2005 TOYOTA AVENSIS diagram

A58697
Intake Air
Chamber
Throttle Valve
To Cylinder
ISC Valve
Valve
ECM
Signal From
Air
Cleaner
From
Terminal 2 of
EFI No.1 Fuse
(See Page 05±124)
A79101
2 VISC DUTY1
GND 3
I10
ISC Valve
G±R5
E13 RSDECM
B±R 12
EA1 B±R
W±B7
E13 E01
W±B
EG
05±100
±
DIAGNOSTICS SFI SYSTEM (1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0505 IDLE CONTROL SYSTEM MALFUNCTION
CIRCUIT DESCRIPTION
The rotary solenoid type of the idle speed control (ISC) valve is
located under the throttle body and intake air bypassing the
throttle valve is directed to the ISC valve through the passage.
In this way the intake air volume bypassing the throttle valve is
regulated, controls the engine speed.
The ECM operates the ISC valve only to perform idle±up and
provide feedback for the target idling speed.
DTC No.DTC Detecting ConditionTrouble Area
P0505Idle speed continues to vary greatly from target speed
(1 trip detection logic)

Open or short in ISC valve circuit

ISC valve is stuck or closed

PCV hose

A/C switch circuit

Air induction system

ECM
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Read freeze frame data using \f  \b \f\f
 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.
05B46±02

A79413
From
Speed SensorSkid
Control
ECU4±Pulse
Combination
Meter4±Pulse
ECM
A79092
C11
Combination Meter
Junction Connector
17
V±W
E10ECM
V±W
SPD 18
J10
J20 H
*1*2
*1: LHD
*2: RHD J20 J10
*1 *2 HHH 05±98
± DIAGNOSTICSSFI SYSTEM (1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0500 VEHICLE SPEED SENSOR MALFUNCTION
CIRCUIT DESCRIPTION
The speed sensor for skid control ECU detects the wheel speed and sends the appropriate signals to the
skid control ECU.
The skid control ECU converts these signals into a 4±pulse signal and outputs it to the combination meter.
After this signal is converted into a more precise rectangular waveform by the waveform shaping circuit in-
side the combination meter, it is then transmitted to the ECM. The ECM determines the vehicle speed based
on the frequency of these pulse signals.
DTC No.DTC Detecting ConditionTrouble Area
P0500
During the vehicle is being driven, no vehicle speed sensor
signal to the ECM
(1 trip detection logic: A/T)
(2 trip detection logic: M/T)
Open or short in speed sensor circuit

Speed sensor

Combination meter

ECM

Skid control ECU
WIRING DIAGRAM
05B45±02

A18294
SPD (+)E1 (±)ECM Connector
E12 E10
A62954
Turn Wheel
4.5±5.5V
0V
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
05±99
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
HINT:
Read freeze frame data using \f \b\f\f
 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 OPERATION OF SPEEDOMETER(SPEEDOMETER OPERATION)
(a)Drive the vehicle and check that the operation of the speedometer in the\
combination meter is normal.
HINT:
The vehicle speed sensor is operating normally if the speedometer display i\
s normal.
NGCHECK SPEEDOMETER CIRCUIT
OK
2INSPECT ECM(CHECK VOLTAGE)
(a)Shift the lever to the neutral position.
(b)Jack up the vehicle.
(c)Turn the ignition switch ON.
(d)Measure the voltage between the terminals of the E10 and E12 ECM connectors as the wheel is turned slowly.
Standard:
Symbols (Terminal No.)Specified condition
SPD (E10±17) ± E1 (E12±7)Generated intermittently
HINT:
The output voltage should fluctuate up and down similarly to the
diagram on the left when the wheel is turned slowly.
NGREPAIR OR REPLACE HARNESS AND CONNECTOR
OK
CHECK AND REPLACE ECM (See page 01±32)

A79073
From
Terminal 3 of
EFI Relay
(See Page 05±124)B±W
EA113
B±W 2V5
VSV for EVAP
1 W±G E1312
EVP1ECM
Engine Room R/B No.4 EFI No.2
4 1 2
B±W
4
05±94
±
DIAGNOSTICS SFI SYSTEM (1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0443 EVAPORATIVE EMISSION CONTROL SYSTEM PURGE CONTROL VALVE CIRCUIT
MALFUNCTION
CIRCUIT DESCRIPTION
To reduce HC emissions, evaporated fuel from the fuel tank is routed through the charcoal canister to the
intake manifold for combustion in the cylinders.
The ECM changes the duty signal to the VSV for EVAP so that the intake quantity of HC emissions becomse
properly for the driving conditions (engine load, engine speed, vehicle speed, \
etc.) after the engine is
warmed up.
DTC No.DTC Detecting ConditionTrouble Area
P0443Proper response to ECM command does not occur (1 trip
detection logic)
Open or short in VSV for EVAP circuit

VSV for EVAP

ECM
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Read freeze frame data using \f  \b \f\f
 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.
05C6D±01

A58694
OX Signal Waveform (Oscilloscope)
1.0 V
0 V 200 msec. /Division
05±92
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
(a)Connect the hand±held tester to the DLC3, or connect the probe of the oscilloscope between terminals HT1A,
HT1B, OX1A, OX1B and E1 of the ECM connector.
(b)Start the engine and warm it up with all the accessories switched OFF until the engine coolant temperature is
stable.
(c)Run the engine at 2,500 to 3,000 rpm for about 3 min.
(d)After confirming that the waveform of the heated oxygen
sensor (bank 1 sensor 1 (OX)) which oscillates around 0.5
V during feedback to the ECM, check the waveform of the
heated oxygen sensor (bank 1 sensor 2 (OX)).
HINT:

If there is a malfunction in the system, the waveform of the
heated oxygen sensor (bank 1 sensor 2 (OX)) is similar
to the wave from of the heated oxygen sensor (bank 1
sensor 1 (OX)) snown in the diagram on the left.

There are some cases that, even though a malfunction
exists, the CHK ENG may not be illuminated.
INSPECTION PROCEDURE
HINT:
Read freeze frame data using \f \b\f\f
 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.
1READ OUTPUT DTC(BESIDES P0420)
(a)Read the DTC using the hand±held tester. Result:
Display (DTC output)Proceed to
Only ºP0420º is outputA
ºP0420º and other DTCs are outputB
HINT:
If any other codes besides ºP0420º are output, perform the troublesh\
ooting for those DTCs first.
BGO TO RELEVANT DTC CHART(See page 05±16)
A

A63955
GND
CH1
(G2)
CH2
(NE+) GND
05±88
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
DTCP0340CAMSHAFT POSITION SENSOR CIRCUIT MALFUNCTION
CIRCUIT DESCRIPTION
The camshaft position sensor (G2 signal) consists of a magnet, iron core \
and pickup coil.
The G2 signal plate has 3 teeth on its outer circumference and is instal\
led on the camshaft timing pulley.
When the camshafts rotate, the protrusion on the signal plate and the air gap on the pickup coil changes,
causing fluctuations in the magnetic field and generating an electromoti\
ve force in the pickup coil.
The NE signal plate (crankshaft timing pulley) has 34 teeth and is instal\
led to the crankshaft. The NE signal
sensor generates 34 signals at every engine revolution. The ECM detects \
the crankshaft angle and the en-
gine revolution based on the NE signals, and the cylinder and the angle of the VVT based on the combination
of the G2 and NE signals.
DTC No.DTC Detecting ConditionTrouble Area
P0340

No camshaft position sensor signal to the ECM during crank-
ing

Open in NE± circuit

Open or short in camshaft position sensor circuit

Camshaft position sensor

Intake camshaft

Timing chain has jumped a tooth

ECM
Reference: Inspection using the oscilloscope.
HINT:
The correct waveform is as shown on the left.
ItemContents
TerminalCH1: G2 ± NE±
CH2: NE+ ± NE±
Equipment Set5V/DIV, 20ms/DIV
ConditionDuring cranking or idling
WIRING DIAGRAM
Refer to DTC P0335 on page05±84.
INSPECTION PROCEDURE
HINT:
Read freeze frame data using \f  \b \f\f
 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.
05B42±03

A79089
C1
Camshaft Position Sensor(Shielded)
1 2ECM
(Shielded) 1
2
EHR
NE+NE± G2 W
G C6
Crankshaft Position Sensor
R RE13
E13
E1326
34
27
BR E
J12
Junction
ConnectorE E
± DIAGNOSTICSSFI SYSTEM (1ZZ±FE/3ZZ±FE)
05±85
AVENSIS REPAIR MANUAL (RM1018E)
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:

Read freeze frame data using    
 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 malfunction.

Perform troubleshooting on ºDTC P0335º first. If no trouble is found, troubleshoot the following me-
chanical system.



A05134
2.2V
A79088
K1
Knock SensorECM
FKN+
E12 (Shielded)
1EB1
11
W
E122
FKN± B
EH J12
J13
Junction
Connector EDEB1 2WB2
BR
BR J12 J13E D
± DIAGNOSTICSSFI SYSTEM (1ZZ±FE/3ZZ±FE)
05±81
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0325 KNOCK SENSOR 1 CIRCUIT MALFUNCTION
(BANK 1)
CIRCUIT DESCRIPTION
Knock sensor is fitted on the cylinder block to detect the engine knocking. This sensor contains a piezoelec-
tric element which generates a voltage when it becomes deformed, which occurs when the cylinder block
vibrates due to knocking. If engine knocking occurs, the ignition timing is delayed to suppress it.
DTC No.DTC Detecting ConditionTrouble Area
P0325No knock sensor signal to the ECM with engine speed 3,000
rpm or more
Open or short in knock sensor circuit

Knock sensor (under±torqued or loose)

ECM
HINT:
If the ECM detects the DTC ºP0325º, it enters the fail±safe mode in which the corrective retarded angle value
is set to the maximum value.
Reference:
Inspection using the oscillascope.
(1) Run the engine at 4,000 rpm, check the waveform
between terminal KNKL of the ECM connector and
body ground.
HINT:
The correct waveform is as shown on the left.
(2) Spread the time on the horizontal axis, and confirm
that period of the wave is 80
seconds (Normal
mode vibration frequency of knock sensor: 11.7
kHz).
HINT:
If the vibration frequency in the normal mode is not 11.7 kHz,
the sensor is out of order.
WIRING DIAGRAM
05C6C±01