diagram TOYOTA AVENSIS 2005 Service User Guide

A72925
A6
Intake Air Temp. Sensor
(built in Mass Air Flow Meter)
4
5 G±R
BR E2
THA ECM
20
E13
E13 28 5V
R
THA
E2
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
05±31
AVENSIS REPAIR MANUAL (RM1018E)
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 d\
etermining whether the vehicle
was running or stopped, the engine was warmed up or not, the air±fuel ra\
tio was lean or rich, etc. at
the time of the malfunction.

If different DTCs that are related to a different system are output simultaneously while terminal E2 is
used as a ground terminal, terminal E2 may be open.
1READ VALUE OF HAND±HELD TESTER(INTAKE AIR TEMPERATURE)
(a)Connect the hand±held tester to the DLC3.
(b)Turn the ignition switch ON.
(c)Select the item ºDIAGNOSIS / OBD/MOBD / DATA LIST / ALL / INTAKE AIRº and read its value dis- played on the hand±held tester.
Temperature: The same as actual intake air temperature
Result:
Temperature DisplayedProceed to
±40 C (±40 F)A
140 C (284 F) or moreB
OK (Same as present temperature)C
HINT:

If there is an open circuit, the hand±held tester indicates ±40
C (±40
F).

If there is a short circuit, the hand±held tester indicates 140
C (284
F) or more.
BGo to step 4
CCHECK FOR INTERMITTENT PROBLEMS (See Page 05±5)
A

A79095
Battery FL
MAINB±Y
E12BATT
BR
E1 E9
IO1 1 EFI
7 7
3
EHECM Engine Room R/B No.1 and
Engine Room J/B No.1
2 1
1AB±Y
*1: LHD
*2: RHD IE37
*1
*2 1
Engine Room
J/B No.4 4A 1
4B 1B±G
B±G
± DIAGNOSTICSSFI SYSTEM (1ZZ±FE/3ZZ±FE)
05±119
AVENSIS REPAIR MANUAL (RM1018E)
DTC P1600 ECM BATT MALFUNCTION
CIRCUIT DESCRIPTION
Battery positive voltage is applied to terminal BATT of the ECM even the ignition switch is OFF for the DTC
memory and air±fuel ratio adaptive control value memory, etc.
DTC No.DTC Detecting ConditionTrouble Area
P1600Open in back up power source circuit
Open in back up power source circuit

ECM
HINT:
If DTC P1600 is displayed, the ECM does not store other DTCs.
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 mal-
function.
05B49±02

A79094
*1: LHD
*2: RHD
*3: SEDAN
*4: LIFT BACK
*5: WAGON IE36
IR11 G±W
(*1)
G±W
(*2)G±W
G±W(*1)
(*2)
1
2DA DC
DM
1 210Driver Side J/B
E10STPECM
19
G±W
G±W
G±WG±W
G±W
G±W
G±W
G±W J30 C
BJ30 J30
J31
J31
B CC
2
1 R±W
IR1 2 IE3 11
DA22
STOP
DN1Driver
Side J/BCH20
High Mounted
Stop Light
J32
Junction
Connector W±B (*1)(*2) R±W
R±W
(*1)(*2) R±W(*3)
(*3)
C(*4, *5)
(*4, *5)
(*4, *5)
(*4)
(*5)
6 4 1
6 5 21 4 7
3 3 6 (*3)
(*4)
(*5)(*3)
(*4)
(*5)
(*3)
(*4)
(*5)(*3)
(*4)
(*5) R13
Rear
Combination
Light LHR14
Rear
Combination
Light RH Junction
ConnectorN8
Noise
FilterBD1 1
BF1 3
BE1 1L
G±W
G±W
1
2 H20
High
Mounted
Stop Light(*4)
(*4)(*5)
L
W±B
W±B (*4)(*5)
(*5)
(*4) (*4)
(*5)
(*4) (*5)
(*5)(*4, *5) W±B W±B
W±B
W±BW±B W±B
(*3)
W±B
(*3)W±B W±B
W±B
(*4, *5)
W±B Junction
Connector
Junction
Connector Engine
Room
J/B No.4 B±G
B±GALT 2
1
4B 14D
FL MAIN 1
J31 J30 B
CBD1
BF1BG1
J33
J34 BE1
BG14
A
A 2
2
3 4
Battery
BS
BTBX S13
Stop Light
Switch1 05±116
± DIAGNOSTICSSFI SYSTEM (1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
WIRING DIAGRAM

A63991
ECM
C2
Camshaft Timing
Oil Control Valve
2
1
Y±B
W±G
OCV+
OCV±
15
14
E13
E13
05±112
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
DTCP1349VVT SYSTEM MALFUNCTION (BANK 1)
CIRCUIT DESCRIPTION
VVT system controls the intake valve timing to proper timing in response to\
driving condition.
The ECM controls the oil control valve (OCV) to make the intake valve timing properly, oil pressure regulated
by the OCV is supplied to the valiable valve timing (VVT) controller, and then the VVT controller changes
relative position between the camshaft and the crankshaft.
DTC No.DTC Detecting ConditionTrouble Area
P1349
Condition (a) or (b) continues with engine speed at 400 to
4,000 rpm after the engine is warmed up
(a)Valve timing does not change from the current valve timing
(b)Current valve timing is fixed
Valve timing

OCV

VVT controller assembly

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.
1CHECK VALVE TIMING (See page 14±49)
NGADJUST VALVE TIMING(See page 14±49)
OK
05C6F±01


A79093
ECM
EH W±B E13
IGT1
IGF
E13
E13
E13
E13 23 IGT2
IGT3
IGT4
8
10
11
R±W
3
2
1
I1
Ignition Coil and
Igniter No.1
I2
Ignition Coil and
Igniter No.2
I3
Ignition Coil and
Igniter No.3
I4
Ignition Coil and
Igniter No.4
R±B
W±B 4 3
2
B±R
1
1
1
B±R
R±B
33
2
2
L±YW±R
W±R W±R
4 4 4
W±B
W±B
W±B
W±B
R±B
W±R
R±B R±B
From Terminal 3
of IG2 Relay
(See Page 05±124)
W±B LG±B
P
W±R
W±R
W±R 9
R±B 1N2
Noise
Filter R±B
8 EA1
±
DIAGNOSTICS SFI SYSTEM (1ZZ±FE/3ZZ±FE)
05±105
AVENSIS REPAIR MANUAL (RM1018E)
WIRING DIAGRAM

A18294
IGT4IGT3IGT2IGT1
ECM Connector
E1
E13E12
IGF
A63956
CH1
(IGT1 ± 4)
CH2
(IGF1)
GND
GND
05±106
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
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.
1PERFORM SIMULATION TEST
(a)Clear the DTC (See page 05±5)
(b)Shuffle arrangement of the ighition coil and igniters.
NOTICE:
Do not shuffle the connectors.
(c)Perform the simulation test.
(d)Clear the DTC (See page 05±5) Result:
Display (DTC output)Proceed to
The same DTC is output againA
The other DTC is outputB
BREPLACE IGNITION COIL
A
2INSPECT ECM(IGT1, IGT2, IGT3, IGT4 AND IGF SIGNAL)
(a)Inspection using the oscilloscope.
(b)During cranking or idling, check the waveform between terminals IGT1 to IGT4 and E1, and IGF1 and E1 of the
ECM connector.
Standard:
ItemContents
TerminalCH1: IGT1, IGT2, IGT3, IGT4 ± E1
CH2: IGF ± E1
Equipment Set2V/DIV, 20ms/DIV
ConditionWhile the engine is cranking or idling
HINT:
Correct waveform is as shown in the diagram on the left.
NGCHECK AND REPLACE ECM (See page 01±32)
OK

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