TOYOTA AVENSIS 2005 Service Repair Manual

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

A53765
VCP2 (+)VCPA (+)EPA (±)
EPA2 (±)
ECM Connector
E9
A53765
VPA2 (+)VPA (+)
EPA (±)
EPA2 (±)
ECM Connector
E9
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
05±497
AVENSIS REPAIR MANUAL (RM1018E)
3INSPECT ECM(VCPA AND VCP2 VOLTAGE)
(a)Turn the ignition switch ON.
(b)Measure the voltage between the specified terminals of
the E9 ECM connector.
Standard:
Symbols (Terminal No.)Specified condition
VCPA (E9±26) ± EPA (E9±28)45to55VVCP2 (E9±27) ± EPA2 (E9±29)4.5 to 5.5 V
NGCHECK AND REPLACE ECM (See page 01±32)
OK
4INSPECT ECM(VPA AND VPA2 VOLTAGE)
(a)Turn the ignition switch ON.
(b)Measure the voltage between the specified terminals of the E9 ECM connector.
Symbols (Terminal No.)Symbols (Terminal No.)
Accelerator pedal positionVPA (E9±22)
± EPA (E9±28)VPA2 (E9±23) ± EPA2 (E9±29)
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

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

A59778M±
M+
Component Side
Throttle Body
T1
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
05±491
AVENSIS REPAIR MANUAL (RM1018E)
2INSPECT THROTTLE BODY ASSY
(a)Disconnect the T1 throttle body connector.
(b)Measure the motor resistance between terminals M+ and
M±.
Motor resistance: 0.3 to 100
at 20
C (68
F)
NGREPLACE THROTTLE BODY ASSY
OK
3REPLACE ECM AND CLEAR DTC(CHECK IF DTC OUTPUTS REOCCUR)
(a)Replace the ECM.
(b)Clear the DTC (See page 05±294).
(c) Start and warm up the engine.
(d) Run the engine at idle for 15 sec. or more.
(e)Read the DTC (See page 05±294). Standard: No DTC output.
OK NORMAL
NG
REPLACE THROTTLE BODY ASSY

A76877
ECM
+BM
FL MAINTHROTTLE Engine Room J/B No. 1 and
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±R G±Y
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
05±487
AVENSIS REPAIR MANUAL (RM1018E)
DTC P2118 THROTTLE ACTUATOR CONTROL MOTOR
CURRENT RANGE/PERFORMANCE
CIRCUIT DESCRIPTION
If this DTC 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 control system (ETCS) does not use the throttle cable.
DTC No.DTC Detection ConditionTrouble Area
P2118Open in ETCS power source circuit
Open in ETCS power source circuit

ECM
WIRING DIAGRAM
05CKR±01

A82233
THROTTLE Fuse
Engine Room R/B No. 1
A67446
+BM (+)
E1 (±)
E10E11
ECM Connector
05±488
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
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 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
NGCHECK FOR SHORT IN ALL HARNESSES AND COMPONENTS CONNECTED FUSE
OK
2INSPECT ECM(+BM VOLTAGE)
(a)Check the voltage between the specified terminals of the E10 and E11 ECM connectors.
Standard:
Symbols (Terminal No.)Specified condition
+BM (E10±6) ± E1 (E11±1)9 to 14 V
OKCHECK AND REPLACE ECM (See page 01±32)
NG

A82234
Engine Room R/B No. 1
THROTTLE Fuse
A67404
+BM
E10
ECM Connector
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
05±489
AVENSIS REPAIR MANUAL (RM1018E)
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 for continuity between the wire harness side
connectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
THROTTLE fuse (2) ± +BM (E10±6)Continuity
Standard (Check for short):
Symbols (Terminal No.)Specified condition
THROTTLE fuse (2) or +BM (E10±6) ± Body groundNo continuity
(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 battery positive terminal.
(3) Check for continuity between the wire harness side
connectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
Battery positive terminal ± THROTTLE fuse (1)Continuity
Standard (Check for short):
Symbols (Terminal No.)Specified condition
Battery positive terminal or THROTTLE fuse (1)
± Body groundNo continuity
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
CHECK AND REPLACE ENGINE ROOM RELAY BLOCK