2005 TOYOTA AVENSIS MOTOR

−
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

−
DIAGNOSTICS SFI SYSTEM (2AZ−FSE)
05 −1 89
AVENSIS Supplement (RM 1045E)
DTC P0505 IDLE AIR CONTROL SYSTEM
CIRCUIT DESCRIPTION
The idle speed is controlled by the Electric Throttle Control System (ETCS).
ETCS is composed of the throttle motor which operates the throttle valve, the throttle position sensor which
detects the opening angle of the throttle valve, the accelerator pedal position sensor which detects the accel-
erator pedal position,and the one valve type throttle body.
The ECM controls the throttle motor to make the throttle valve opening angle properly for the target idle
speed.
DTC No.DTC Detection ConditionTrouble Area
P0505Idle speed continues to vary greatly from target speed
(2 trip detection logic)S Electric throttle control system
S Air induction system
S PCV hose connection
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 CHECK OTHER DTC OUTPUT(IN ADDITION TO DTC P0505)
(a) Connect the hand −held tester to the DLC3.
(b) Turn the ignition switch to ON and turn the hand −held tester ON.
(c) Select the item: DIAGNOSIS / OBD/MOBD / DTC INFO / CURRENT CODES.
(d) Read the DTCs using the hand −held tester.
Result:
Display (DTC output)Proceed to
P0505A
P0505 and other DTCsB
HINT:
If any other codes besides P0505 are output, perform troubleshoot for those DTCs first.
B GO TO RELEVANT DTC CHART(See page 05 −31)
A
2 CHECK CONNECTION OF PCV HOSE
NG REPAIR OR REPLACE PCV HOSE
OK
05HIN −01

05−514
−
DIAGNOSTICS ECD SYSTEM (1CD −FTV)(From September, 2003)
AVENSIS Supplement (RM 1045E)
5 READ VALUE OF HAND −HELD TESTER(MASS AIR FLOW RATE)
HINT:
DTC P0 100, P0 102 or P0 103 ( 1 trip detection logic) will be present if there is an open or short malfunction
in the mass air flow (MAF) meter, or P0 101 (2 trip detection logic) will be present if there is other malfunction
in the MAF meter.
(a) Disconnect the throttle control motor connector.
(b) Disconnect the EGR valve connector.
(c) Connect the hand −held tester to the DLC3.
(d) Start the engine and turn the hand −held tester ON.
(e) Select the item ”DIAGNOSIS / OBD/MOBD / DATA LIST / ALL / MAF” and read its value displayed on the hand −held tester.
Result:
Engine Speed ConditionAir Flow Rate (gm/s)
800 rpm4to 9
(f) Reconnect the throttle control motor connector.
(g) Reconnect the EGR valve connector.
NG REPLACE MASS AIR FLOW METER
OK
6 CHECK TURBOCHARGING PRESSURE (See on page 13− 6)
NG REPLACE TURBOCHARGER SUB −ASSY
(See page 13−1 2)
OK

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
05−474
− DIAGNOSTICSECD SYSTEM (1CD−FTV)(From September, 2003)
AVENSIS Supplement (RM1045E)
CIRCUIT DESCRIPTION
HINT:
This electrical throttle system does not use a throttle cable.
The accelerator pedal position sensor is mounted on the accelerator pedal bracket and it has the 2 sensors
to detect the accelerator position and malfunction of the accelerator position sensor itself.
In the accelerator pedal position sensor, the voltage applied to pedal terminals VPA1and VPA2 of the ECM
changes between 0 V and 5 V in proportion to the opening angle of the accelerator pedal. The VPA1is 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 the opening angle which is used for detecting malfunction.
The ECM judges the current accelerator pedal opening angle with the signals from pedal terminals VPA1
and VPA2, and the ECM controls the throttle motor based on these signals.
DTC No.DTC Detection ConditionTrouble Area
P2120
Condition (a) continues for 0.5 second or more:
VPA is less than 0.2 V for when accelerator pedal is fully re-
leased, or VPA is more than 4.8 V
P2122VPA is less than 0.2 V for 0.5 second or more when accelera-
tor pedal is fully released
P2123VPA is more than 4.8 V for 2.0 seconds or more
P2125
Condition (a) continues for 0.5 second or more:
(a) VPA2 less than 0.5 V when accelerator pedal is fully re-
leased, or VPA2 is more than 4.8 V when VPA is between
0.2 V and 3.45 V
SOpen or short in accelerator pedal position sensor circuit
SAccelerator pedal position sensor
SECM
P2127VPA2 less than 0.5 V for 0.5 second or more when accelerator
pedal is fully released
P2128VPA2 is more than 4.8 V for 2.0 seconds or more when VPA
between 0.2 V and 3.45 V
P2138
Condition (a) or (b) continues for 2.0 seconds or more:
(a) Difference between VPA and VPA2 is less than 0.02 V
(b) VPA is less than 0.2 V and VPA2 is less than 0.5 V

A84696zNon−reusable part
N·m (kgf·cm, ft·lbf) : Specified torqueThrottle Body AssyThrottle Control Motor
Connector
zThrottle Body Gasket
Water By−pass Hose
No. 2
Water By−pass Hose
No. 1
9.0 (90, 80 in.
lbf)
x4
x4
21 (210, 15)Throttle Body Bracket
8.4 (86, 74 in.
lbf)
Ground TerminalWiring Harness
Protector
8.4 (86, 74 in.
lbf)
10−12
− ENGINE CONTROL SYSTEMKNOCK SENSOR (2AZ−FSE)
AVENSIS Supplement (RM1045E)