 to 5.5 V

A76878
A20
Accelerator pedal
Position Sensor
VCP16 (LHD)
E926ECM
VCPA B
4 (RHD)
(LHD)B
(LHD) 5
IG2
B
(RHD)
VPA15 (LHD)
E922
VPA G
5 (RHD)
(LHD)G
(LHD) 6
IG2
G
(RHD)
EP13 (LHD)
E928
EPA Y
1(RHD)
(LHD)Y
(LHD) 1
IG2
Y
(RHD)
VCP24 (LHD)
E927
VCP2 B
6 (RHD)
(LHD)B
(LHD) 7
IG2
B
(RHD)
VPA22 (LHD)
E923
VPA2 W
2 (RHD)
(LHD)W
(LHD) 2
IG2
W
(RHD)
EP21(LHD)
E929
EPA2 Y
3 (RHD)
(LHD)Y
(LHD) 3
IG2
Y
(RHD)
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
05−227
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.

FI7052DepressedReleased
A82236
VCP1 VCP2 EP2
EP1
LHD
Accelerator Pedal Assy
321
654
RHD
Accelerator Pedal Assy
321
654
VCP2 EP2
EP1 VCP1
A20
A20
05−228
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM1045E)
1READ VALUE OF HAND−HELD TESTER(ACCEL POS #1AND ACCEL POS #2)
(a) Connect the hand−held tester to the DLC3.
(b) Turn the ignition switch to ON.
(c) On the hand−held tester, select the item: DIAGNOSIS /
OBD/MOBD / DATA LIST / ETCS / ACCEL POS #1and
ACCEL POS #2. Read the values.
Standard:
Accelerator PedalACCEL POS #1ACCEL POS #2
Released0.5 to1.1V1.5 to 2.9 V
Depressed2.5 to 4.6 V3.5 to 5.5 V
OK REPLACE ECM (See page10−65 of Pub. No.
RM1018E AVENSIS)
NG
2 INSPECT ACCELERATOR PEDAL ASSY(ACCELERATOR PEDAL POSITION
SENSOR)
(a) Disconnect the A20 accelerator pedal position sensor
connector.
(b) Measure the resistance between each terminal.
Standard (LHD):
Tester ConnectionSpecified Condition
EP1(A20−3)−VCP1(A20−6)2.25 to 4.75 k
at 20_C (68_F)
EP2 (A20−1)−VCP2 (A20−4)2.25 to 4.75 k
at 20_C (68_F)
Standard (RHD):
Tester ConnectionSpecified Condition
EP1(A20−1)−VCP1(A20−4)2.25 to 4.75 k
at 20_C (68_F)
EP2 (A20−3)−VCP2 (A20−6)2.25 to 4.75 k
at 20_C (68_F)
(c) Reconnect the accelerator pedal position sensor connec-
tor.
NG REPLACE ACCELERATOR PEDAL ASSY
OK

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