2005 TOYOTA AVENSIS sensor

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
(about 100
)
Accelerator Pedal
Position Sensor
Output Voltage (V)
VPA2VPA1 EP2
VCP2
*1:
*
2:
EP1
0.8
105
VCP1*2
*2*1
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
05±493
AVENSIS REPAIR MANUAL (RM1018E)
CIRCUIT DESCRIPTION
HINT:
This electrical throttle system is no used throttle cable.
The accelerator pedal position sensor is mounted on the accelerator pedal bracket and it have the 2 sensors
to detect the accelerator position and a malfunction of the accelerator position sensor.
In the accelerator pedal position sensor, the voltage applied to VPA1 and VPA2 of the ECM changes be-
tween 0 V and 5 V in proportion to the opening angle of the accelerator pedal. The VPA1 is a signal to indicate
the actual accelerator pedal opening angle which is used for the engine control, and the VPA2 is a signal
to indicate the information about VPA1 which is used for detecting a malfunction in VPA1.
The ECM monitors the current opening angle of the accelerator pedal from these signals input from VPA1
and VPA2, and controls the throttle motor based on these signals.

05±494
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)DTC No.
DTC Detection ConditionTrouble Area
P2120
Condition (a) continues for 0.5 sec. or more:
(a) VPA less than 0.2 V and VPA2 greater than 0.97 deg, or
VPA greater than 4.8 V
P2122
Conditions (a) and (b) continue for 0.5 sec. or more:
(a) VPA less than 0.2 V
(b) VPA2 greater than 0.97 deg
P2123Condition (a) continues for 2.0 sec. or more:
(a) VPA greater than 4.8 V
P2125
Condition (a) continues for 0.5 sec. or more:
(a) VPA2 less than 0.5 V and VPA greater than 0.97 deg, or
VPA2 greater than 4.8 V and VPA greater than 0.2 V but
less than 3.45 V

Open or short in accelerator pedal position sensor circuit

Accelerator pedal position sensor

ECM
P2127
Conditions (a) and (b) continue for 0.5 sec. or more:
(a) VPA2 less than 0.5 V
(b) VPA greater than 0.97 deg
P2128
Conditions (a) and (b) continue for 2.0 sec. or more:
(a) VPA2 greater than 4.8 V
(b) VPA greater than 0.2 V but less than 3.45 V
P2138
Condition (a) or (b) continues for 2.0 sec. or more:
(a) Difference between VPA and VPA2 less than 0.02 V
(b) VPA less than 0.2 V and VPA2 less than 0.5 V
HINT:
After confirming ºDTC P2120, P2122, P2123, P2125, P2127, P2128 and P2138º, use the hand±held tester
to confirm the accelerator pedal position sensor output voltage.
Accelerator pedal position expressed as voltage output
Trouble areaAccelerator pedal releasedAccelerator pedal depressed
ACCEL POS #1ACCEL POS #2ACCEL POS #1ACCEL POS #2
VCP circuit open0 V0 V0 V0 V
VPA circuit open or ground short0 V1.5 to 2.9 V0 V3.5 to 5.5 V
VPA2 circuit open or ground short0.5 to 1.1 V0 V2.5 to 4.6 V0 V
EP circuit open5 V5 V5 V5 V

A76878
A20
Accel 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 (1AZ±FSE)
05±495
AVENSIS REPAIR MANUAL (RM1018E)
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, it is useful for determining whether the vehicle was running
or stopped, the engine was warmed up or not, the air±fuel ratio was lean or rich, etc. at the time of the mal-
function.

FI7052DepressedReleased
A82236
VCP1VCP2
EP2
EP1
LHD Accelerator Pedal Assy
321
6 54
RHD
Accelerator Pedal Assy
321
65 4
VCP2EP2
EP1
VCP1
05±496
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
1READ VALUE OF HAND±HELD TESTER(ACCEL POS #1 AND ACCEL POS #2)
(a)Connect the hand±held tester to the DLC3.
(b)Turn the ignition switch ON.
(c)Select the item ºDIAGNOSIS / OBD/MOBD / DATA LIST / ETCS / ACCEL POS #1 and ACCEL POS #2º and read
its value displayed on the hand±held tester.
Standard:
Accelerator pedalACCEL POS #1ACCEL POS #2
Released0.5 to 1.1 V1.5 to 2.9 V
Depressed2.5 to 4.6 V3.5 to 5.5 V
OKCHECK AND REPLACE ECM (See page 01±32)
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):
Symbols (Terminal No.)Resistance
EP1 (3) ± VCP1 (6)225to475k
at 20
C (68
F)EP2 (1) ± VCP2 (4)2.25 to 4.75 k
at 20
C (68
F)
Standard (RHD):
Symbols (Terminal No.)Resistance
EP1 (1) ± VCP1 (4)225to475k
at 20
C (68
F)EP2 (3) ± VCP2 (6)2.25 to 4.75 k
at 20
C (68
F)
NG REPLACE ACCELERATOR PEDAL ASSY
OK

A54384
EP2EP1VPA2
VCP2 VPA1VCP1
Wire Harness Side
LHD
A20 Accelerator Pedal Position
Sensor Connector
A54384
EP1EP2VPA2
VCP1 VPA1VCP2
Wire Harness Side
RHD
A20 Accelerator Pedal Position
Sensor Connector
A54404
EPA2
EPA
E9
VCPA
VCP2
VPA2
VPA
ECM Connector
05±498
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
5CHECK 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 for continuity between the wire harness side con- nectors.
Standard (LHD):
(Check for open)
Symbols (Terminal No.)Specified condition
VPA1 (A20±5) ± VPA (E9±22)
EP1 (A20±3) ± EPA (E9±28)
VCP1 (A20±6) ± VCPA (E9±26)ContinuityVPA2 (A20±2) ± VPA2 (E9±23)Continuity
EP2 (A20±1) ± EPA2 (E9±29)
VCP2 (A20±4) ± VCP2 (E9±27)
(Check for Short)
Symbols (Terminal No.)Specified condition
VPA1 (A20±5) or VPA (E9±22) ± Body ground
EP1 (A20±3) or EPA (E9±28) ± Body ground
VCP1 (A20±6) or VCPA (E9±26) ± Body groundNocontinuityVPA2 (A20±2) or VPA2 (E9±23) ± Body groundNo continuity
EP2 (A20±1) or EPA2 (E9±29) ± Body ground
VCP2 (A20±4) or VCP2 (E9±27) ± Body ground
Standard (RHD):
(Check for open)
Symbols (Terminal No.)Specified condition
VPA1 (A20±5) ± VPA (E9±22)
EP1 (A20±1) ± EPA (E9±28)
VCP1 (A20±4) ± VCPA (E9±26)ContinuityVPA2 (A20±2) ± VPA2 (E9±23)Continuity
EP2 (A20±3) ± EPA2 (E9±29)
VCP2 (A20±6) ± VCP2 (E9±27)
(Check for Short)
Symbols (Terminal No.)Specified condition
VPA1 (A20±5) or VPA (E9±22) ± Body ground
EP1 (A20±1) or EPA (E9±28) ± Body ground
VCP1 (A20±4) or VCPA (E9±26) ± Body groundNocontinuityVPA2 (A20±2) or VPA2 (E9±23) ± Body groundNo continuity
EP2 (A20±3) or EPA2 (E9±29) ± Body ground
VCP2 (A20±6) or VCP2 (E9±27) ± Body ground
NGREPAIR OR REPLACE HARNESS OR CONNECTOR
OK
CHECK AND REPLACE ECM (See page 01±32)

05±490
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
DTCP2119THROTTLE ACTUATOR CONTROL THROTTLE BODY RANGE/PERFORMANCE
CIRCUIT DESCRIPTION
The Electric Throttle Control System (ETCS) is composed of the throttle m\
otor that operates the throttle
valve, the throttle position sensor that detects the opening angle of the throttle valve, the accelerator pedal
position sensor that detects the accelerator pedal position, the ECM that contro\
ls the ETCS, and the one
valve type throttle body.
The ECM controls the throttle motor to provide the proper throttle valve\
opening angle in response to the
driving condition.
The throttle position sensor which is mounted on the throttle body detects \
the opening angle of the throttle
valve, and it provides feedback to the ECM to control the throttle motor.
If the ETCS has a malfunction, the ECM shuts down the power for the throttle motor, and the throttle valve
is closed by the return spring. And the throttle valve is locked at a ce\
rtain opening angle. Also, the whole
electronically controlled throttle operation is cancelled until the system returns to normal and the ignition
switch is turned OFF.
DTC No.DTC Detection ConditionTrouble Area
P2119Throttle opening angle continues to vary greatly from target
throttle opening angle
Electric throttle control system

ECM
WIRING DIAGRAM
Refer to DTC P2102 on page 05±483.
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, it is useful for determi\
ning whether the vehicle was running
or stopped, the engine was warmed up or not, the air±fuel ratio was lea\
n or rich, etc. at the time of the mal-
function.
1CHECK OTHER DTC OUTPUT(IN ADDITION TO DTC P2119)
(a)Read the DTC using hand±held tester.
Result:
Display (DTC output)Proceed to
Only P2119 is outputA
P2119 and other DTCs are outputB
HINT:
If any other codes besides P2119 are output, perform the troubleshooting for those DTCs first.
BGO TO RELEVANT DTC CHART (See page 05±309)
A
05CKS±01

A54292
T1
Throttle Control Motor
(Built in Throttle Body)
2
1B
WECM
3
2
17M+
M±
E11
(Shielded)
E11
E11
GE01
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
05±483
AVENSIS REPAIR MANUAL (RM1018E)
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. It provides feedback to the ECM to control the throttle motor in order to regulate the throttle
valve opening angle properly in response to the driving condition.
If this malfunction is detected, the ECM shuts down the power for the throttle motor, and the throttle valve
is closed by the return spring. And the throttle valve is locked at a certain opening angle. Also, the whole
electronically controlled throttle operation is cancelled until the system returns to normal and the ignition
switch is turned OFF.
HINT:
This electrical throttle system does not use the throttle cable.
DTC No.DTC Detection ConditionTrouble Area
P2102
Conditions (a) and (b) continue for 2.0 seconds:
(a) Throttle control motor output duty greater than 80 %
(b) Throttle control motor current less than 0.5 A
Open in throttle control motor circuit

Throttle control motor

ECM
Throttle control motor current greater than 10 A
Short in throttle control motor circuit
P2103Condition (a) continues for 0.6 seconds:
(a) Throttle control motor current greater than 7 A
Short in throttle control motor circuit

Throttle control motor

ECM
WIRING DIAGRAM
05CKP±01

054JF±04
±
DIAGNOSTICS ECD SYSTEM (1CD±FTV)
05±551
AVENSIS REPAIR MANUAL (RM1018E)
PROBLEM SYMPTOMS TABLE
When the malfunction code is not confirmed the DTC check and the problem sti\
ll can not be confirmed in
the basic inspection, then proceed to this step and perform troubleshooting\
according to the numbered order
given in the table below.
SymptomSuspect AreaSee page
Does not crank (Difficult to start)
2. Starter
3. Starter relay
4. Engine coolant temperature sensor19±22
19±22
10±56
Difficult to start with a cold engine
1. STA signal circuit
2. Injector
3. Fuel filter
4. Compression
5. EC

6. Supply pump
7. Fuel pressure sensor
8. Diesel throttle
9. Glow plug system05±691 11±56
11±82
14±266 10±56
10±56
10±56
10±56
10±56
Difficult to start with a warm engine
1. STA signal circuit
2. Injector
3. Fuel filter
4. Compression
5. EC

6. Supply pump
7. Fuel pressure sensor
8. Diesel throttle05±691 11±56
11±82
14±266 10±56
10±56
10±56
10±56
Engine stalls soon after starting
1. Fuel filter
2. Injector
3. EC
power source circuit
4. EC

5. Supply pump
6. Fuel pressure sensor
7. Diesel throttle11±82
11±56
05±686 10±56
10±56
10±56
10±56
Engine stalls (Other than conditions listed abobe)
1. EC
power source circuit
2. Injector
3. EC

4. Supply pump
5. Fuel pressure sensor
6. Diesel throttle05±686 11±56
10±56
10±56
10±56
10±56
Incorrect first idle (Poor idling)
1. Fuel filter
2. Injector
3. EC

4. Supply pump
5. Fuel pressure sensor11±82
11±56
10±56
10±56
10±56
High engine idle speed (Poor idling)
1. A/C signal circuit
2. Injector
3. STA signal circuit
4. EC

5. Supply pump
6. Fuel pressure sensor55±3
11±56
05±691 10±56
10±56
10±56