2005 TOYOTA AVENSIS Circuit

05−224
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM1045E)
DTC P2120 THROTTLE/PEDAL POSITION
SENSOR/SWITCH ”D” CIRCUIT
DTC P2122 THROTTLE/PEDAL POSITION
SENSOR/SWITCH ”D” CIRCUIT LOW INPUT
DTC P2123 THROTTLE/PEDAL POSITION
SENSOR/SWITCH ”D” CIRCUIT HIGH INPUT
DTC P2125 THROTTLE/PEDAL POSITION
SENSOR/SWITCH ”E” CIRCUIT
DTC P2127 THROTTLE/PEDAL POSITION
SENSOR/SWITCH ”E” CIRCUIT LOW INPUT
DTC P2128 THROTTLE/PEDAL POSITION SENSOR/
SWITCH ”E” CIRCUIT HIGH INPUT
DTC P2138 THROTTLE/PEDAL POSITION
SENSOR/SWITCH ”D”/”E” VOLTAGE
CORRELATION
HINT:
This is the repair procedure for the accelerator pedal position sensor.
05CKT−02

A71015
0
Accelerator Pedal Opening Angle (deg)125
VPA1 VPA2
5
Movable Range
Usable Range
Usable Range *1
*1
Movable Range
Usable Range
*2
Accelerator pedal released (15˚)
Accelerator pedal depressed
(about100˚)
Accelerator Pedal
Position Sensor
Output Voltage (V)
VPA2VPA1 EP2
VCP2
*1:
*
2:
EP1
0.8
105
VCP1*2
*2*1
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
05−225
AVENSIS Supplement (RM1045E)
CIRCUIT DESCRIPTION
HINT:
SThis Electrical Throttle Control System (ETCS) does not use a throttle cable.
SThis accelerator pedal position sensor is a non−contact type.
The accelerator pedal position sensor is mounted on the accelerator pedal bracket. The accelerator pedal
position sensor has 2 sensor elements / signal output: VPA1and VPA2. VPA1is used to detect the actual
accelerator pedal angle (used for engine control) and VPA2 is used to detect malfunctions in VPA1. Voltage
change of VPA1and VPA2 change between 0V and 5V depending on the accelerator pedal angle.
The ECM monitors the accelerator pedal angle from VPA1and VPA2 signal output, and controls the throttle
motor based on these signals.

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

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

−
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

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

A76875
ECM
SCV 5
E13 EFI Relay
1 1 23
Engine Room
J/B No. 4B−W
1MREL 8
E9
Battery FL MAIN B−G2 5
GR
V6
VSV (Intake Air Control Valve)
2
L−B EFI No. 2 1
B−G
W−B
ECW−B
4A
14B 11AEFI
1B−Y
1
2 4
4
44
4
4
B−W Engine Room
R/B No. 1Engine Room R/B No. 4
GR
B−W
EA113IE1 2 Engine Room
J/B No. 1 05−210
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM1045E)
DTC P2008 INTAKE MANIFOLD RUNNER CONTROL
CIRCUIT / OPEN (BANK1)
CIRCUIT DESCRIPTION
The Intake Air Control Valve (IACV) is opened and shut by the actuator with intake manifold vacuum.
It stabilizes the engine combustion. The IACV operation generates swirl air flow in the cylinder.
DTC No.DTC Detection ConditionTrouble Area
P2008Open or short in VSV for IACV circuit 0.5 second or more
(2 trip detection logic)SOpen of short in VSV for IACV circuit
SVSV for IACV
SECM
WIRING DIAGRAM
05HIP−01

A90210
Engine Room R/B No. 4:EFI No.2 fuse
A66053
Engine Room R/B No. 4:
EFI Relay
A85697
Wire Harness Side:VSV for IACV Connector
V6
Front View
−
DIAGNOSTICS SFI SYSTEM (2AZ−FSE)
05 −213
AVENSIS Supplement (RM1045E)
5 CHECK HARNESS AND CONNECTOR(EFI RELAY − VSV FOR IACV)
(a) Inspect the EFI No. 2 fuse.
(1) Remove the EFI No. 2 fuse from the engine room R/B No. 4.
(2) Check for continuity in the EFI No. 2 fuse.
Standard: Continuity
(3) Reinstall the EFI No. 2 fuse.
(b) Remove the EFI relay from the engine room R/B No. 4.
(c) Disconnect the V6 VSV for IACV connector.
(d) Check the resistance between the wire harness side con- nectors.
Standard (Check for open):
Tester ConnectionSpecified Condition
VSV for IACV (V6 −1) −
Engine room R/B No. 4 (EFI relay terminal 3)Below 1

Standard (Check for short):
Tester ConnectionSpecified Condition
VSV for IACV (V6 −1) or
Engine room R/B No. 4 (EFI relay terminal 3) − Body ground10 k
or higher
(e) Reinstall the EFI relay.
(f) Reconnect the VSV for IACV connector.
NG REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
CHECK FOR ECM POWER SOURCE CIRCUIT (See page 05 −236)